Synergy between isolated Fe and Co sites accelerates oxygen evolution

被引：50

作者：

Tang, Tianmi ^{[1
]}

Duane, Zhiyao ^{[2
]}

Baimanov, Didar ^{[3
,4
,5
]}

Bai, Xue ^{[1
]}

Liu, Xinyu ^{[6
]}

Wang, Liming ^{[3
,4
]}

Wang, Zhenlu ^{[1
]}

Guan, Jingqi ^{[1
]}

机构：

[1] Jilin Univ, Inst Phys Chem, Coll Chem, 2519 Jiejang Rd, Changchun 130021, Peoples R China

[2] Northwestern Polvtechn Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

[3] Chinese Acad Sci, Inst High Energy Phys, CAS Key Lab Biomed Effects Nanomat & Nanosafety, Beijing 100049, Peoples R China

[4] Chinese Acad Sci, Inst High Energy Phys, CASHKU Joint Lab Metall Hlth & Environm, Beijing 100049, Peoples R China

[5] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[6] ShanghaiTech Univ, Sch Phys Sci & Technol, 393 Middle Iluaxia Rd, Shanghai 201210, Peoples R China

来源：

NANO RESEARCH | 2023年 / 16卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Co-N-C; Fe-N-C; oxygen evolution reaction; dual-atom catalysis; theoretical calculation; ATOMIC DISPERSION; WATER OXIDATION; REDUCTION; CATALYSTS; GRAPHENE; NI;

D O I：

10.1007/s12274-022-5001-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Dual-metal catalysts with synergistic effect exhibit enormous potential for sustainable electrocatalytic applications and mechanism research. Compared with mono-metal-site catalysts, dual-metal-site catalysts exhibit higher efficiency for the oxygen evolution reaction (OER) due to reduced energy barrier of the process involving proton-coupled multi-electron transfer. Herein, we construct dual-metal Fe-Co sites coordinated with nitrogen in graphene (FeCo-NG), which exhibits high OER performance with onset overpotential of only 126 mV and Tafel slope of 120 mV-dec(-1), showing that the rate-determining step is controlled by the single -electron transfer step. Theoretical calculations reveal that the FeN4 site exhibits lower OER overpotential than the CoN4 site due to appropriate adsorption energy of OOH* on the former, while the O* adsorbed on the adjacent Co site could stabilize the OOH* on the FeN4 site through hydrogen bond interaction.

引用

页码：2218 / 2223

页数：6

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