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DC Field | Value | Language |
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dc.contributor.author | Cheng, Weiren | en_US |
dc.contributor.author | Xi, Shibo | en_US |
dc.contributor.author | Wu, Zhi-Peng | en_US |
dc.contributor.author | Luan, Deyan | en_US |
dc.contributor.author | Lou, David Xiong Wen | en_US |
dc.date.accessioned | 2022-05-25T02:24:17Z | - |
dc.date.available | 2022-05-25T02:24:17Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Cheng, W., Xi, S., Wu, Z., Luan, D. & Lou, D. X. W. (2021). In situ activation of Br-confined Ni-based metal-organic framework hollow prisms toward efficient electrochemical oxygen evolution. Science Advances, 7(46), eabk0919-. https://dx.doi.org/10.1126/sciadv.abk0919 | en_US |
dc.identifier.issn | 2375-2548 | en_US |
dc.identifier.uri | https://hdl.handle.net/10356/154363 | - |
dc.description.abstract | Fundamental 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 β-Ni(OH)2 analog then subsequently to a γ-NiOOH phase during OER are observed. This post-formed γ-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. | en_US |
dc.description.sponsorship | Ministry of Education (MOE) | en_US |
dc.language.iso | en | en_US |
dc.relation | MOE2017-T2-2-003 | en_US |
dc.relation.ispartof | Science Advances | en_US |
dc.rights | © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S.Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). | en_US |
dc.subject | Engineering::Chemical engineering | en_US |
dc.title | In situ activation of Br-confined Ni-based metal-organic framework hollow prisms toward efficient electrochemical oxygen evolution | en_US |
dc.type | Journal Article | en |
dc.contributor.school | School of Chemical and Biomedical Engineering | en_US |
dc.identifier.doi | 10.1126/sciadv.abk0919 | - |
dc.description.version | Published version | en_US |
dc.identifier.pmid | 34757786 | - |
dc.identifier.scopus | 2-s2.0-85118938137 | - |
dc.identifier.issue | 46 | en_US |
dc.identifier.volume | 7 | en_US |
dc.identifier.spage | eabk0919 | en_US |
dc.subject.keywords | Energy-Storage | en_US |
dc.subject.keywords | Electrocatalysts | en_US |
dc.description.acknowledgement | X.W.L. acknowledges funding support from the Ministry of Education of Singapore through the Academic Research Fund (AcRF) Tier-2 funding (MOE2017-T2-2-003). | en_US |
item.fulltext | With Fulltext | - |
item.grantfulltext | open | - |
Appears in Collections: | SCBE Journal Articles |
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File | Description | Size | Format | |
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sciadv.abk0919.pdf | 4.68 MB | Adobe PDF | View/Open |
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