IHEP OpenIR  > 北京同步辐射装置
In situ activation of Br-confined Ni-based metal-organic framework hollow prisms toward efficient electrochemical oxygen evolution
BSRF用户
2021
Source PublicationSCIENCE ADVANCES
ISSN2375-2548
Volume7Issue:46Pages:eabk0919
SubtypeArticle
AbstractFundamental insights into the structural evolution of oxygen electrocatalysts under operating conditions are of substantial importance for designing efficient catalysts. Here, on the basis of operando x-ray absorption fine structure spectroscopy, we probe the in situ activation of Br-confined conductive Ni-based metal-organic framework (Br-Ni-MOF) hollow prisms toward an active oxygen electrocatalyst during the oxygen evolution reaction (OER) process. The successive structural transformations from pristine Br-Ni-MOF to a beta-Ni(OH)(2) analog then subsequently to a gamma-NiOOH phase during OER are observed. This post-formed gamma-NiOOH analog manifests high OER performance with a superior overpotential of 306 mV at 10 mA cm(-2) and a high turnover frequency value of 0.051 s(-1) at an overpotential of 300 mV, making Br-Ni-MOF one of the most active oxygen electrocatalysts reported. Density functional theory calculations reveal that the strong electronic coupling between Br and Ni atoms accelerates the generation of the key *O intermediate toward fast OER kinetics.
DOI10.1126/sciadv.abk0919
Indexed BySCI ; ADS
Language英语
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000717666900019
ADS Bibcode2021SciA....7..919C
ADS URLhttps://ui.adsabs.harvard.edu/abs/2021SciA....7..919C
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2021SciA....7..919C/citations
ItemNoBSRF00916
beamline1W1B
Citation statistics
Cited Times:1 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/293684
Collection北京同步辐射装置
Recommended Citation
GB/T 7714
BSRF用户. In situ activation of Br-confined Ni-based metal-organic framework hollow prisms toward efficient electrochemical oxygen evolution[J]. SCIENCE ADVANCES,2021,7(46):eabk0919.
APA BSRF用户.(2021).In situ activation of Br-confined Ni-based metal-organic framework hollow prisms toward efficient electrochemical oxygen evolution.SCIENCE ADVANCES,7(46),eabk0919.
MLA BSRF用户."In situ activation of Br-confined Ni-based metal-organic framework hollow prisms toward efficient electrochemical oxygen evolution".SCIENCE ADVANCES 7.46(2021):eabk0919.
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