Enhanced electrocatalytic performance of CoCu-MOF/polyaniline for glycerol oxidation

Publication date: Available online 10 December 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Shichao Zhu, Aijuan Xie, Xiang Tao, Jianghui Zhang, Bingyan Wei, Zhongxiang Liu, Yuwei Tao, Shiping LuoAbstractThe novel CoCu metal-organic framework (CoCu-MOF) precursor and CoCu-MOF/polyaniline (CoCu-MOF/PANI) electrode materials were synthesized by hydrothermal method and in situ polymerization, respectively. The as-synthesized CoCu-MOF/PANI and corresponding composite were first tested for their electrocatalytic performance towards glycerol oxidation in KOH solution and then the selection and optimization were further carried out for the CoCu-MOF/PANI composite. The preferred material was subjected to a group of electrochemical performance tests such as cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), Tafel, and chronoamperometry. The results show that among the various electrode materials, the as-synthesized CoCu-MOF1/PANI1 hybrid exhibits enhanced electrocatalytic activity at the scanning speed of 100 mV s−1. EIS test manifests that the CoCu-MOF1/PANI1 has the lower impedance. Tafel test reveals that CoCu-MOF1/PANI1 is beneficial to increase the oxidation rate of glycerol. Chronoamperometry and CO stripping declare CoCu-MOF1/PANI1 has better stability and CO anti-poisoning relative to commercial Pt/C (20 wt%)-SA. The enhancement of electrochemical properties, stability and CO resistance is ascribed to the synergetic effect of CoCu...
Source: Journal of Electroanalytical Chemistry - Category: Chemistry Source Type: research

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Publication date: 15 April 2020Source: Scripta Materialia, Volume 180Author(s): Jinxian Huang, Lei Feng, Cong Li, Chunfa Huang, Jianguo Li, Bernd FriedrichAbstractA poisoning effect of scandium (Sc) with respect to Al-5Ti-1B (in wt.%) grain refiner was investigated for the first time. Grain refinement effect of Al-5Ti-1B was found to fade in Al alloys with content of trace Sc. The modification of TiB2 particle by inward diffusion of Sc was characterized by high-resolution transmission electron microscope (HRTEM). Through Geometric Phase Analysis (GPA) analysis, a notable increase of stress concentration at (0001) plane of ...
Source: Scripta Materialia - Category: Materials Science Source Type: research
In this study, we report the observation that the diffusion-limited current (DLC) of hydrogen evolution reaction (HER) on Pt surface is largely surface poison-resisting to carbon monoxide and thiol, two well-known Pt surface poisons. Building upon this observation, we proposed and tested a technique for amperometrically measuring localized proton concentration with a sub-μm spatial resolution through the utilization of a linear pH dependence of HER DLC on a Pt ultramicroelectrode, hereby referred to as Scanning Amperometric Proton Microscopy (SAPM). By bringing the Pt ultramicroelectrode close to a proton generating/con...
Source: Journal of Electroanalytical Chemistry - Category: Chemistry Source Type: research
In this study, for the first time, we reported a fast and facile three-step in situ strategy for direct controllable growth of the Co3(BTC)2 MOFs thin films on the GCE, through the rapid conversion of the electrodeposited Co(OH)2 nano-flakes on rGO/GCE, to crystalline rectangular bar-shape structures of MOFs. X-ray diffraction spectroscopy, Fourier transform infrared spectroscopy, field emission scanning electron microscopy, energy dispersive X-ray spectroscopy and elemental mapping analysis used to the structural and morphological characterization of the well-synthesized MOFs. The as-prepared Co3(BTC)2 MOFs were used to c...
Source: Talanta - Category: Chemistry Authors: Tags: Talanta Source Type: research
ACS Medicinal Chemistry LettersDOI: 10.1021/acsmedchemlett.9b00586
Source: ACS Medicinal Chemistry Letters - Category: Chemistry Authors: Source Type: research
Publication date: Available online 5 January 2020Source: Chinese Chemical LettersAuthor(s): Xiaoyu Zhao, Huachao Zhao, Jiefang Sun, Gang Li, Rui LiuAbstractAnodic electrocatalyst plays the core role in direct alcohol fuel cells (DAFCs), while traditional Pt-catalysts suffer from limited catalytic activity, high over potential and severe CO poisoning. Herein, by selectively depositing Rh atoms on the defective-sites of Pt nanowires (NWs), we developed a new Pt@Rh NW electrocatalyst that exhibited enhanced electrocatalytic performance for both methanol oxidation (MOR) and ethanol oxidation (EOR). Both cyclic voltammetry (CV)...
Source: Chinese Chemical Letters - Category: Chemistry Source Type: research
CONCLUSION: This result provided an important epidemiological view about the contamination rate and the most prevalent virulence genes of B. cereus in milk products in Egypt. PMID: 31944080 [PubMed - in process]
Source: Pakistan Journal of Biological Sciences: PJBS - Category: Biomedical Science Authors: Tags: Pak J Biol Sci Source Type: research
Conclusions: DUIMS indicates higher mortality, and DUIMS' profiles in causes of death differ from the general population. Elevated risk for, for instance, suicidal, accidental and violent death among those using multiple substances highlights the need to also pay attention to causes of death other than poisoning/overdose. PMID: 31856686 [PubMed - as supplied by publisher]
Source: Scandinavian Journal of Public Health - Category: International Medicine & Public Health Authors: Tags: Scand J Public Health Source Type: research
[Abstract unavailable] Language: en...
Source: SafetyLit - Category: International Medicine & Public Health Tags: Home and Consumer Product Safety Source Type: news
Authors: Montrucchio G, Bosso S, Scanu M, Mina A, Imeneo MR, Brazzi L PMID: 31818086 [PubMed - as supplied by publisher]
Source: Minerva Anestesiologica - Category: Anesthesiology Tags: Minerva Anestesiol Source Type: research
Publication date: Available online 18 November 2019Source: Arabian Journal of ChemistryAuthor(s): Islam M. Al-Akraa, Ahmad M. MohammadAbstractThe CO poisoning of the platinum anodic catalyst which typically functions the catalytic deterioration of the direct formic acid fuel cells could be minimized with a simple modification for Pt with titanium oxide. The fabrication scheme involved the spin-coating of a Ti precursor onto a Pt thin layer that was physically sputtered onto a Si substrate. The whole assembly was subjected to a post-annealing processing to produce the TiOx layer (60 nm) in a porous structure (mostly Anatase...
Source: Arabian Journal of Chemistry - Category: Chemistry Source Type: research
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