Title | Mechanistic Regulation by Oxygen Vacancies in Structural Evolution Promoting Electrocatalytic Water Oxidation |
Author | |
Corresponding Author | Fan, Ke |
Publication Years | 2023-03-01
|
DOI | |
Source Title | |
ISSN | 2155-5435
|
Abstract | Introduction of oxygen vacancies (Vo) has been considered an effective strategy for promoting the oxygen evolution reaction (OER) performance of electrocatalysts. However, the role of Vo in improving OER activity is unclear. Herein, a Vo-rich spinel Co3O4 was used as a model catalyst to explore the mechanism of Vo in structural evolution during OER. The results suggest that the Vo-rich environment facilitates the reconstruction of Co3O4 to the Co(OH)2 intermediate with proton vacancies (Co(II)Ox(OH)y), which is favorable for the formation of the active species of CoOOH. Correlative operando characterizations and electrokinetic analyses indicate that a moderate Vo density can switch the O-O bond formation pathway, from a water nucleophilic attack to an intramolecular nucleophilic attack pathway, which is more kinetically favorable for water oxidation. However, a high Vo density quenches the formation of highly valent active intermediates. This study provides significant insights into the crucial role of vacancy defects during OER. |
Keywords | |
URL | [Source Record] |
Indexed By | |
Language | English
|
SUSTech Authorship | Others
|
Funding Project | National Key R&D Program of China["2022YFA0911900","2022YFA0911904"]
; National Natural Science Foundation of China["22088102","22172011","21872174","22002189","U1932148"]
; Fundamental Research Funds for the Central Universities["DUT22LK01","DUT22QN213"]
; Natural Science Foundation of Liaoning Province[2021-MS-126]
; International Science and Technology Cooperation Program["2017YFE0127800","2018YFE0203402"]
; Hunan Provincial Key Research and Development Program[2020WK2002]
; Hunan Provincial Natural Science Foundation of China["2020JJ2041","2020JJ5691"]
; Shenzhen Science and Technology Innovation Project[JCYJ20180307151313532]
; Zhejiang Province Selected Funding for Postdoctoral Research Projects[ZJ2021001]
|
WOS Research Area | Chemistry
|
WOS Subject | Chemistry, Physical
|
WOS Accession No | WOS:000954979600001
|
Publisher | |
Data Source | Web of Science
|
Citation statistics |
Cited Times [WOS]:1
|
Document Type | Journal Article |
Identifier | http://kc.sustech.edu.cn/handle/2SGJ60CL/524048 |
Department | Department of Chemistry 深圳格拉布斯研究院 |
Affiliation | 1.Dalian Univ Technol, Inst Artificial Photosynth, Inst Energy Sci & Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China 2.Westlake Univ, Ctr Artificial Photosynth Solar Fuels, Sch Sci, Hangzhou 310024, Peoples R China 3.Southern Univ Sci & Technol, Shenzhen Grubbs Inst, Dept Chem, Shenzhen 518055, Peoples R China 4.Southern Univ Sci & Technol, Guangdong Prov Key Lab Energy Mat Elect Power, Shenzhen 518055, Peoples R China 5.Cent South Univ, Hunan Joint Int Res Ctr Carbon Dioxide Resource Ut, Sch Phys & Elect, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China |
Recommended Citation GB/T 7714 |
Zhou, Dinghua,Li, Fusheng,Zhao, Yilong,et al. Mechanistic Regulation by Oxygen Vacancies in Structural Evolution Promoting Electrocatalytic Water Oxidation[J]. ACS CATALYSIS,2023.
|
APA |
Zhou, Dinghua.,Li, Fusheng.,Zhao, Yilong.,Wang, Linqin.,Zou, Haiyuan.,...&Fan, Ke.(2023).Mechanistic Regulation by Oxygen Vacancies in Structural Evolution Promoting Electrocatalytic Water Oxidation.ACS CATALYSIS.
|
MLA |
Zhou, Dinghua,et al."Mechanistic Regulation by Oxygen Vacancies in Structural Evolution Promoting Electrocatalytic Water Oxidation".ACS CATALYSIS (2023).
|
Files in This Item: | There are no files associated with this item. |
|
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment