Electrocatalysts development for hydrogen oxidation reaction in alkaline media:From mechanism understanding to materials design

作     者：Yang Qiu Xiaohong Xie Wenzhen Li Yuyan Shao 仇旸;谢小红;李文震;邵玉艳

作者机构：Pacific Northwest National LaboratoryRichlandWashington 99352USA Department of Chemical&Biological EngineeringIowa State UniversityAmesIAUSA DOE’s Ames LaboratoryAmesIAUSA 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2021年第42卷第12期

页      面：2094-2104页

核心收录：

学科分类：0808[工学-电气工程] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：DOE-EERE-HFTO Energy Efficiency and Renewable Energy, Hydrogen and Fuel Cell Technologies Office U.S. Department of Energy, USDOE 

主　　题：Hydrogen oxidation reaction Alkaline electrolyte Fuel cell Electrocatalyst Electrocatalysis Hydrogen and hydroxide binding energy 

摘      要：Anion exchange membrane(AEM)fuel cells have gained great attention partially due to the advantage of using non-precious metal as ***,the reaction kinetics of hydrogen oxidation reaction(HOR)is two orders of magnitude slower in alkaline systems than in *** understand the slower kinetics of HOR in base,two major theories have been proposed,such as(1)pH dependent hydrogen binding energy as a major descriptor for HOR;and(2)bifunctional theory based on the contributions of both hydrogen and hydroxide adsorption for HOR in alkaline ***,we discuss the possible HOR mechanisms in alkaline electrolytes with the corresponding change in their Tafel *** from the traditional Tafel-Volmer and Heyrovsky-Volmer HOR mechanisms,the recently proposed hydroxide adsorption step is also discussed to illustrate the difference in HOR mechanisms in acid and *** further summarize the representative works of alkaline HOR catalyst design(e.g.,precious metals,alloy,intermetallic materials,Ni-based alloys,carbides,nitrides,etc.),and briefly describe their fundamental HOR reaction mechanism to emphasize the difference in elementary reaction steps in alkaline *** strategy of strengthening local interaction that facilitates both H2 desorption and Hads+OHads recombination is finally proposed for future HOR catalyst design in alkaline environment.