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DOI	10.1016/j.scib.2020.06.007
	*Discrepant roles of adsorbed OH species on IrWOx for boosting alkaline hydrogen electrocatalysis**
	Fu L.; Yang F.; Hu Y.; Li Y.; Chen S.; Luo W.
发表日期	2020
ISSN	20959273
起始页码	1735
结束页码	1742
卷号	65 期号:20
英文摘要	Improving the slow kinetics of alkaline hydrogen electrode reactions, involving hydrogen oxidation and evolution reactions (HOR/HER) is highly desirable for accelerating the commercialization of alkaline exchange membrane-based fuel cells (AEMFCs) and water electrolyzers (AEMWEs). However, fundamental understanding of the mechanism for HOR/HER catalysis under alkaline media is still debatable. Here we develop an amorphous tungsten oxide clusters modified iridium-tungsten nanocrystallines (IrWOx) which exhibited by far the highest exchange current density and mass activity, about three times higher than the commercial Pt/C toward alkaline HOR/HER. Density functional theory (DFT) calculations reveal the WOx clusters act as a pivotal role to boost reversible hydrogen electrode reactions in alkaline condition but via different mechanisms, which are, hydrogen binding energy (HBE) mechanism for HOR and bi-functional mechanism for HER. This work is expected to promote our fundamental understanding about the alkaline HOR/HER catalysis and provide a new avenue for rational design of highly efficient electrocatalysts toward HOR/HER under alkaline electrolytes. © 2020 Science China Press
关键词	Bi-functional mechanism HBE Hydrogen evolution reaction Hydrogen oxidation reacion IrWOx
英文关键词	Binding energy; Catalysis; Density functional theory; Design for testability; Electrocatalysis; Electrocatalysts; Electrodes; Iridium compounds; Tungsten compounds; Alkaline conditions; Alkaline electrolytes; Bi-functional mechanisms; Different mechanisms; Evolution reactions; Exchange current densities; Hydrogen electrode reactions; Reversible hydrogen electrodes; Alkaline fuel cells
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207036
作者单位	Hubei Electrochemical Power Sources Key Laboratory, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China; Suzhou Institute of Wuhan University, Suzhou, 215123, China
推荐引用方式 GB/T 7714	Fu L.,Yang F.,Hu Y.,et al. Discrepant roles of adsorbed OH* species on IrWOx for boosting alkaline hydrogen electrocatalysis[J],2020,65(20).
APA	Fu L.,Yang F.,Hu Y.,Li Y.,Chen S.,&Luo W..(2020).Discrepant roles of adsorbed OH* species on IrWOx for boosting alkaline hydrogen electrocatalysis.Science Bulletin,65(20).
MLA	Fu L.,et al."Discrepant roles of adsorbed OH* species on IrWOx for boosting alkaline hydrogen electrocatalysis".Science Bulletin 65.20(2020).