N-doping induced tensile-strained Pt nanoparticles ensuring an excellent durability of the oxygen reduction reaction
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Yunjie Xiong, Yunan Ma, Liangliang Zou, Shaobo Han, Hong Chen, Shuai Wang, Meng Gu, Yang Shen, Lipeng Zhang, Zhenhai Xia, Jun Li, Hui YangAbstractThe availability of highly active and durable Pt based catalysts at a high metal loading is a prerequisite for practical applications in proton exchange membrane fuel cells (PEMFCs). Herein, we for the first time report the simple surfactant- and polymer-free synthesis of nonmetallic N doped Pt nanoparticles as electrocatalysts with an enhanced activity and excellent durability for oxygen reduction ...
Source: Journal of Catalysis - January 11, 2020 Category: Chemistry Source Type: research

Phosphate stabilized PdCoP@Nifoam catalyst for self-pressurized H2 production from the electrochemical reforming of ethanol at 150 °C
We report a highly active ethanol oxidation catalyst (PdCoNifoam) composed of Pd nanoparticles supported on nanostructured Co oxide structures grown on nickel foam. Treatment with phosphorous vapors at high temperature yields a thin coating of phosphate that confers enhanced stability to the electrode operating in an electrolysis cell at 150 °C. A combination of scanning electron microscopy (energy dispersive X-ray spectroscopy) and X-ray photoelectron spectroscopy reveal a 3D nano-flake surface with an external layer of phosphates that prevents Pd dissolution. The PdCoP@Nifoam catalyst was successfully used for e...
Source: Journal of Catalysis - January 11, 2020 Category: Chemistry Source Type: research

Enhanced electrochemical hydrogen evolution performance of WS2 nanosheets by Te doping
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Yaping Pan, Fawei Zheng, Xixi Wang, Hongye Qin, Enzuo Liu, Junwei Sha, Naiqin Zhao, Ping Zhang, Liying MaAbstractHydrogen evolution reaction (HER) activities of WS2 can be improved by doping exotic atom to increase active sites on base plane and narrow the bandgap. However, most of these catalysts of exotic atom doped WS2 are composed of semiconductor and the electronegativity between atoms is similar, which do harm to tuning bandgap with a wide range and decreasing the value of free Gibbs energy (ΔGH) for hydrogen adsorption. Given tha...
Source: Journal of Catalysis - January 11, 2020 Category: Chemistry Source Type: research

In-situ stabilizing surface oxygen vacancies of TiO2 nanowire array photoelectrode by N-doped carbon dots for enhanced photoelectrocatalytic activities under visible light
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Shanpeng Li, Chunlei Liu, Ping Chen, Wenying Lv, Guoguang LiuAbstractOxygen vacancy was considered to act as electron scavengers, delaying electron-hole pair recombination for their critical impacts on the electronic-band structural modulation and optical absorption of a semiconductor. However, the generation and stabilization of oxygen vacancies (Vo) remains a considerable challenge. Herein, a N-doped carbon dots/Vo-rich TiO2 nanowire array (NCDs/TiO2 NA-Vo) photoelectrode with a stable oxygen vacancy layer in TiO2 energy band was constructe...
Source: Journal of Catalysis - January 11, 2020 Category: Chemistry Source Type: research

Decipher of the structure and surface chemistry in molybdenum phosphosulfide on electrochemical catalytic hydrogen evolution reaction
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Xiaolin Li, Xiao Hu Wang, Yao Nie, Bai Xiang Tao, Yu Xian Yang, Wan Hui Guo, Jialing Zhang, Zhao Cai, Yu Ling, Wen Liu, Hong Qun Luo, Nian Bing LiAbstractIt has been a fascinating and significant topic that how the chemical composition and surface structure of nanomaterials govern the catalytic performance. In this paper, we deliberately design molybdenum phosphosulfide nanoparticles anchored on the carbon nanotubes (CNTs) and systematically study the correlation between structure/surface composition and the electrochemical hydrogen evolution...
Source: Journal of Catalysis - January 11, 2020 Category: Chemistry Source Type: research

Synergic catalysis by a CuO-like phase and Cu0 for anaerobic dehydrogenation of 2,3-butanediol
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Enxian Yuan, Ping Ni, Wanli Zhuang, Ruiqi Jian, Panming JianAbstractThis paper describes an emerging synthetic route for acetoin production via the anaerobic dehydrogenation of 2,3-butanediol to give a deep understanding of the specific dehydrogenation behavior of diols. Cu/SBA-15-x-T prepared by the ammonia evaporation method was applied to the dehydrogenation of 2,3-butanediol. The results of XRD, FTIR, H2-TPR, XPS, and NH3-TPD characterization verified that the CuO-like phase, with a Cu2+O2− pair, existed in the form of -Si-O-Cu-O-Si...
Source: Journal of Catalysis - January 11, 2020 Category: Chemistry Source Type: research

CO oxidation over Pt/Cr1.3Fe0.7O3 catalysts: Enhanced activity on single Pt atom by H2O promotion
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Ting Wang, Jin-Yuan Xing, Ai-Ping Jia, Cen Tang, Yue-Juan Wang, Meng-Fei Luo, Ji-Qing LuAbstractA series of Pt/Cr1.3Fe0.7O3 catalysts were tested for CO oxidation, and the activities are improved by the presence of H2O. Such improvement is more significant on the single atom 0.2Pt/Cr1.3Fe0.7O3 than on the 2Pt/Cr1.3Fe0.7O3 containing Pt nanoparticles, with turnover frequencies of 0.396 and 0.094 s−1 at 60 °C under 1% CO + 1% O2 + 10% CO2 + 10% H2O, respectively. In-situ diffuse reflectance infr...
Source: Journal of Catalysis - January 8, 2020 Category: Chemistry Source Type: research

Operando NMR study on the effect of photon flux and wavelength on photocatalytic reforming of methanol
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Ran Zhang, Man Ye, Yi Ning Yang, Rong Huang, Xue Lu Wang, Ye-Feng YaoAbstractPhotocatalytic decomposition of water for hydrogen generation is a promising way to obtain clean energy sources, and photon flux together with photon energy play particularly important roles in photocatalytic reactions. However, a study of their effects under real conditions is still limited, thus leaving a gap in our understanding. Herein, an operando NMR technique was proposed to systematically study the effects of photon flux and photon energy on TiO2 and Pd/TiO2-...
Source: Journal of Catalysis - January 5, 2020 Category: Chemistry Source Type: research

Synthesis and characterization of tetrairidium clusters in the metal organic framework UiO-67: Catalyst for ethylene hydrogenation
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Dong Yang, Carlo Alberto Gaggioli, Edward Conley, Melike Babucci, Laura Gagliardi, Bruce C. GatesAbstractClusters that are well approximated as tetrairidium were synthesized from Ir(C2H4)2 complexes anchored to the Zr6O8 nodes of the metal organic framework (MOF) UiO-67 by treatment in H2 at 353 K. The conversion taking place within the porous MOF structure was monitored by infrared and X-ray absorption spectroscopies, which provide evidence of tetrairidium clusters formed from the mononuclear precursors. The supported clusters were tested ...
Source: Journal of Catalysis - January 5, 2020 Category: Chemistry Source Type: research

Bimetallic PdZn nanoparticles for oxygen reduction reaction in alkaline medium: The effects of surface structure
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Hongyu Yang, Kai Wang, Zhenghua Tang, Zhen Liu, Shaowei ChenAbstractDespite the recent advances in preparing high-efficiency and durable electrocatalysts for oxygen reduction reaction (ORR) toward fuel cell applications, there is still lacking of the understanding regarding the relationship between the electrocatalytic performance and the surface structure of the catalyst at atomic level. Herein, three PdZn bimetallic composites named as PdZn_Disordered, PdZn_Ordered and Pd@Zn_Core-shell (Pd: Zn = 1: 1) were prepared for ORR in alka...
Source: Journal of Catalysis - January 5, 2020 Category: Chemistry Source Type: research

Scalable preparation of stable and reusable silica supported palladium nanoparticles as catalysts for N-alkylation of amines with alcohols
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Ahmad S. Alshammari, Kishore Natte, Narayana V. Kalevaru, Abdulaziz Bagabas, Rajenahally V. JagadeeshAbstractThe development of nanoparticles-based heterogeneous catalysts continues to be of scientific and industrial interest for the advancement of sustainable chemical processes. Notably, up-scaling the production of catalysts to sustain unique structural features, activities and selectivities is highly important and remains challenging. Herein, we report the expedient synthesis of Pd-nanoparticles as amination catalysts by the reduction of s...
Source: Journal of Catalysis - January 3, 2020 Category: Chemistry Source Type: research

Copper (II) as catalyst for intramolecular cyclization and oxidation of (1,4-phenylene)bisguanidines to benzodiimidazole-diylidenes
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Angela Mesias-Salazar, Oleksandra S. Trofymchuk, Constantin G. Daniliuc, Antonio Antiñolo, Fernando Carrillo-Hermosilla, Fabiane M. Nachtigall, Leonardo S. Santos, René S. RojasAbstractA synthetically useful approach of catalytic intramolecular cyclization and oxidation of 2′,2′-(1,4-phenylene)bis(1,3-dialkyl)guanidines (Alkyl = isopropyl 1 or cyclohexyl 2) catalyzed by copper acetate in acetonitrile under air was studied by on line monitoring of the reaction by ESI-MS. All-important intermediates organic s...
Source: Journal of Catalysis - January 3, 2020 Category: Chemistry Source Type: research

Durable ruthenium oxide/ceria catalyst with ultralarge mesopores for low-temperature CO oxidation
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Albert A. Voskanyan, Chi-Kin Jenkin Tsui, Kwong-Yu ChanAbstractWith more stringent CO emission limits, the development of efficient and durable catalysts for low-temperature (
Source: Journal of Catalysis - January 3, 2020 Category: Chemistry Source Type: research

Editorial Board
Publication date: January 2020Source: Journal of Catalysis, Volume 381Author(s): (Source: Journal of Catalysis)
Source: Journal of Catalysis - January 1, 2020 Category: Chemistry Source Type: research

Graphical abstract TOC continued
Publication date: January 2020Source: Journal of Catalysis, Volume 381Author(s): (Source: Journal of Catalysis)
Source: Journal of Catalysis - January 1, 2020 Category: Chemistry Source Type: research

Graphical abstract TOC
Publication date: January 2020Source: Journal of Catalysis, Volume 381Author(s): (Source: Journal of Catalysis)
Source: Journal of Catalysis - January 1, 2020 Category: Chemistry Source Type: research

Facile hydrogenation of bicarbonate to formate in aqueous medium by highly stable nickel-azatrane complex
We report the direct hydrogenation of bicarbonate to formate using a water soluble nickel-azatrane complex. Catalysts 1–5, designed and synthesized, were screened for the hydrogenation of bicarbonate to formate in aqueous medium; the best TON of 121 was obtained for catalyst 4 at 120 °C (60 bar). Introduction of isopropyl (2) and methyl (3 and 4) groups in the coordination environment of the metal center enhances the production of formate. Further, the hydrogenation of bicarbonate with CO2 promoted the formate production for catalyst 4 with a TON of 92 (3 h). The use of green solvent and non-precio...
Source: Journal of Catalysis - January 1, 2020 Category: Chemistry Source Type: research

Probing into the multifunctional role of copper species and reaction pathway on copper-cerium-zirconium catalysts for CO2 hydrogenation to methanol using high pressure in situ DRIFTS
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Weiwei Wang, Zhenping Qu, Lixin Song, Qiang FuAbstractA series of ternary copper-cerium-zirconium catalysts containing two kinds of copper species, surface CuO and Cu-Ce-Zr solid solution, are prepared and studied for catalytic properties of CO2 hydrogenation to methanol. The copper-cerium- zirconium catalyst calcined at 450 °C (CCZ-450) is much more favorable for improving the nature of surface CuO species and forming Cu-Ce-Zr solid solution than others. The best catalytic behavior in terms of methanol selectivity (T =&nbs...
Source: Journal of Catalysis - January 1, 2020 Category: Chemistry Source Type: research

Promoting the performances of Ru on hierarchical TiO2 nanospheres exposed {0 0 1} facets in benzene semi-hydrogenation by manipulating the metal-support interfaces
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Lan Jiang, Gongbing ZhouAbstractWe devised ruthenium-based catalysts with hierarchical anatase TiO2 nanospheres (HATNs) constructed by ultrathin nanosheets (NSs) exposed different degrees of {0 0 1} facets as the supports for semi-hydrogenation of benzene (SHB) and boosted the performances by manipulating the metal-support interfaces (MSIs). With the aid of systematic characterizations, it is identified that appropriately prolonging the solvothermal time gave rise to an enhancement in TiO2 crystallinity and an increment in exposed d...
Source: Journal of Catalysis - December 31, 2019 Category: Chemistry Source Type: research

A salt induced gelatin crosslinking strategy to prepare Fe-N doped aligned porous carbon for efficient oxygen reduction reaction catalysts and high-performance supercapacitors
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Pengfei Tian, Yanhui Wang, Wei Li, Shiwei Song, Shuyu Zhou, Hongwei Gao, Hanqing Xu, Xueqing Tian, Jianbing ZangAbstractThe preparation of low-cost, high-efficiency and stable oxygen reduction reaction (ORR) catalysts is highly anticipated but remains a challenge. Herein, a novel strategy of CaCl2 solution inducing gelatin crosslinking and acting as aligned pore template was put forward for preparation of Fe-N doped aligned hierarchical porous carbon. Furthermore, the microtopography and length of aligned pore can be controlled by adding NaCl...
Source: Journal of Catalysis - December 31, 2019 Category: Chemistry Source Type: research

Investigations of FeCl3 adducted N-heterocyclic carbene complex as curing-delayed action catalyst for polyurethane polymerization
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Hyeon-Jun Noh, T. Sadhasivam, Mingu Han, Keundeuk Lee, Ju-Young Kim, Ho-Young JungAbstractA high performance of catalyst material for delaying polyurethane (PU) polymerization at room temperature and rapid PU polymerization at preferred temperature still remains a great challenge because of adverse activation. Herein, N-heterocyclic carbene (NHC)-FeCl3 complex catalyst is developed and optimized to control the PU polymerization. The effects of PU polymerization degree and reaction kinetic is remarkably altered by the NHC-FeCl3 catalyst. It is...
Source: Journal of Catalysis - December 29, 2019 Category: Chemistry Source Type: research

Bismuth chromate (Bi2CrO6): A promising semiconductor in photocatalysis
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Zizhen Li, Zisheng Zhang, Liang Wang, Xiangchao MengAbstractBismuth chromate, a semiconductor in the bismuth-based materials family, was successfully prepared in this work. This semiconductor exhibited high solar and visible-light responsivity, making it a promising candidate for photocatalysis under solar light. Compared to other two widely reported photocatalysts (i.e. Bi2WO6 and Bi2MoO6), Bi2CrO6 exhibited superiorities, including narrower band gap (2.00 eV), wider responsive wavelength range of the solar spectrum (up to 622 nm) ...
Source: Journal of Catalysis - December 29, 2019 Category: Chemistry Source Type: research

Cuδ+ active sites stabilization through Mott-Schottky effect for promoting highly efficient conversion of carbon monoxide into n-propanol
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Tianwei He, Gurpreet Kour, Xin Mao, Aijun DuAbstractThe conversion of carbon monoxide into value-added liquid alcohols has recently attracted considerable attention (Li et al., 2014; De Luna et al., 2018; Pang et al., 2019). However, the ongoing reports for novel catalysts possessing excellent efficiency are still rare due to the high barriers of the reactions involved in the upgradation of the carbon-chains. Cuδ+ sites have been found to promote multi-carbon products, whereas the long-term stability of Cuδ+ sites under reduction ...
Source: Journal of Catalysis - December 29, 2019 Category: Chemistry Source Type: research

On the reversible deactivation of cobalt ferrite spinel nanoparticles applied in selective 2-propanol oxidation
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Sven Anke, Tobias Falk, Georg Bendt, Ilya Sinev, Michael Hävecker, Hendrik Antoni, Ioannis Zegkinoglou, Hyosang Jeon, Axel Knop-Gericke, Robert Schlögl, Beatriz Roldan Cuenya, Stephan Schulz, Martin MuhlerAbstractCoFe2O4 nanoparticles (NPs) were synthesized by using a colloidal one-pot synthesis method based on the decomposition of metal acetylacetonates in the presence of oleyl amine. The characterization by X-ray diffraction, transmission electron microscopy and N2 physisorption revealed non-porous spinel phase CoFe2O4 NPs wi...
Source: Journal of Catalysis - December 29, 2019 Category: Chemistry Source Type: research

Efficient electrochemical reduction of CO2 into formate and acetate in polyoxometalate catholyte with indium catalyst
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Bingjie Zha, Chunxiang Li, Jinjin LiAbstractThe electrocatalytic reduction of CO2 with In is severely hindered by its complex multi-electron reaction pathway for C2 products and the high reaction overpotential. Polyoxometalates (POM) with the ability to transport and store electrons and protons have great potential to overcome these limitations. The Keggin-type POM [SiW9V3O40]7− (SiW9V3) and metal indium were selected to build the electrocatalytic CO2 reduction system. It overcomed the low selectivity limitation of In for C2 products, c...
Source: Journal of Catalysis - December 29, 2019 Category: Chemistry Source Type: research

Direct CO2 hydrogenation to ethanol over supported Co2C catalysts: Studies on support effects and mechanism
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Shunan Zhang, Xiaofang Liu, Zilong Shao, Hui Wang, Yuhan SunAbstractDirect CO2 hydrogenation to ethanol is one of the promising and emerging routes for the transformation of CO2 into value-added chemicals, but it remains a major challenge because of low ethanol selectivity and catalytic stability. In this work, Na-promoted cobalt catalysts supported on different materials (Al2O3, ZnO, AC, TiO2, SiO2, and Si3N4) were evaluated to elucidate the effects of supports. The SiO2- and Si3N4-supported catalysts exhibited efficient generation of ethano...
Source: Journal of Catalysis - December 29, 2019 Category: Chemistry Source Type: research

Silicon enrichment on iron contaminated fluid catalytic cracking catalyst particle surface
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Hui JiangAbstractIron poisoning is a well-known problem for fluid catalytic cracking catalysts. Previously, we have used several characterization techniques, including SEM, TEM and EDX, to examine an iron-poisoned catalyst sample from a commercial unit. The results clearly showed that Fe, as well as some other contaminant metals (such as Ni, Mg and Ca), and Si were enriched on the catalyst particle surface (J. Catal. 2018, 361, 126–134). In this contribution, surface Si enrichment was further studied with many iron-poisoned Ecat samples...
Source: Journal of Catalysis - December 27, 2019 Category: Chemistry Source Type: research

Cubic Co-Co prussian blue MOF-based transition metal phosphide as an efficient catalyst for visible light-driven water oxidation
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Yinjuan Dong, Tian Tian, Chunjiang Xu, Kangwei Ma, Wanjun Sun, Yong DingAbstractDesigning and developing an efficient, economic and stable catalyst for photocatalytic water oxidation is a forefront topic of sustainable energy research. Herein, we rationally designed a CoP/NC (CoP nanoparticles embedded in nitrogen and carbon matrices) nanocube catalysts via a pyrolysis phosphidation strategy derived from Co-Co/PB (Co-Co prussian blue) MOF-based precursor, which was employed as a robust heterogeneous catalyst for photocatalytic water oxidation...
Source: Journal of Catalysis - December 24, 2019 Category: Chemistry Source Type: research

Efficient liquid-phase hydrogenation of cinnamaldehyde to cinnamyl alcohol with a robust PtFe/HPZSM-5 catalyst
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Guimei Wang, Huiyue Xin, Qixiang Wang, Peng Wu, Xiaohong LiAbstractHPZSM-5 with hierarchical porous structure obtained via partial desilication of commercial ZSM-5 was proved to be a suitable support for Pt nanoparticles towards the liquid-phase selective hydrogenation of cinnamaldehyde (CAL) to yield cinnamyl alcohol (COL). Compared with Pt/ZSM-5, Pt/HPZSM-5 showed improved catalytic performance although the improvement seems to be very limited. After doping Fe to Pt/HPZSM-5 with a Fe/Pt molar ratio of 0.25, the PtFe/HPZSM-5 catalyst gave mu...
Source: Journal of Catalysis - December 24, 2019 Category: Chemistry Source Type: research

Fabrication of Ni3N nanorods anchored on N-doped carbon for selective semi-hydrogenation of alkynes
Publication date: February 2020Source: Journal of Catalysis, Volume 382Author(s): Xiaozhen Shi, Xin Wen, Shilin Nie, Jie Dong, Jingde Li, Yongqing Shi, Huiling Zhang, Guoyi BaiAbstractNickel is a highly active catalyst for the semi-hydrogenation of alkynes. However, the low selectivity of the alkene product caused by the over-hydrogenation reaction on Ni has hindered its practical applications. In this work, we report a new nickel nitride (Ni3N)-catalyzed semi-hydrogenation of alkynes to the corresponding alkenes. The Ni3N nanorods were facilely fabricated via a direct pyrolysis of the solid mixture of nickel acetate tetra...
Source: Journal of Catalysis - December 24, 2019 Category: Chemistry Source Type: research

Utilization of hydrophobic ligands for water-insoluble Fe(II) water oxidation catalysts – Immobilization and characterization
Publication date: January 2020Source: Journal of Catalysis, Volume 381Author(s): Sahir M. Al-Zuraiji, Tímea Benkó, Levente Illés, Miklós Németh, Krisztina Frey, Attila Sulyok, József S. PapAbstractHerein, we compare the electrochemical and electrocatalytic properties of two selected, water-insoluble Fe(II) coordination complexes made with the non-symmetric, bidentate ligands, 2-(2′-pyridyl)benzimidazole (PBI) in [Fe(PBI)3](OTf)2 (1, OTf− = trifluoromethyl sulfonate anion) and 2-(2′-pyridyl)benzoxazole (PBO) in [Fe(PBO)2(OTf)2] (2) . Cyclic voltammetry in water/ace...
Source: Journal of Catalysis - December 21, 2019 Category: Chemistry Source Type: research

Grain refinement of self-supported copper electrode by multiple-redox treatment for enhanced carbon dioxide electroreduction towards carbon monoxide generation
Publication date: January 2020Source: Journal of Catalysis, Volume 381Author(s): Peng Huang, Jinxi Chen, Peilin Deng, Fan Yang, Jing Pan, Kai Qi, Hongfang Liu, Bao Yu XiaAbstractInspired by grain refinement in the traditional metal processing, we develop a top-down approach by facile multiple-redox treatment to obtain the downsized Cu crystals over the self-supported copper electrodes for the enhanced selective CO2 electroreduction. Specifically, the treated copper meshes exhibit an increased activity and selectivity for CO production with high Faradaic efficiency of 78% and partial current density of 13.2 mA cm&...
Source: Journal of Catalysis - December 21, 2019 Category: Chemistry Source Type: research

Heterostructured MoS2@Bi2Se3 nanoflowers: A highly efficient electrocatalyst for hydrogen evolution
Publication date: January 2020Source: Journal of Catalysis, Volume 381Author(s): Dong Li, Jie Lao, Chunli Jiang, Yang Shen, Chunhua Luo, Ruijuan Qi, Hechun Lin, Rong Huang, Geoffrey I.N. Waterhouse, Hui PengAbstractThe transition metal dichalcogenide MoS2 shows good catalytic properties for the hydrogen evolution reaction (HER). However, the HER activity of 2D MoS2 is limited by its poor electrical conductivity. Bi2Se3 nanosheets are topological insulators possessing metallic surface states, thereby displaying unconventional electron dynamics and excellent conductivity. Therefore, combining Bi2Se3 nanosheets and with MoS2 ...
Source: Journal of Catalysis - December 21, 2019 Category: Chemistry Source Type: research

B2O3@BPO4 sandwich-like hollow spheres as metal-free supported liquid-phase catalysts
We report sandwich-like B2O3@BPO4 hollow spheres synthesized through a one-step template-free method. At reaction temperatures (>450 °C), melted B2O3 supported on the surface of BPO4 hollow spheres acts as a catalytically active species for the selective oxidative dehydrogenation of propane to propene, with an excellent productivity of 0.79 gC3H6 gcat−1 h−1 and a high stability at 550 °C. We also found a phenomenon of tertiary aggregation during the formation of this sandwich-like hollow sphere. Additionally, the kinetic experiments indicate oxygen activation on the B2O3@BPO4 surface and se...
Source: Journal of Catalysis - December 21, 2019 Category: Chemistry Source Type: research

Visible-light-mediated high-efficiency catalytic oxidation of sulfides using wrinkled C3N4 nanosheets
Publication date: January 2020Source: Journal of Catalysis, Volume 381Author(s): Jingjun Li, Yanning Chen, Xue Yang, Shuiying Gao, Rong CaoAbstractIncorporating visible light into sulfide oxidation is an emerging desirable strategy to produce versatile sulfoxides. We introduce the design and synthesis of multilayered wrinkled C3N4 nanosheets and demonstrate their unprecedented sulfide oxidation activity. Due to the wrinkled surfaces with a large SBET (208.6 m2g−1), wrinkled C3N4 nanosheets exhibit a sensitive optical response, facilitating the electron photoexcition. Layer structure confinement enables robust e&minus...
Source: Journal of Catalysis - December 20, 2019 Category: Chemistry Source Type: research

Changes in Ni-NiO equilibrium due to LaFeO3 and the effect on dry reforming of CH4
Publication date: January 2020Source: Journal of Catalysis, Volume 381Author(s): Xinyu Mao, Alexandre C. Foucher, Eric A. Stach, Raymond J. GorteAbstractThe interactions between Ni and LaFeO3 were studied on catalysts prepared by Atomic Layer Deposition (ALD) of 0.5-nm films of LaFeO3 on MgAl2O4. Scanning Transmission Electron Microscopy showed that the films covered the support uniformly, even after 5 redox cycles at 1073 K, and X-Ray Diffraction showed that the films had the perovskite structure. Equilibrium between Ni and NiO was studied using coulometric-titration and flow-titration measurements on 5-wt% Ni cataly...
Source: Journal of Catalysis - December 20, 2019 Category: Chemistry Source Type: research

Insights into the active sites and catalytic mechanism of oxidative esterification of 5-hydroxymethylfurfural by metal-organic frameworks-derived N-doped carbon
Publication date: January 2020Source: Journal of Catalysis, Volume 381Author(s): Yunchao Feng, Wenlong Jia, Guihua Yan, Xianhai Zeng, Jonathan Sperry, Binbin Xu, Yong Sun, Xing Tang, Tingzhou Lei, Lu LinAbstractDirectly oxidative esterification of Biomass-derived 5-hydroxymethylfurfural (HMF) into dimethyl furan dicarboxylate (DMFDCA) is a promising route for the replacement of petroleum-derived commodity chemical terephthalic acid (TPA) extensively employed in polyester synthesis. Co-based N-doped carbon materials are one of the most promising applied catalysts for oxidative esterification reaction, however, the active si...
Source: Journal of Catalysis - December 20, 2019 Category: Chemistry Source Type: research

Unraveling the mechanism of the hydrodeoxygenation of propionic acid over a Pt (1 1 1) surface in vapor and liquid phases
Publication date: January 2020Source: Journal of Catalysis, Volume 381Author(s): Wenqiang Yang, Rajadurai Vijay Solomon, Jianmin Lu, Osman Mamun, Jesse Q. Bond, Andreas HeydenAbstractMicrokinetic models based on first principles calculations have been developed for the vapor and liquid phase hydrodeoxygenation of propionic acid over a Pt (1 1 1) surface. Calculations suggest that decarboxylation does not occur at an appreciable rate. In the vapor phase, decarbonylation products, propanal and propanol are all produced at similar rates. However, in both liquid water and 1,4-dioxane, propanol and propanal are favore...
Source: Journal of Catalysis - December 18, 2019 Category: Chemistry Source Type: research

Aminated poly(ethylene glycol) methacrylate resins as stable heterogeneous catalysts for the aldol reaction in water
Publication date: January 2020Source: Journal of Catalysis, Volume 381Author(s): Anton De Vylder, Jeroen Lauwaert, Jeriffa De Clercq, Pascal Van Der Voort, Christopher W. Jones, Joris W. ThybautAbstractAmine functionalized silicas have frequently been investigated as potential aldol reaction catalysts. However, active site leaching due to hydrolysis cannot be avoided, limiting the long-term stability of these catalysts in aqueous aldol reactions. Therefore, novel catalysts based on an organic resin have been developed starting from a suspension polymerized poly(ethylene glycol) methacrylate (PEGMA) hydrogel with poly(ethyl...
Source: Journal of Catalysis - December 14, 2019 Category: Chemistry Source Type: research

γ-Al2O3 sheet-stabilized isolate Co2+ for catalytic propane dehydrogenation
Publication date: January 2020Source: Journal of Catalysis, Volume 381Author(s): Yihu Dai, Jingjing Gu, Suyang Tian, Yue Wu, Junchao Chen, Fanxing Li, Yonghua Du, Luming Peng, Weiping Ding, Yanhui YangAbstractCo-based catalysts are promising alternatives to replace Pt- and Cr-based catalysts for propane dehydrogenation (PDH) in view of the catalytic activity for C–H bond activation, low cost, and low toxicity. However, the reduction of unstable CoOx species and coke deposition cause serious catalyst deactivation. In this work, a sheet-shaped Co–Al2O3 catalyst comprising of isolate Co2+ sites shows a high intrin...
Source: Journal of Catalysis - December 14, 2019 Category: Chemistry Source Type: research

Accelerating water dissociation kinetics on Ni3S2 nanosheets by P-induced electronic modulation
Publication date: January 2020Source: Journal of Catalysis, Volume 381Author(s): Hongye Qin, Biao Zhang, Yaping Pan, Xixi Wang, Lechen Diao, Jiao Chen, Jinli Wu, Enzuo Liu, Junwei Sha, Liying Ma, Naiqin ZhaoAbstractDeveloping efficient and low-cost electrocatalysts for hydrogen evolution reaction (HER) is important in clean energy systems. Non-noble transition metals are the most promising candidates for the replacement of conventional Pt group catalysts of HER. However, most non-noble metals show poor HER activity due to the intrinsic electronic structures. Herein, P atoms doped Ni3S2 (P-doped Ni3S2) nanosheets array grow...
Source: Journal of Catalysis - December 14, 2019 Category: Chemistry Source Type: research

ITO regulated high-performance n-Si/ITO/α-Fe2O3 Z-scheme heterostructure towards photoelectrochemical water splitting
Publication date: January 2020Source: Journal of Catalysis, Volume 381Author(s): Deqiang Feng, Jiangtao Qu, Rui Zhang, Xingjun Sun, Lingcheng Zheng, Hui Liu, Xinghua Zhang, Zunming Lu, Feng Lu, Weihua Wang, Hong Dong, Yahui Cheng, Hui Liu, Rongkun ZhengAbstractThe deficiencies in the separating photogenerated electrons/holes in the bulk and driving them across the interface of semiconductor/electrolyte are the major issues that limit the photoelectrochemical (PEC) performance of hematite (α-Fe2O3) photoelectrodes. In this work, a Z-scheme planar heterostructure of n-Si and α-Fe2O3 was designed and constructed b...
Source: Journal of Catalysis - December 14, 2019 Category: Chemistry Source Type: research

Oxidation state of Mo affects dissolution and visible-light photocatalytic activity of MoO3 nanostructures
This study demonstrates that MoO3 nanostructure chemical and physical properties, as well as nanostructure dissolution process, influence the photocatalytic properties of MoO3 nanostructures.Graphical abstract (Source: Journal of Catalysis)
Source: Journal of Catalysis - December 14, 2019 Category: Chemistry Source Type: research

Revising the role of chromium on the surface of perovskite electrodes: Poison or promoter for the solid oxide electrolysis cell performance?
Publication date: January 2020Source: Journal of Catalysis, Volume 381Author(s): Dingkai Chen, Basma Mewafy, Fotios Paloukis, Liping Zhong, Vasiliki Papaefthimiou, Thierry Dintzer, Kalliopi M. Papazisi, Stella P. Balomenou, Dimitrios Tsiplakides, Detre Teschner, Virginia Pérez-Dieste, Carlos Escudero, Spyridon ZafeiratosAbstractPerovskite materials are typically used as oxygen electrodes of solid oxide fuel and electrolysis cells (SOC). The high stability of the perovskite structure in oxidative environments makes it a good candidate as a cathode electrode for steam electrolysis SOC as well. In this work, we investi...
Source: Journal of Catalysis - December 14, 2019 Category: Chemistry Source Type: research

Coupling effect of piezomaterial and DSA catalyst for degradation of metronidazole: Finding of induction electrocatalysis from remnant piezoelectric filed
Publication date: January 2020Source: Journal of Catalysis, Volume 381Author(s): Jinxi Feng, Jingxiang Sun, Xiaosheng Liu, Jinzhu Zhu, Shuanghong Tian, Rong Wu, Ya XiongAbstractPiezocatalysis is an emerging green advanced-oxidation technology for the degradation of toxic pollutants; however, piezomaterials are not generally excellent electrocatalysts. Herein, two complex piezocatalysts (SnO2/t-BaTiO3 and SnO2-Sb/t-BaTiO3) consisting of an electrocatalyst and piezomaterial, respectively, are designed to investigate the coupled effect of piezocatalytic and electrocatalytic processes on the degradation of pollutants. SnO2, es...
Source: Journal of Catalysis - December 14, 2019 Category: Chemistry Source Type: research

Transfer hydrogenation of cinnamaldehyde to cinnamyl alcohol in hydrophobically modified core–shell MOFs nanoreactor: Identification of the formed metal–N as the structure of an active site
Publication date: January 2020Source: Journal of Catalysis, Volume 381Author(s): Haishuai Cui, Sihua Liu, Yang Lv, Shengtao Wu, Liping Wang, Fang Hao, Pingle Liu, Wei Xiong, Hean LuoAbstractZeolitic imidazolate frameworks (ZIFs) were successfully prepared and applied in the environmentally friendly transfer hydrogenation of cinnamaldehyde to cinnamyl alcohol. This was proved to be a homogeneous reaction in heterogeneous system. The experimental results show that ZIFs have better catalytic performance than nitrate. To overcome the recycling of the catalysts, the hydrophobically modified core–shell structure ZIF-67@SiO...
Source: Journal of Catalysis - December 11, 2019 Category: Chemistry Source Type: research

Efficient hydrogen production via urea electrolysis with cobalt doped nickel hydroxide-riched hybrid films: Cobalt doping effect and mechanism aspect
Publication date: January 2020Source: Journal of Catalysis, Volume 381Author(s): C.B. Sun, M.W. Guo, S.S. Siwal, Q.B. ZhangAbstractThe exploration of earth-abundant catalysts that are highly active and robustly stable for urea electrooxidation is critical for energy-efficient hydrogen production associated with urea-rich wastewater purification. Herein, Co-doped α-Ni(OH)2 hybrid films with unique ultrafine nanoparticles assembled network structure are constructed as efficient bifunctional electrocatalysts for urea-assisted water electrolysis. By employing a facile potentiodynamic deposition route carried out in a dee...
Source: Journal of Catalysis - December 11, 2019 Category: Chemistry Source Type: research

Anomalous potential dependence of conducting property in black titania nanotube arrays for electrocatalytic chlorine evolution
Publication date: January 2020Source: Journal of Catalysis, Volume 381Author(s): Seong Eun Heo, Hyun Woo Lim, Deok Ki Cho, Ik Jae Park, Hyunki Kim, Chan Woo Lee, Sang Hyun Ahn, Jin Young KimAbstractRu- and Ti-based oxide electrocatalysts have been intensively studied for chlorine evolution reactions since their synergistic effect was demonstrated in commercial dimensionally stable anodes. Basically, oxide materials intrinsically possess a semiconducting nature; therefore, tuning conducting properties is important in achieving high electrocatalytic activity. Here, black TiO2 nanotube arrays deposited with RuO2 by pulsed ele...
Source: Journal of Catalysis - December 11, 2019 Category: Chemistry Source Type: research

Host-guest chemistry immobilized nickel nanoparticles on zeolites as efficient catalysts for amination of 1-octanol
Publication date: January 2020Source: Journal of Catalysis, Volume 381Author(s): Bo Wang, Yu Ding, Kun Lu, Yejun Guan, Xiaohong Li, Hao Xu, Peng WuAbstractNickel silicate and NiAl-LDHs (layered double-hydroxides) have been controllably fabricated on the crystal surface of Si-rich and Al-rich USY zeolites, respectively, through a distinctive in-situ hydrothermal growth approach. This was realized by the host-guest chemistry that induced chemoselective interactions between adscititious Ni source and constituent species of zeolite framework. Upon hydrogen reduction, nickel silicate and NiAl-LDHs were transformed to highly dis...
Source: Journal of Catalysis - December 10, 2019 Category: Chemistry Source Type: research