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An insight into the enhanced mechanism of Ru–MoO_(2)interfacial chemical bonding for hydrogen evolution reaction in alkaline media

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Nano Research 2023年第2期16卷 2230-2235页

作者： Ying Yuan Wei Han Chenchen Zhang Qi Sun Yingxin Hao Jiamin Zhao Jinsheng Zhao Xiujuan Zhong Ningqiang Zhang School of Chemistry and Chemical Engineering Liaocheng UniversityLiaocheng 252059China National Energy R&D Center for Petroleum Refining Technology Research Institute of Petroleum ProcessingChina Petroleum&Chemical Corporation(SINOPEC)Beijing 100083China Institute for Catalysis Hokkaido UniversityN-21W-10SapporoHokkaido 001-0021Japan

An effective strategy was proposed to control the formation of the interfacial bonding between Ru and molybdenum oxide support to stabilize the Ru atoms with the aim to enhance the hydrogen evolution reaction(HER)activity of the resultant catalysts in alkaline *** different interfacial chemical bonds,including Ru–O,Ru–O–Mo,and mixed Ru–Mo/Ru–O–Mo,were prepared using an induced activation strategy by controlling the composition of reducing agents in the calcination *** the regulation mechanism of the interfacial chemical bonds in molybdenum oxide supported Ru catalysts for optimizing HER activity was investigated by density functional theory(DFT)and experimental *** found that a controlled interfacial chemical Ru–O–Mo bonding in Ru-MoO_(2)/C manifests a 12-fold activity increase in catalyzing the hydrogen evolution reaction relative to the conventional metal/metal oxide catalyst(Ru-O-MoO_(2)/C).In a bifunctional effect,the interfacial chemical Ru-O-Mo sites promoted the dissociation of water and the production of hydrogen intermediates that were then adsorbed on the nearby Ru surfaces and recombined into molecular *** compared,the nearby Ru surfaces in Ru–Mo bonding have weak adsorption capacity for the generation of these hydrogen intermediates,resulting in a 5-fold increase HER activity for Ru-Mo-MoO_(2)/C catalyst compared with Ru-O-MoO_(2)/C.

关键词： interfacial chemical bonds alkaline media hydrogen evolution reaction Ru–O–Mo

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Polymer Film Supported Bimetallic Au–Ag Catalysts for Electrocatalytic Oxidation of Ammonia Borane in alkaline media

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Nano-Micro Letters 2016年第4期8卷 358-370页

作者： Sukriye Ulubay Karabiberoglu Cagri Ceylan Kocak Suleyman Kocak Zekerya Dursun Department of Chemistry Science FacultyEge University Occupational Health and Safety Department Bergama Vocational SchoolDokuz Eylul University Department of Chemistry Science and Art FacultyCelal Bayar University

Ammonia borane is widely used in most areas including fuel cell *** present paper describes electrochemical behavior of ammonia borane in alkaline media on the poly(p-aminophenol) film modified with Au and Ag bimetallic *** glassy carbon electrode was firstly covered with polymeric film electrochemically and then,Au,Ag,and Au–Ag nanoparticles were deposited on the polymeric film,*** surface morphology and chemical composition of these electrodes were examined by scanning electron microscopy,transmission electron microscopy,electrochemical impedance spectroscopy,X-ray diffraction,and X-ray photoelectron *** was found that alloyed Au–Ag bimetallic nanoparticles are *** measurements indicate that the developed electrode modified by Au–Ag bimetallic nanoparticles exhibit the highest electrocatalytic activity for ammonia borane oxidation in alkaline *** rotating disk electrode voltammetry demonstrates that the developed electrode can catalyze almost six-electron oxidation pathway of ammonia *** results may be attractive for anode materials of ammonia borane fuel cells under alkaline conditions.

关键词： Au-Ag bimetallic nanoparticles Ammonia borane Electrocatalyst Electropolymerization alkaline media

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CoFe-LDH nanowire arrays on graphite felt: A high-performance oxygen evolution electrocatalyst in alkaline media

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Chinese Chemical Letters 2022年第2期33卷 890-892页

作者： Biao Deng Jie Liang Luchao Yue Tingshuai Li Qian Liu Yang Liu Shuyan Gao Abdulmohsen Ali Alshehri Khalid Ahmed Alzahrani Yonglan Luo Xuping Sun Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province School of Chemistry and Chemical EngineeringChina West Normal UniversityNanchong 637002China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China Institute for Advanced Study Chengdu UniversityChengdu 610106China School of Materials Science and Engineering Henan Normal UniversityXinxiang 453007China Chemistry Department Faculty of ScienceKing Abdulaziz UniversityP.O.Box 80203Jeddah 21589Saudi Arabia

Developing non-noble-metal oxygen evolution reaction(OER) electrocatalysts with high performance is critical to electrocatalytic water splitting. In this work, we fabricated Co Fe-layered double hydroxide(LDH) nanowire arrays on graphite felt(Co Fe-LDH/GF) via a hydrothermal method. The Co Fe-LDH/GF, as a robust integrated 3 D OER anode, exhibits excellent catalytic activity with the need of low overpotential of 252 and 285 mV to drive current densities of 10 and 100 mA/cm^(2) in 1.0 mol/L KOH, respectively. In addition, it also maintains electrochemical durability for at least 24 h. This work would open up avenues for the development of GF like attractive catalyst supports for oxygen evolution applications.

关键词： LDH Graphite felt Electrocatalyst Oxygen evolution alkaline media

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Surface-clean low-doped PdB/C as superior electrocatalysts toward ethanol oxidation in alkaline media

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Journal of Energy Chemistry 2018年第2期27卷 389-394页

作者： Yuan-Fang Wang Chan Zhu Yao-Yue Yang Zhi-Gang Zhao College of Chemistry and Environmental Protection Engineering Southwest Minzu University

Developing highly active, low-cost and organic surfactants-free Pd-based catalysts for ethanol oxidation reaction（EOR） is now critically important for direct ethanol fuel cells. Herein, surface-clean low-doped PdB/C catalysts（typically ca. 1.5 at% of B） are successfully prepared in an aqueous condition without adding any organic surfactants. TEM characterization shows that as-prepared low-doped Pd B nanoparticles are evenly distributed on carbon support. Cyclic voltommagrams of as-prepared low-doped PdB/C in 0.5 M NaOH ＋ 1 M C2H5OH indicate that its onset oxidation potential of ethanol is ca. 80-120 mV more negative than that on commercial Pd/C. Meanwhile, the EOR mass activity of our home-made catalysts is up to 4018 m A·mg-1 Pd. Moreover, the durability on low-doped PdB/C catalysts is at most 2 times higher than that on commercial Pd/C. Geometric and electronic effects are adopted to understand the above mentioned enhancement of activity and durability. This work may provide a facile, low-cost and green strategy on preparing electrocatalysts toward EOR in alkaline media.

关键词： EOR Surface-clean low-doped PdB/C alkaline media Geometric and electronic effects

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Conversion of bimetallic MOF to Ru-doped Cu electrocatalysts for efficient hydrogen evolution in alkaline media

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Science Bulletin 2021年第3期66卷 257-264,M0004页

作者： Mengya Yang Long Jiao Huilong Dong Liujiang Zhou Changqing Teng Dongming Yan Tian-Nan Ye Xiaoxin Chen Yi Liu Hai-Long Jiang Institute for Composites Science Innovation(InCSI) School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Hefei National Laboratory for Physical Sciences at the Microscale Department of ChemistryUniversity of Science and Technology of ChinaHefei 230026China School of Chemistry and Materials Engineering Changshu Institute of TechnologyChangshu 215500China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China School of Civil and Architectural Engineering Zhejiang UniversityHangzhou 310058China Materials Research Center for Element Strategy Tokyo Institute of TechnologyYokohama 226-8503Japan Center of Electron Microscopy and School of Material Science and Engineering Zhejiang UniversityHangzhou 310027China

The rational design and construction of inexpensive and highly active electrocatalysts for hydrogen evolution reaction(HER)is of great importance for water ***,we develop a facile approach for preparation of porous carbon-confined Ru-doped Cu nanoparticles(denoted as Ru-Cu@C)by direct pyrolysis of the Ru-exchanged Cu-BTC metal–organic *** served as the electrocatalyst for HER,strikingly,the obtained Ru-Cu@C catalyst exhibits an ultralow overpotential(only 20 mV at 10 mA cm^(-2))with a small Tafel slope of 37 m V dec^(-1)in alkaline *** excellent performance is comparable or even superior to that of commercial Pt/C *** functional theory(DFT)calculations confirm that introducing Ru atoms into Cu nanocrystals can significantly alter the desorption of H_(2) to achieve a close-to-zero hydrogen adsorption energy and thereby boost the HER *** strategy gives a fresh impetus to explore low-cost and high-performance catalysts for HER in alkaline media.

关键词： Metal–organic framework Ru-doped Cu nanoparticles Hydrogen evolution reaction alkaline media Hydrogen adsorption energy

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A perspective on the promoting effect of Ir and Au on Pd toward the ethanol oxidation reaction in alkaline media

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Frontiers in Energy 2018年第4期12卷 501-508页

作者： S.Y.SHEN Y.G.GUO G.H.WEI L.X.LUO F.LI J.L.ZHANG Institute of Fuel Cells School of Mechanical EngineeringMOE Key Laboratory of Power & Machinery EngineeringShanghai Jiao Tong UniversityShanghai 200240China SJTU-Paris Tech Elite Institute of Technology Shanghai Jiao Tong UniversityShanghai 200240China

There remain great challenges in developing highly efficient electrocatalysts with both high activity and good stability for the ethanol oxidation reaction in alkaline media. Herein, two architectures of tri-metallic PdIrAu/C electrocatalysts are designed and the promoting effect of Au and Ir on Pd toward the ethanol oxidation reaction (EOR) in alkaline media is investigated in detail. On the one hand, the tri-metallic Pd7Au7Ir/C electrocatalyst with a solid solution alloy architecture is less active relative to Pd7Ir/C and Pd/C while the stabilizing effect of Au leads to both a higher activity and a lower degradation percentage after 3000 cycles of the accelerated degradation test (ADT) on Pd7Au7Ir/C than those on Pd7Ir/C. On the other hand, the tri-metallic Pd7Ir@(1/3Au)/C electrocatalyst with a near surface alloy architecture delivers a much higher activity with an improvement up to 50.4% compared to Pd7Ir/C. It is speculated that for the tri-metallic Pd7Ir@(1/3Au)/C electrocatalyst, certain Au atoms are well designed on surfaces to introduce an electronic modification, thus leading to an anti-poisoning effect and improving the EOR activity.

关键词： fuel cells catalysts ethanol oxidation alkaline media solid solution alloy near surface alloy

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Synergetic effect of stannate with o-aminophenol on inhibiting H2 evolution of A1 anode in strong alkaline media

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Journal of Shanghai University(English Edition) 2007年第4期11卷 426-431页

作者：张燕宋玉苏王源升 Department Of Chemistry and Materials College of Sciences Naval University of Engineering Wuhan 430033 P. R. China Administrative Office of Training Naval University of Engineering Wuhan 430033 P. R. China

The performance of Al-alloy anode in 4 mol/L KOH with and without stannate and o-aminophenol at 25℃ and 55℃ was studied by hydrogen collection, potentiodynamic polarization and electrochemical impedance spectrum, o-aminophenol acts as a perfect inhibitor because of its adsorbability and forming chelate complex at its optimum concentration of 0.4 mol/L. Stannate enhances the inhibition of o-aminophenol and improves the activity of Al-alloy because of its reduction to tin. There is synergetic effect of stannate with o-aminophenol on the behavior of Al-alloy, and the inhibitive efficiency at 55℃ is better than that at 25 ℃.

关键词： o-amniophenol stannate Al-alloy hydrogen evolution alkaline media

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Optimistic performance of carbon-free hydrazine fuel cells based on controlled electrode structure and water management

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Journal of Energy Chemistry 2020年第12期29卷 175-181页

作者： Hongsun Hwang Sujik Hong Do-Hyeong Kim Moon-Sung Kang Jin-Soo Park Sunghyun Uhm Jaeyoung Lee Electrochemical Reaction and Technology Laboratory(ERTL) School of Earth Sciences and Environmental EngineeringGwangju Institute of Science and Technology(GIST)Cwangju 61005Republic of Korea Ertl Center for Electrochemistry and Catalysis Gwangju Institute of Science and Technology(GIST)Gwangju 61005Republic of Korea Department of Green Chemical Engineering Sangmyung UniversityCheonanChungnam 31066Republic of Korea Plant Engineering Center Institute for Advanced EngineeringYongin 17180Republic of Korea

In this study, we first attempted to discover the optimal configuration of membrane-electrode assemblies(MEAs) used to achieve a high performance of direct hydrazine fuel cells(DHFCs). We have investigated the effect of water management and the electrode thickness on the performance of DHFCs, depending on the hydrophobicity of the gas diffusion layers in the cathode and the catalyst loading in the anode with the carbon-supported Ni, synthesized by a polyol process. With the optimal water management and electrode thickness, the MEA constructed using the as-prepared Ni/C anode catalyst containing the metallic and low oxidative state and ultra-low Pt loading cathode reduced the ohmic resistance and mass transfer limitation in the current-voltage curves observed for the alkaline DHFC, achieving an impressive power performance over 500 mW cm^(–2).

关键词： Fuel cell Hydrazine alkaline media Membrane-electrode assembly

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NiCoP nanoleaves array for electrocatalytic alkaline H2 evolution and overall water splitting

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Journal of Energy Chemistry 2020年第11期29卷 395-401页

作者： Lei Chen Yaohao Song Yi Liu Liang Xu Jiaqian Qin Yongpeng Lei Yougen Tang State Key Laboratory of Powder Metallurgy Hunan Provincial Key Laboratory of Chemical Power SourcesCollege of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083HunanChina Energy Materials Computing Center Jiangxi University of Science and TechnologyNanchang 330013JiangxiChina Research Unit of Advanced Materials for Energy Storage Metallurgy and Materials Science Research InstituteChulalongkorn UniversityBangkok 10330Thailand

The development of non-precious, high-efficient and durable electrocatalysts for H2 evolution in alkaline media is highly desirable. Herein we report NiCoP nanoleaves array vertically grown on Ni foam for H2 evolution and overall water splitting via simple hydrothermal treatment and phosphorization. The selfsupported NiCoP nanoleaves architecture contributes to more exposed active sites, the smaller contact resistance between catalyst and substrate, faster ion diffusion and electron transfer. As a result, the optimized electrode requires only overpotentials of 98 and 173 mV to achieve current densities of 10 and100 m A cm-2 in 1.0 M KOH,respectively. Besides, used as both anode and cathode simultaneously, the electrode delivers current densities of 100 and 200 m A cm-2 at cell voltages of only 1.8 and 1.87 V, respectively. Moreover, the relatively high efficiency of about 11.4% for solar-driven water splitting further illustrates the application of our catalyst to sustainable development based on green technologies.

关键词： Electrocatalysis Hydrogen evolution reaction alkaline media Water splitting Solar-driven electrolysis

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Phosphating-induced charge transfer on CoO/CoP interface for alkaline H_(2)evolution

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Chinese Chemical Letters 2021年第11期32卷 3355-3358页

作者： Qian Li Yuchao Wang Jian Zeng Qiumei Wu Qichen Wang Lian Sun Liang Xu Tong Ye Xin Zhao Lei Chen Zhiyan Chen Limiao Chen Yongpeng Lei State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China School of Material Science and Engineering Central South University of Forestry and TechnologyChangsha 410004China Energy Materials Computing Center Jiangxi University of Science and TechnologyNanchang 330013China Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China School of Material and Chemical Engineering Xi'an Technological UniversityXi'an 710021China

Designing non-noble metal electrocatalysts toward alkaline hydrogen evolution reaction(HER)with high performance at a large current density is ***,a CoO/CoP heterostructure catalyst(termed POZ)was designed by a phosphating *** strong electron transfer on the interface of CoO/CoP was experimentally and theoretically *** showed a low overpotential of 236 mV at 400 mA/cm^(2),which was 249 mV lower than non-phosphated *** also exhibited a remarkable solar-to-hydrogen conversion efficiency of 10.5%.In this work,the construction of CoO/CoP interface realized by a simple phosphating strategy could provide an important reference to boost the HER performance on those materials not merely metal oxides.

关键词： CoO/CoP heterostructure Phosphating H_(2)evolution reaction alkaline media Solar-driven water splitting

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