Improvement of oxygen evolution activity on isolated Mn sites by dual-heteroatom coordination

被引：31

作者：

Bai, Xue ^{[1
]}

Han, Jingyi ^{[1
]}

Chen, Siyu ^{[1
]}

Niu, Xiaodi ^{[2
]}

Guan, Jingqi ^{[1
]}

机构：

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

[2] Jilin Univ, Coll Food Sci & Engn, Changchun 130062, Jilin, Peoples R China

来源：

CHINESE JOURNAL OF CATALYSIS | 2023年 / 54卷

基金：

中国国家自然科学基金;

关键词：

Dual-heteroatom ligand; In-situ Raman; Oxygen evolution reaction; Single atom catalyst; Theoretical calculation; REDUCTION; NANOSHEETS; CATALYSTS; CARBON;

D O I：

10.1016/S1872-2067(23)64525-5

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The coordination of dual-heteroatom is an effective strategy to enhance the performance of oxygen evolution reaction (OER) of single-atom catalysts. Here, we synthesize Mn-SG-500 with isolated Mn sites coordinated with two sulfur and two oxygen atoms on graphene, and perform in-depth research on the structure-activity relationship for the OER. Under alkaline conditions, the Mn-SG-500 displays higher OER activity than commercial RuO2. Combining insitu structure analysis and theoretical calculations, we identify Mn-S2O2 as the catalytic active center, on which the oxidation of *O to *OOH is the rate-control step. The improved OER activity is attributed to the redistribution and optimization of Mn charges caused by the co-coordination of S and O. This work is helpful for further structure design and performance management of single-atom catalysts with dual-heteroatom doping.(c) 2023, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.

引用

页码：212 / 219

页数：8

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