Deposition of palladium-copper nanostructure on reduced graphene oxide by a simple method toward formic acid oxidation
Publication date: Available online 15 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Mehdi Zareie Yazdan-Abad, Nafiseh Alfi, Majid Farsadrooh, Kagan Kerman, Meissam NoroozifarAbstractA simple and fast galvanic reduction method is applied to the preparation of Pd-Cu/rGO modified electrode. The preparation method includes reduction of deposited graphene oxide (GO) on the Glassy Carbon Electrode (GCE), and reduction of deposited CuCl2-PdCl2 on reduced graphene oxide. Both reduction steps are performed using 2% aqueous Zn/HCl solution. During the second step, palladium-copper bimetallic nanonetwork was creat...
Source: Journal of Electroanalytical Chemistry - July 15, 2019 Category: Chemistry Source Type: research

Electrochemical behavior of esomeprazole: Its determination at Au electrode as standard and in injection powder combined with the study of its degradation
Publication date: Available online 13 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): M. Avramov Ivić, J. Lović, S. Stevanović, N.D. Nikolić, N. Trišović, J. Lađarević, D. Vuković, S. Drmanić, A. Mladenović, M. Jadranin, S.D. Petrović, D. MijinAbstractEsomeprazole is the most effective of the proton-pump inhibitors for the acid-related diseases and at first was examined for the electroanalytical purposes. The drug standard and as a content of injection powder was investigated by cyclic voltammetry (CV) and quantitatively determined using square wave voltammetry (SWV) via its electrooxida...
Source: Journal of Electroanalytical Chemistry - July 15, 2019 Category: Chemistry Source Type: research

Hetero atoms doped carbon dots modified electrodes for the sensitive and selective determination of phenolic anti-oxidant in coconut oil
Publication date: Available online 13 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): R. Karthikeyan, D. James Nelson, Ajay Ajith, S. Abraham JohnAbstractCarbon dots (CDs) and CDs doped with nitrogen (N-CDs) and nitrogen-sulphur (N,S-CDs) were prepared by ultrasonication using different precursors. The HR-TEM images showed the average particle size of CDs, N-CDs and N,S-CDs was found to be 1.6, 2.0 and 1.9 nm, respectively. The synthesized different CDs were modified on glassy carbon (GC) electrode by immersing it on the respective CDs for 8 h. The modification of CDs was confirmed by attenuated total...
Source: Journal of Electroanalytical Chemistry - July 13, 2019 Category: Chemistry Source Type: research

Stripping Voltammetry with Semi-Circular Potential Waves: Reversible Systems
Publication date: Available online 11 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Yuki Uchida, Enno Kätelhön, Richard G. ComptonAbstractWe investigate stripping voltammetry using a semi-circular potential wave. Our results show that the herein introduced method greatly amplifies the current compared to the conventional linear-sweep method and can thus markedly increase the sensitivity of voltammetric stripping over linear-sweep methods. The shape of the obtained voltammograms features a characteristic dependency on the analyte formal potential which may be exploited to gain additional select...
Source: Journal of Electroanalytical Chemistry - July 12, 2019 Category: Chemistry Source Type: research

Highly sensitive and selective detection of dopamine using overoxidized polypyrrole/sodium dodecyl sulfate-modified carbon nanotube electrodes
Publication date: Available online 10 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Gayoung Eom, Chaerin Oh, Jeong Moon, Hyojung Kim, Mi Kyung Kim, Kiup Kim, Ji-Won Seo, Taejoon Kang, Hyunjoo J. LeeAbstractDopamine (DA), an organic chemical neurotransmitter in the human brain, plays important roles in neuronal reward, motor control, and decision making. Thus, accurate quantification of DA concentration is essential for the investigation of various dopaminergic neural circuits and diagnosis of neurological diseases. Herein, we report an overoxidized polypyrrole/sodium dodecyl sulfate (SDS)-modified multi...
Source: Journal of Electroanalytical Chemistry - July 10, 2019 Category: Chemistry Source Type: research

Double-pulse chronoamperometry using short times for the kinetic study of simple quasi-reversible electrochemical reactions at low overpotentials
Publication date: Available online 10 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Fernando M. de Oliveira, Leonardo M. Da Silva, Wallans T.P. dos SantosAbstractThis work presents a simple and fast way to determinate the standard heterogeneous rate constant (k0) of simple quasi-reversible electrochemical reactions based on the short time double-pulse chronoamperometry at low overpotentials. The value of k0 was determined for the faradaic reaction involving redox couples of iron complexes on a commercial glassy carbon electrode. The errors involved in this type of analysis were evaluated by finite diffe...
Source: Journal of Electroanalytical Chemistry - July 10, 2019 Category: Chemistry Source Type: research

Synthesis and adsorption behavior of dendritic Fibrous Nano-silica (DFNS) grafted by d-penicillamine as an advanced nanomaterial for the removal of some metal ions from contaminated water
Publication date: 1 September 2019Source: Journal of Electroanalytical Chemistry, Volume 848Author(s): Maryam Mahmudi, Nasrin Shadjou, Fatemeh Ahour Mohammad HasanzadehAbstractIn this work, d-penicillamine-modified dendritic Fibrous Nano-silica grafted by amine groups (dPA-DFNS-NH2) have been successfully synthesized which CTAB was used as a template. Surface area, average pore size, and pore volume of dPA-DFNS-NH2 was determined by BET/BJH analysis which were 78.2 m2 g−1, 6.7 nm, and 0.13 cm3 g−1. After the functionalization of DFNS-NH2 by dPA, the adsorption behavior of the dPA-DFNS-NH2 fo...
Source: Journal of Electroanalytical Chemistry - July 10, 2019 Category: Chemistry Source Type: research

Theory of microscopic electrodeposition under a uniform parallel magnetic field - 1. Nonequilibrium fluctuations of magnetohydrodynamic (MHD) flow
Publication date: Available online 8 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Ryoichi Morimoto, Miki Miura, Atsushi Sugiyama, Makoto Miura, Yoshinobu Oshikiri, Iwao Mogi, Satoshi Takagi, Yusuke Yamauchi, Ryoichi AogakiAbstractNonequilibrium fluctuations of concentration, velocity and so on are formulated for electrode reactions including electrodeposition under a uniform magnetic field parallel to electrode surface. In electrodeposition, nonequilibrium fluctuations occur on the both sides of the electrode surface and solution; on the electrode-surface side, three-dimensional (3D) and two-dimensiona...
Source: Journal of Electroanalytical Chemistry - July 9, 2019 Category: Chemistry Source Type: research

Visible-light-driven polydopamine/CdS QDs hybrid materials with synergistic photocatalytic activity
Publication date: Available online 8 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Majid Arvand, Sharareh Sayyar, Shiva HemmatiAbstractAn ultrasensitive photoelectrochemical (PEC) sensor for progesterone (P4) detection was synthesized based on electrochemical synthesis of CdS quantum dots (QDs) and then equipped chemically with polydopamine (PDA) to decorate PDA@CdS QDs/Ti structure on the Ti substrate. It was found that the sensitizers can significantly enhance the photocurrent and the as-prepared PDA@CdS QDs hybrid materials displayed much higher photocatalytic activity than the CdS QDs/Ti and PDA/Ti ...
Source: Journal of Electroanalytical Chemistry - July 9, 2019 Category: Chemistry Source Type: research

The potency of γ-valerolactone as bio-sourced polar aprotic organic medium for the electrocarboxlation of furfural by CO2
Publication date: Available online 8 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Florent Boissou, Stève Baranton, Mehrad Tarighi, Karine De Oliveira Vigier, Christophe CoutanceauAbstractThe reductive electro-carboxylation of furfural at a Pt/C electrode was studied in a bio-sourced γ-valerolactone (GVL) solvent using linear scan voltammetry, in situ infrared spectroscopy (in situ FTIRS) under electrode potential control and by chrono-amperometry (CA) with analysis of reaction products. In situ FTIRS measurements indicated that GVL reacted at the electrode in the absence of furfural and/or...
Source: Journal of Electroanalytical Chemistry - July 9, 2019 Category: Chemistry Source Type: research

Modeling of mass transfer during anodic dissolution of vertical wire tungsten electrode in alkaline solutions
Publication date: Available online 8 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Vladimir M. Volgin, Alexey D. DavydovAbstractThe problem of mass transfer during anodic dissolution of vertical wire tungsten electrode in the alkaline solution under the conditions of natural convection is solved numerically. The concentration dependences of ionic diffusion coefficients, solution density and viscosity are taken into account. The distributions of concentrations, current density and potential over the near-anode layer are determined. The dependence of limiting current on the concentration of alkaline solut...
Source: Journal of Electroanalytical Chemistry - July 9, 2019 Category: Chemistry Source Type: research

The application of carbon nanomaterials as electrode surface modifiers for the voltammetric sensing of nitroxinil – A comparative study
Publication date: Available online 9 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Karolina Sipa, Mariola Brycht, Andrzej Leniart, Sławomira SkrzypekAbstractThis research paper reports on preparation of glassy carbon electrodes (GCE) modified with different carbon nanomaterials, such as single–walled carbon nanotubes (SWCNTs), multi–walled carbon nanotubes (MWCNTs), graphene functionalized using carboxylic groups (fG), and carbon nanohorns (CNHs). Topographical and electrochemical characterization of fabricated electrochemical sensors was performed by atomic force microscopy, electrochemica...
Source: Journal of Electroanalytical Chemistry - July 9, 2019 Category: Chemistry Source Type: research

Electroreduction of oxygen on Nafion®-coated thin platinum films in acid media
Publication date: Available online 9 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Ave Sarapuu, Sajid Hussain, Aarne Kasikov, Bruno G. Pollet, Kaido TammeveskiAbstractElectrocatalytic oxygen reduction reaction (ORR) kinetics on vacuum-evaporated thin platinum films in sulfuric acid solution is thoroughly investigated employing the rotating disc electrode (RDE) method. The nominal thickness of the Pt films is varied from 0.25 to 20 nm and the effect of applied Nafion® layer on the ORR activity in 0.5 M H2SO4 solution is evaluated. The electroactive surface area of Pt and the corresponding overall...
Source: Journal of Electroanalytical Chemistry - July 9, 2019 Category: Chemistry Source Type: research

Electrochemical behavior of hexahydrofarnesol: A contaminant of aviation biokerosene
Publication date: Available online 9 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Edervaldo Buffon, Nelson Ramos StradiottoAbstractHexahydrofarnesol is the main contaminant of the aviation biokerosene and its determination is of great interest to the aviation industry. In this work, the electrochemical behavior of this contaminant was investigated for the first time. The results showed that the electrooxidation of hexahydrofarnesol is controlled by diffusion and occurs irreversibly at 1.65 V vs. Ag/AgCl (3.0 mol L−1 KCl); this process involves the adsorption of the oxidation product on the ...
Source: Journal of Electroanalytical Chemistry - July 9, 2019 Category: Chemistry Source Type: research

Homology and isomerism effect of aromatic imides as organic anode materials of lithium-ion batteries
Publication date: Available online 9 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Huan Liu, Yaru Wang, Huijun Liu, Yuhua Sun, Shiyou GuanAbstractOrganic materials have been promising materials for “greener and sustainable” lithium-ion batteries due to lightweight, low cost, flexibility, alternative molecular engineering. Six kinds of aromatic imides with different aromatic and aliphatic diamines based on 3,3′,4,4′-benzophenonetetracarboxylic dianhydride (BTDA) were designed, synthesized and studied as anode materials in rechargeable lithium-ion batteries in this work. Compared w...
Source: Journal of Electroanalytical Chemistry - July 9, 2019 Category: Chemistry Source Type: research

Shape-controlled F-doped TiO2 nanocrystals for Mg-ion batteries
Publication date: Available online 9 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Thanh Son Le, Thu H. Hoa, Duc Q. TruongAbstractWe study the effect of F aliovalent doping into TiO2 nanocrystals to the electrode performance in magnesium ion battery. The shaped/morphological tuning of F-doped anatase TiO2 nanocrystals with exposed {001} and {101} facets was done to optimize the structural features to improve electrochemical properties in Mg-ion battery. The experiment results show the preferable intercalation of Mg2+ ion into F-doped anatase TiO2 compared to pure TiO2. The Mg-ion storage properties were...
Source: Journal of Electroanalytical Chemistry - July 9, 2019 Category: Chemistry Source Type: research

Construction of a voltammetric sensor based on MIL-101 hollow cages for electrocatalytic oxidation and sensitive determination of nitrofurazone
Publication date: Available online 8 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Tian Gan, Jiebin Li, Liping Xu, Yaxian Yao, Yanming LiuAbstractAntibiotic pollution as a hot issue of global concern is extraordinarily sought after due to the deleterious consequences on ecosystems and human health from the excessive utilization and deficient management. Achieving determination of antibiotics residues in food is greatly crucial but remains challenging. In this work, a rational strategy was employed to fabricate chromium (III) terephthalate MOF (MIL-101) hierarchical hollow cages through crystal growth an...
Source: Journal of Electroanalytical Chemistry - July 9, 2019 Category: Chemistry Source Type: research

Effect of La doping level on structural and sensing properties of LZO/RGO nanohybrid: Highly selective sensing platform for isoprenaline determinations in the presence of ascorbic acid, uric acid and folic acid
Publication date: Available online 6 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): N. Dhanalakshmi, T. Priya, S. Thennarasu, V. Karthikeyan, N. ThinakaranAbstractAn electrochemical sensor using 3% lanthanum doped zinc oxide with reduced graphene oxide (3% LZO/RGO) nonohybrid was developed for the selective and sensitive determination of isoprenaline. The LZO (La = 0–5%) was synthesized by low temperature hydrothermal method. The structural and morphological changes were characterized by a variety of analytical and spectroscopy techniques, viz. X-Ray Diffraction, Fourier Transform Infrared Spec...
Source: Journal of Electroanalytical Chemistry - July 7, 2019 Category: Chemistry Source Type: research

Poly 3,4-ethylenedioxythiophene and zirconia nanoparticles composite modified sensor for methyl parathion determination
Publication date: Available online 6 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Houhuang Zhou, Chenhuinan Wei, Ju Fang, Likang Fu, Gang Liu, Qiming LiuAbstractPoly 3,4-ethylenedioxythiophene (PEDOT) membrane and zirconia nanoparticles (ZrO2 NPs) were directly prepared on ITO electrode successively through simple strategies. The ZrO2 NPs-chitosan/PEDOT/ITO electrode was employed as a disposal electrochemical sensor for methyl parathion (MP) detection. The structure characteristics,adsorption characteristics and electrochemical features of electrode were characterized by the SEM, XRD, UV–vis sp...
Source: Journal of Electroanalytical Chemistry - July 7, 2019 Category: Chemistry Source Type: research

Non-toxic poly(vinyl alcohol)/clay composites as electrode material for detection of 4-chlorophenol and 4-nitrophenol
Publication date: Available online 5 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Sanja Marinović, Tihana Mudrinić, Nataša Jović-Jovičić, Marija Ajduković, Aleksandra Milutinović–Nikolić, Predrag Banković, Zorica MojovićAbstractDevelopment of new electrode materials is necessary for the fabrication of sensors with low detection limits, high sensitivity and broad concentration range. Beside analytical parameters, the ability to replace rare and expensive metals, without additional pollution, is also expected from new materials. Materials based on non-toxic raw materials are presen...
Source: Journal of Electroanalytical Chemistry - July 7, 2019 Category: Chemistry Source Type: research

A green method for the synthesis of novel spiro compounds: Enhancement of antibacterial properties of caffeic acid through electrooxidation in the presence of barbituric acid derivatives
Publication date: Available online 6 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Narges Pakravan, Hassan Shayani-Jam, Hadi Beiginejad, Hadis Tavafi, Shadi PazireshAbstractIn this work, the novel Spiro cycles with high potential antibacterial activity were synthesized via a one-pot and environmentally friendly electrochemical approach, without toxic reagents and solvents. In the first, electrochemical oxidation of caffeic acid (1) in the presence of barbituric acids (3a-c) as nucleophiles have been studied using cyclic voltammetry and controlled-potential coulometry. The obtained electrochemical result...
Source: Journal of Electroanalytical Chemistry - July 7, 2019 Category: Chemistry Source Type: research

Advantages of asymmetric over symmetric electrodes made of mild steel for measurements of electrochemical current noise
Publication date: Available online 6 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): R. Naghizade, G.h.S. Sajadi, M. Shahidi, S.M.A. HosseiniAbstractThe symmetric and asymmetric electrodes made of mild steel were investigated in 4000 ppm NaCl + 1000 ppm NaNO2 solution at different pH values (4, 6, 8 and 10). The obtained electrochemical current noise (ECN) signals were analyzed by statistical and wavelet techniques. The results indicated that the asymmetric electrodes were more suitable than symmetric electrodes for the ECN measurements in near-neutral and alkaline solutions. The asymmetric config...
Source: Journal of Electroanalytical Chemistry - July 7, 2019 Category: Chemistry Source Type: research

Electrochemical analysis of co-deposition cobalt and selenium
Publication date: Available online 4 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Anna Maria Kwiecińska, Dawid Kutyła, Karolina Kołczyk-Siedlecka, Katarzyna Skibińska, Piotr Żabiński, Remigiusz KowalikAbstractThe work describes the process of electrochemical synthesis of cobalt selenide from aqueous solutions. The mechanism of co-deposition of selenium with cobalt was examined with the method of the cyclic voltammetry and rotating disk electrode. The tests were conducted in acid solutions of pH = 2 applying different concentrations of cobalt(II) sulphate(VI) and selenous acid(IV). On the basi...
Source: Journal of Electroanalytical Chemistry - July 6, 2019 Category: Chemistry Source Type: research

Mechanisms of alamethicin ion channel inhibition by amiloride in zwitterionic tethered lipid bilayers
Publication date: Available online 5 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): ZhangFei Su, Fatemeh Abbasi, J. Jay Leitch, Robert J. Faragher, Adrian L. Schwan, Jacek LipkowskiAbstractThe effect of amiloride, an acid-sensing ion channel (ASIC) blocker, on the formation of alamethicin ion channels in tethered zwitterionic phospholipid bilayers was investigated using electrochemical impedance spectroscopy (EIS) and polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS). EIS measurements show a decrease in conductivity indicating that ion transported across the alamethicin-rich ...
Source: Journal of Electroanalytical Chemistry - July 6, 2019 Category: Chemistry Source Type: research

Synthesis and adsorption behavior of dendritic Fibrous Nanosilica (DFNS) grafted by d-penicillamine for the removal of metal ions using electrochemical techniques
Publication date: Available online 3 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Maryam Mahmudi, Nasrin Shadjou, Mohammad HasanzadehAbstractIn this work, d-penicillamine-modified dendritic Fibrous Nanosilica grafted by amine groups (dPA-DFNS-NH2) have been successfully synthesized which CTAB was used as a template. Surface area, average pore size, and pore volume of dPA-DFNS-NH2 was determined by BET/BJH analysis which were 78.2 m2 g−1, 6.7 nm, and 0.13 cm3 g−1. After the functionalization of DFNS-NH2 by dPA, the adsorption behavior of the dPA-DFNS-NH2 for Co2+, Ni2+, Ag+, and Pb2+...
Source: Journal of Electroanalytical Chemistry - July 4, 2019 Category: Chemistry Source Type: research

Degradation of aniline by photoelectro-Fenton process using g-C3N4 based cathode
Publication date: Available online 3 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Bin Ou, Jixiao Wang, Ying Wu, Song Zhao, Zhi WangAbstractA new electrode for photoelectro-Fenton (PEF) process was fabricated by electrochemical deposition of g-C3N4 on the surface of graphite felt (GF). The modified electrode was characterized by scanning electron microscope, contact angle, X-ray photoelectron spectroscopy, cyclic voltammetry and current-time curves, the morphology and surface physicochemical properties after the electrochemical modification were obviously changed. The g-C3N4/GF electrode shows good elec...
Source: Journal of Electroanalytical Chemistry - July 4, 2019 Category: Chemistry Source Type: research

Comparison of the free-standing flexible electrodes fabricated with metallic 1T or semiconducting 2H MoS2 nanosheets and high conductivity PEDOT:PSS
Publication date: Available online 3 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Yuanchao Lu, Qunqing Yang, Hui Wu, Jian Wu, Jun LiuAbstractThe improvement and promotion of the active materials in supercapacitors (SCs) have been gotten a lot of attention with the emergency awareness of environment protection and energy crisis. Herein, a free-standing flexible film was developed as the active electrodes of SCs, fabricated by mixing 1 T or 2H MoS2 nanosheets with high electric conductivity poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) via vacuum filtration and H2SO4 post-treatme...
Source: Journal of Electroanalytical Chemistry - July 4, 2019 Category: Chemistry Source Type: research

Recent progress of Pt-based catalysts for oxygen reduction reaction in preparation strategies and catalyst mechanism
Publication date: Available online 2 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Shijie Yi, Hao Jiang, Xinjun Bao, Saiqun Zou, Jingjing Liao, Zejie ZhangAbstractIt goes without saying that the oxygen reduction reaction (ORR) on Pt-based catalyst is one of the most significant cathode reactions in fuel cells. Although high price and low stability, Pt-based catalyst still enjoys its widespread researches for its relatively high activity. Recently, there has been some impressive progress in strategies like alloying, single atoms, morphology and component regulation. This paper aims to introduce the prepa...
Source: Journal of Electroanalytical Chemistry - July 3, 2019 Category: Chemistry Source Type: research

Polyvinyl butyral/graphene oxide nanocomposite modified electrode for the integrate determination of terminal metabolites of catecholamines in human urine
Publication date: Available online 2 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Yijun Ruan, Peiying Shi, Yun Lei, Shaohuang Weng, Shaoguang Li, Liying Huang, Xinhua Lin, Hong YaoAbstractWe for the first time reported the development of an electrochemical sensor with polyvinyl butyral/graphene oxide (PVB/GO) nanocomposite film for the integrate determination of major terminal metabolites of catecholamines. The PVB/GO nanocomposite modified electrode was characterized by ATR-FTIR spectroscopy, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), scanning probe microscopy (SPM...
Source: Journal of Electroanalytical Chemistry - July 3, 2019 Category: Chemistry Source Type: research

Nitrogen-doped porous carbon sponge-confined ZnO quantum dots for metal collector-free lithium ion battery
Publication date: Available online 3 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Xu Ma, Zeheng Li, Danke Chen, Zhuoyi Li, Lijing Yan, Siyuan Li, Chengdu Liang, Min Ling, Xinsheng PengAbstractZnO is one of the promising anode materials for lithium ion batteries (LIBs) due to its high theoretical capacity (978 mAh g−1) and abundant geology reserves. However, the volume variation (about 221%) during de/lithiation and poor conductivity restrict its development. To relieve the volume variation, we build a flexible sponge film, which is composed of single-walled carbon nanotubes (SWCNT) and N-doped po...
Source: Journal of Electroanalytical Chemistry - July 3, 2019 Category: Chemistry Source Type: research

Synthesis and characterization of D-A type conjugated electrochromic polymers with cross-linked structure employing a novel and multi-functionalized molecular as the acceptor unit
In this study, three novel conjugated electrochromic copolymers including PIPE-1, PIPE-2 and PIPE-3 were successfully synthesized via Stille coupling reaction. In the synthetic process, a novel and multifunctionalized electron functional unit 5,8,14,17-tetrabromoquinoxaline [2′,3′:9,10]phenanthrene[4,5-abc]phenazine (M2) was selected as the acceptor unit, 6,8-dibromo-3,3-bis-decyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine (M1, brominated ProDOT-decyl2) and bis(trimethylstannane) functionalized indacenodithiophene (M3) as donor units. Cyclic voltammetry (CV), X-ray photoelectron spectroscopy (XPS), spectroelect...
Source: Journal of Electroanalytical Chemistry - July 3, 2019 Category: Chemistry Source Type: research

An efficient platform for the electrooxidation of formaldehyde based on amorphous NiWO4 nanoparticles modified electrode for fuel cells
Publication date: Available online 1 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Sahar Daemi, Monire Moalem-Banhangi, Shahram Ghasemi, Ali Akbar AshkarranAbstractWe prepared a binary transition metal oxide material of nickel tungstate nanoparticles (NiWO4-NPs) through a simple co-precipitation method. The synthesized NPs were characterized using field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and electrochemical impedance spectroscopy (EIS) techniques. NiWO4-NPs represent nearly spherical ...
Source: Journal of Electroanalytical Chemistry - July 1, 2019 Category: Chemistry Source Type: research

A new signal-on photoelectrochemical sensor for glutathione monitoring based on polythiophene/graphitic carbon nitride coated titanium oxide nanotube arrays
Publication date: Available online 1 July 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Afrooz Akbari, Majid Arvand, Shiva HemmatiAbstractA novel strategy was proposed here for fabrication of highly sensitive photoelectrochemical (PEC) sensor with prominent characteristics based on multifunctional photoactive materials and applied for ultrasensitive detection of glutathione (GSH) without additional catalysts. At first, growth of graphitic carbon nitride (g-C3N4) thin film on vertically aligned TiO2 nanotube arrays (TiO2-NTs) was achieved via facile thermal treatment of anodized Ti sheets over melamine which ...
Source: Journal of Electroanalytical Chemistry - July 1, 2019 Category: Chemistry Source Type: research

Using square wave voltammetry for the electrochemical characterization of cerium oxide/multiwalled carbon nanotube composites in different aqueous electrolytes
Publication date: Available online 28 June 2019Source: Journal of Electroanalytical ChemistryAuthor(s): M. Enterría, A.G. Gonçalves, M.F.R. Pereira, J.I. Martins, J.L. FigueiredoAbstractTwo CeO2/carbon nanotube composites were prepared in both basic and neutral medium thus using different deposition procedures of the cerium oxide. The modification of the synthesis conditions varied the hydrolysis rate of the cerium oxide precursor, leading to materials with different morphology, texture and surface chemistry, significantly changing their electrochemical performance. The different mechanisms of charge storage ...
Source: Journal of Electroanalytical Chemistry - June 30, 2019 Category: Chemistry Source Type: research

Facile synthesis and electrochemical performances of activated bamboo charcoal supported MoS2 nanoflakes as anodes materials for lithium-ion batteries
Publication date: Available online 27 June 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Yonghang Xu, Congcong Zhang, Shaojie Kuang, Kai Zhao, Min Chen, Donghui Xu, Wenyan Chen, Xiaoyuan YuAbstractBamboo charcoal (BC) has a natural hierarchical porous three-dimensional network structure and good electrical conductivity. Herein, MoS2 nanoflakes supported by modified bamboo charcoal (MBC) have been prepared via a facile hydrothermal method using ammonium molybdate. SEM observations show that appropriate MoS2 nanoflakes are uniformly dispersed on the porous MBC. In addition, the hybrids exhibit good lithium sto...
Source: Journal of Electroanalytical Chemistry - June 28, 2019 Category: Chemistry Source Type: research

Highly stable reduced graphene oxide-encapsulated Ce-MOF composite as sensing material for electrochemically detecting dichlorophen
Publication date: Available online 28 June 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Xiaolong Tu, Yu Xie, Xue Ma, Lei Gong, Dingwen Wang, Limin Lu, Guangbin Liu, Yongfang Yu, Xigen HuangAbstractMetal–organic frameworks (MOFs) as porous materials have been widely used in electrochemical sensing field. Unfortunately, their low electrical conductivity and poor stability in the aqueous solution limit their application. To overcome these shortcomings, in this study, a novel reduced graphene oxide-encapsulated Ce-MOF (Ce-MOF@RGO) composite was synthesized by using a simple and green method. Ce-MOF and GO...
Source: Journal of Electroanalytical Chemistry - June 28, 2019 Category: Chemistry Source Type: research

Design of counter oxidation vs. CO2 electroreduction for efficient formate production on a tin cathode
This study puts forward another insight for cost-effective CO2 electroreduction, which are of great value in enhancing balance between energy input and output during CO2 utilization, thus having implication in enriching strategy within electroreduction field.Graphical abstract (Source: Journal of Electroanalytical Chemistry)
Source: Journal of Electroanalytical Chemistry - June 28, 2019 Category: Chemistry Source Type: research

Label-free electrochemiluminescent immunosensor for prostate specific antigen ultrasensitive detection based on novel luminophore Ag3PO4 decorated GO
Publication date: Available online 28 June 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Malik Saddam Khan, Hafsa Ameer, Asghar Ali, Wenjuan Zhu, Xiaojian Li, Lei Yang, Huan Wang, Ruiqing Feng, Qin WeiAbstractA label-free electrochemiluminescence (ECL) sensor having high sensitivity was operated for detection of prostate specific antigen (PSA) by using silver/silver orthophosphate/graphene oxide composites (Ag/Ag3PO4/GO) as antibody carriers and sensing platform. Firstly, nanoparticles of Ag3PO4 were employed as luminescent materials for solid-state ECL detection and to propose possible luminescence route in...
Source: Journal of Electroanalytical Chemistry - June 28, 2019 Category: Chemistry Source Type: research

The influence of mesopore size distributions on the electrochemical activity and two-electron selectivity of the oxygen reduction reaction in nitrogen-doped and CoOx-loaded activated carbon
In this study, as catalysts for the ORR, two kinds of activated carbon (AC) with different mesopore size distributions are modified by nitrogen (N)-doping and cobalt oxide (CoOx)-loading treatment. It can be concluded that pyridinic-N and pyrrolic-N (48.94%) are more easily formed on the AC with narrow mesopore size distributions (AC-1, 2–5 nm), however, graphite-N (63.9%) are more easily formed on the AC with broad mesopore size distributions (AC-2, 5–15 nm). Furthermore, Co3O4 and CoO is the predominant crystal loaded onto the modified AC-1 and modified AC-2, respectively. The modified AC-1 has an extreme...
Source: Journal of Electroanalytical Chemistry - June 27, 2019 Category: Chemistry Source Type: research

Tuning molecular energy levels and band gap of two-dimensional benzo[1,2-b:4,5-b′] dithiophene and quinoxaline bearing polymers
Publication date: Available online 26 June 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Mustafa Yasa, Seza Goker, Yasemin Arslan Udum, Levent ToppareAbstractTwo novel donor-acceptor (D-A)-type two-dimensional (2-D) polymers of PBDTSeQ (P1) and PBDTFQ (P2) were synthesized and characterized where 4,8-bis[5-(2-ethylhexyl) thiophen-2-yl] benzo[1,2-b:4,5-b'] dithiophene (BDT) was used as the donor unit. 2,3-Bis(3,4-bis(octyloxy)phenyl)-5,8-dibromoquinoxaline was used as the acceptor moiety and selenophene and furan were utilized as π bridges. Optoelectronic properties of the polymers were examined by electro...
Source: Journal of Electroanalytical Chemistry - June 27, 2019 Category: Chemistry Source Type: research

A comparative study of carboxylic acid and benzimidazole phthalocyanines and their surface modification for dopamine sensing
Publication date: Available online 25 June 2019Source: Journal of Electroanalytical ChemistryAuthor(s): C.P. Keshavananda Prabhu, Manjunatha Nemakal, Shambhulinga Aralekallu, Imadadulla Mohammed, Manjunatha Palanna, Veeresh A. Sajjan, D. Akshitha, Lokesh Koodlur SannegowdaAbstractNovel iron tetrabenzimidazole phthalocyanine (FeTBImPc) was synthesized from iron tetracarboxylicacid phthalocyanine (FeTCAPc) in pure state with good yield. The synthesized complexes were characterized with analytical and spectroscopic methods such as elemental analysis, UV–Visible, IR spectroscopy, mass, PXRD, TGA and cyclic voltammetry. T...
Source: Journal of Electroanalytical Chemistry - June 27, 2019 Category: Chemistry Source Type: research

Trace-level determination of amlodipine besylate by immobilization of palladium-silver bi-metallic nanoparticles on reduced graphene oxide as an electrochemical sensor in biological and pharmaceutical samples
Publication date: Available online 24 June 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Chougoni Madhuri, Y. Veera ManoharaReddy, S.V. PrabhakarVattikuti, Ľubomír Švorc, Jaesool Shim, G. MadhaviAbstractBi-metallic PdAg was homogeneously dispersed on reduced graphene oxide (rGO) nanosheets and was synthesized by reducing ethylene glycol. Pd-Ag/rGO nanocomposite was fabricated on GCE using a drop-casting method for sensing of amlodipine and was characterized using transmission electron microscopy (TEM) and energy-dispersive X-ray analysis (EDX). This nanocomposite exhibited excellent electrooxi...
Source: Journal of Electroanalytical Chemistry - June 25, 2019 Category: Chemistry Source Type: research

Nanocomposite of magnetic nanoparticles/graphene oxide decorated with acetic acid moieties on glassy carbon electrode: A facile method to detect nitrite concentration
Publication date: Available online 25 June 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Masoume Rostami, Gisya Abdi, Sayed Habib Kazemi, Abdolhamid AlizadehAbstractHerein, iron oxide magnetic nanoparticles/graphene oxide decorated with acetic acid moieties (Fe3O4/GO/COOH) was synthesized and applied to fabricate a novel nitrite sensor in aqueous solutions (Fe3O4/GO/COOH/GC electrode). Acetic acid moieties were incorporated through nucleophilic reaction of chloroacetic acid with hydroxyl or epoxy groups on the surface of graphene oxide. The morphologies and compositions of fabricated nanomaterials were chara...
Source: Journal of Electroanalytical Chemistry - June 25, 2019 Category: Chemistry Source Type: research

Electrochemical noise signals evaluation to classify the type of corrosion using Synchrosqueezing transform
Publication date: Available online 25 June 2019Source: Journal of Electroanalytical ChemistryAuthor(s): J.H. Arellano-Pérez, R.F. Escobar-Jiménez, D. Granados-Lieberman, J.F. Gómez-Aguilar, J. Uruchurtu-Chavarín, V.M. Alvarado-MartínezAbstractIn this research, the corrosion type evaluation on the 6061-T6 aluminum alloy exposed to three different solutions using the Electrochemical Noise (EN) technique evaluated by the Synchrosqueezing Transform (SST), and the Shannon energy (SSE) methods is presented. The solutions used for the tests were Sulfuric Acid (15% H2SO4), Sodium Chloride (3.5% N...
Source: Journal of Electroanalytical Chemistry - June 25, 2019 Category: Chemistry Source Type: research

Large amplitude ac voltammetry: Chief observables for a reversible reaction of free electroactive species
Publication date: Available online 25 June 2019Source: Journal of Electroanalytical ChemistryAuthor(s): D. Zouraris, A. KarantonisAbstractIn the present work, the chief observables, i.e. peak height, peak width and peak potential of the principal peaks, are determined for the case of large amplitude ac-voltammetry (LA-FTacV) of a reversible reaction of free electroactive species. The values of the chief observables are derived from a semi-analytic solution as well as from the solution of the full initial-boundary value problem. A condition under which the large amplitude ac-voltammogram is independent of scan rate, up to t...
Source: Journal of Electroanalytical Chemistry - June 25, 2019 Category: Chemistry Source Type: research

Theory of microscopic electrodeposition under a uniform parallel magnetic field - 2. Suppression of 3D nucleation by micro-MHD flow
Publication date: Available online 22 June 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Ryoichi Morimoto, Miki Miura, Atsushi Sugiyama, Makoto Miura, Yoshinobu Oshikiri, Iwao Mogi, Satoshi Takagi, Yusuke Yamauchi, Ryoichi AogakiAbstractIn electrodeposition under a uniform parallel magnetic field, the suppression of three-dimensional (3D) nucleation by microscopic magnetohydrodynamic flow (micro-MHD flow) and formation of stream pattern of macroscopic MHD flow by the multiple nucleation of 3D nuclei are theoretically clarified. The interference of micro-MHD flow with concentration fluctuation generally resul...
Source: Journal of Electroanalytical Chemistry - June 24, 2019 Category: Chemistry Source Type: research

Electrochemical nucleation and growth of Zn-Ni alloys from chloride citrate-based electrolyte
Publication date: Available online 24 June 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Rabah Asseli, Mohamed Benaicha, Sabrine Derbal, Mahdi Allam, Oualid DilmiAbstractIn this work, the effects of deposition potential, [Ni2+]/[Zn2+] molar ratio, pH and bath temperature on the electrocrystallization mechanism of ZnNi alloy from an aqueous solution containing zinc chloride (ZnCl2), nickel chloride (NiCl2) and tri‑sodium citrate as complexing agent were studied. The Zn–Ni alloys were deposited from solutions with different molar ratios (0.25; 1; 2; 4), pHs (1.5; 3; 4) and bath temperatures (20; 40; 60...
Source: Journal of Electroanalytical Chemistry - June 24, 2019 Category: Chemistry Source Type: research

Power output of Prussian Blue based (bio)sensors as a function of analyte concentration: Towards wake-up signaling systems
Publication date: Available online 24 June 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Maria A. Komkova, Arkady A. Karyakin, Egor A. AndreevAbstractSelf-powered sensors are among promising candidates for wake-up device elaboration. Generally, such sensors are designed to generate superior energy output to the detriment of analytical performance. Here we report on power output of Prussian Blue (PB) based (bio)sensors retaining advanced analytical performance in power generation mode. The maximum power density is linearly proportional to analyte concentration: the slopes for hydrogen peroxide sensor and gluc...
Source: Journal of Electroanalytical Chemistry - June 24, 2019 Category: Chemistry Source Type: research

Nivolumab anticancer monoclonal antibody native and denatured direct electrochemistry at a glassy carbon electrode
Publication date: Available online 21 June 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Wesley B.S. Machini, Nuno V. Marques, Ana Maria Oliveira-BrettAbstractNivolumab (NIVO) is a recombinant humanized monoclonal antibody used in the immunotherapeutic treatment of cancer. The electrochemical oxidation of native NIVO, in solution and adsorbed on a glassy carbon electrode, using differential pulse voltammetry, showed two pH-dependent oxidation peaks, the first one corresponding to the cysteine amino acid residues, and the second one corresponding to the tyrosine and tryptophan amino acid residues. The interfa...
Source: Journal of Electroanalytical Chemistry - June 22, 2019 Category: Chemistry Source Type: research

Label-free electrochemical analysis of purine nucleotides and nucleobases at disposable carbon electrodes in microliter volumes
Publication date: Available online 21 June 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Stanislav Hasoň, Miroslav Fojta, Veronika OstatnáAbstractWe analyzed purine nucleotides in oligodeoxynucleotides (ODN) and nucleobase residues acid-hydrolyzed ODN at nanomolar concentrations in few tens of microliters of solution at commercially available unmodified graphite pencil electrodes, screen printed graphite electrodes (SPGEs) and SPGEs modified by graphene, single- and multi-walled carbon nanotubes. Our results suggest that specific properties of different graphite-based electrodes have significant impa...
Source: Journal of Electroanalytical Chemistry - June 22, 2019 Category: Chemistry Source Type: research