globalchange  > 气候变化与战略
DOI: 10.1016/j.scib.2020.06.007
论文题名:
Discrepant roles of adsorbed OH* species on IrWOx for boosting alkaline hydrogen electrocatalysis
作者: Fu L.; Yang F.; Hu Y.; Li Y.; Chen S.; Luo W.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2020
卷: 65, 期:20
起始页码: 1735
结束页码: 1742
语种: 英语
中文关键词: 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
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
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169892
Appears in Collections:气候变化与战略

Files in This Item:

There are no files associated with this item.


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

Recommended Citation:
Fu L.,Yang F.,Hu Y.,et al. Discrepant roles of adsorbed OH* species on IrWOx for boosting alkaline hydrogen electrocatalysis[J]. Science Bulletin,2020-01-01,65(20)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Fu L.]'s Articles
[Yang F.]'s Articles
[Hu Y.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Fu L.]'s Articles
[Yang F.]'s Articles
[Hu Y.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Fu L.]‘s Articles
[Yang F.]‘s Articles
[Hu Y.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.