Neighboring Site Synergies in Co-Defective Ru-Co Spinel Oxide toward Oxygen Evolution Reaction

Shencheng Pan; Lili Zhang; Mingliang Liu; Xinchen Pan; Min Bi; Tong Guo; Ying Zhang; Jingwen Sun; Alexander Vasiliev; Xiaoping Ouyang; Xin Wang; Junwu Zhu; Yongsheng Fu

doi:10.1021/acssuschemeng.2c05465

Neighboring Site Synergies in Co-Defective Ru-Co Spinel Oxide toward Oxygen Evolution Reaction

Shencheng Pan, Lili Zhang, Mingliang Liu, Xinchen Pan, Min Bi, Tong Guo, Ying Zhang, Jingwen Sun, Alexander Vasiliev, Xiaoping Ouyang, Xin Wang, Junwu Zhu, Yongsheng Fu

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

As is well known that the oxygen evolution reaction (OER) is dominant to determine water splitting, regulating the electronic structure of the electrocatalyst has been demonstrated to be an effective strategy for improving OER activity. Herein, Ru-Co spinel oxides with abundant cobalt vacancies (V_Co-RCO) are successfully developed as a highly efficient electrocatalyst for OER. Interestingly, the introduction of Ru can induce the formation of cobalt vacancies, which can modulate the electronic state of V_Co-RCO, optimizing the location of the d-band center and generating neighboring Ru-Co synergies, thereby improving the OER catalytic activity. As a result, the V_Co-RCO exhibits a small overpotential of 240 mV at 10 mA/cm², which is more advanced than that of Co₃O₄, RCO without defect, and various RuO₂ catalysts. The in situ Raman analysis and density functional theory calculations further confirm the neighboring Ru-Co synergies of V_Co-RCO, and this mechanism can not only facilitate fast electron transfer between Ru and Co sites through the bridging OOH but also reduce the adsorption strength of OER intermediates, leading to a significant enhancement of OER catalytic activity.

Original language	English
Pages (from-to)	290-299
Number of pages	10
Journal	ACS Sustainable Chemistry and Engineering
Volume	11
Issue number	1
DOIs	https://doi.org/10.1021/acssuschemeng.2c05465
State	Published - 9 Jan 2023
Externally published	Yes

Keywords

cobalt vacancy
DFT calculation
electronic structure
neighboring site synergy
oxygen evolution reaction

ASJC Scopus subject areas

General Chemistry
Environmental Chemistry
General Chemical Engineering
Renewable Energy, Sustainability and the Environment

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10.1021/acssuschemeng.2c05465

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@article{2045105400264fe4a6477bed360ccd95,

title = "Neighboring Site Synergies in Co-Defective Ru-Co Spinel Oxide toward Oxygen Evolution Reaction",

abstract = "As is well known that the oxygen evolution reaction (OER) is dominant to determine water splitting, regulating the electronic structure of the electrocatalyst has been demonstrated to be an effective strategy for improving OER activity. Herein, Ru-Co spinel oxides with abundant cobalt vacancies (VCo-RCO) are successfully developed as a highly efficient electrocatalyst for OER. Interestingly, the introduction of Ru can induce the formation of cobalt vacancies, which can modulate the electronic state of VCo-RCO, optimizing the location of the d-band center and generating neighboring Ru-Co synergies, thereby improving the OER catalytic activity. As a result, the VCo-RCO exhibits a small overpotential of 240 mV at 10 mA/cm2, which is more advanced than that of Co3O4, RCO without defect, and various RuO2 catalysts. The in situ Raman analysis and density functional theory calculations further confirm the neighboring Ru-Co synergies of VCo-RCO, and this mechanism can not only facilitate fast electron transfer between Ru and Co sites through the bridging OOH but also reduce the adsorption strength of OER intermediates, leading to a significant enhancement of OER catalytic activity.",

keywords = "cobalt vacancy, DFT calculation, electronic structure, neighboring site synergy, oxygen evolution reaction",

author = "Shencheng Pan and Lili Zhang and Mingliang Liu and Xinchen Pan and Min Bi and Tong Guo and Ying Zhang and Jingwen Sun and Alexander Vasiliev and Xiaoping Ouyang and Xin Wang and Junwu Zhu and Yongsheng Fu",

note = "Publisher Copyright: {\textcopyright} 2022 American Chemical Society.",

year = "2023",

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day = "9",

doi = "10.1021/acssuschemeng.2c05465",

language = "English",

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TY - JOUR

T1 - Neighboring Site Synergies in Co-Defective Ru-Co Spinel Oxide toward Oxygen Evolution Reaction

AU - Pan, Shencheng

AU - Zhang, Lili

AU - Liu, Mingliang

AU - Pan, Xinchen

AU - Bi, Min

AU - Guo, Tong

AU - Zhang, Ying

AU - Sun, Jingwen

AU - Vasiliev, Alexander

AU - Ouyang, Xiaoping

AU - Wang, Xin

AU - Zhu, Junwu

AU - Fu, Yongsheng

PY - 2023/1/9

Y1 - 2023/1/9

N2 - As is well known that the oxygen evolution reaction (OER) is dominant to determine water splitting, regulating the electronic structure of the electrocatalyst has been demonstrated to be an effective strategy for improving OER activity. Herein, Ru-Co spinel oxides with abundant cobalt vacancies (VCo-RCO) are successfully developed as a highly efficient electrocatalyst for OER. Interestingly, the introduction of Ru can induce the formation of cobalt vacancies, which can modulate the electronic state of VCo-RCO, optimizing the location of the d-band center and generating neighboring Ru-Co synergies, thereby improving the OER catalytic activity. As a result, the VCo-RCO exhibits a small overpotential of 240 mV at 10 mA/cm2, which is more advanced than that of Co3O4, RCO without defect, and various RuO2 catalysts. The in situ Raman analysis and density functional theory calculations further confirm the neighboring Ru-Co synergies of VCo-RCO, and this mechanism can not only facilitate fast electron transfer between Ru and Co sites through the bridging OOH but also reduce the adsorption strength of OER intermediates, leading to a significant enhancement of OER catalytic activity.

AB - As is well known that the oxygen evolution reaction (OER) is dominant to determine water splitting, regulating the electronic structure of the electrocatalyst has been demonstrated to be an effective strategy for improving OER activity. Herein, Ru-Co spinel oxides with abundant cobalt vacancies (VCo-RCO) are successfully developed as a highly efficient electrocatalyst for OER. Interestingly, the introduction of Ru can induce the formation of cobalt vacancies, which can modulate the electronic state of VCo-RCO, optimizing the location of the d-band center and generating neighboring Ru-Co synergies, thereby improving the OER catalytic activity. As a result, the VCo-RCO exhibits a small overpotential of 240 mV at 10 mA/cm2, which is more advanced than that of Co3O4, RCO without defect, and various RuO2 catalysts. The in situ Raman analysis and density functional theory calculations further confirm the neighboring Ru-Co synergies of VCo-RCO, and this mechanism can not only facilitate fast electron transfer between Ru and Co sites through the bridging OOH but also reduce the adsorption strength of OER intermediates, leading to a significant enhancement of OER catalytic activity.

KW - cobalt vacancy

KW - DFT calculation

KW - electronic structure

KW - neighboring site synergy

KW - oxygen evolution reaction

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DO - 10.1021/acssuschemeng.2c05465

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Neighboring Site Synergies in Co-Defective Ru-Co Spinel Oxide toward Oxygen Evolution Reaction

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Keywords

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