First-principles study of oxygen evolution on Co3O4 with short-range ordered Ir doping

被引：9

作者：

Li, Yaping ^{[1
]}

Zhang, Zhuang ^{[1
]}

Tan, Guoying ^{[1
]}

Kumar, Anuj ^{[2
]}

Liu, Hai ^{[1
]}

Yang, Xue ^{[1
]}

Gao, Wenqin ^{[1
]}

Bai, Lu ^{[3
]}

Chang, Huaiqiu ^{[3
]}

Kuang, Yun ^{[1
]}

Sun, Xiaoming ^{[1
]}

机构：

[1] Beijing Univ Chem Technol, Coll Chem, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

[2] GLA Univ, Inst Humanities & Appl Sci, Dept Chem, Mathura 281406, India

[3] Natl Ctr Nanosci & Technol, CAS Key Lab Standardizat & Measurement Nanotechnol, Beijing 100190, Peoples R China

来源：

MOLECULAR CATALYSIS | 2023年 / 535卷

基金：

北京市自然科学基金;

关键词：

First; -principles; Oxygen evolution reaction; O; OH coverage; Short-range ordered; Solvation effect; TOTAL-ENERGY CALCULATIONS; WATER; ELECTROLYSIS; ELECTROCATALYSTS; REDUCTION; OXIDATION;

D O I：

10.1016/j.mcat.2022.112852

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：

The large overpotential of oxygen evolution reaction (OER) in water-splitting process prevented its application in energy field, researchers attempted to find efficient catalysts. Here, we used short-range ordered Ir-doped Co3O4 (100) model to study the OER performance under various coordination conditions through first-principles calculations. This doping pattern enabled the model to display three types of active sites, included single Ir/Co site and double Ir sites, which were different in terms of propensity to adsorb reaction intermediates. The OER performance of three types of active sites with the same O and OH coverage was evaluated, we found that O covered surface increased OER catalytic activity for single Ir/Co site. While for double Ir sites, it exhibited the lowest overpotential among the above three types, and O/OH coverage had a little influence on its activity. Furthermore, Bader charge and partial density of states analyses showed that, for single Ir/Co site, the overpotential on covered surface was reduced due to the valence electrons decrease at the metal site. While for double Ir sites, the overpotential reduction was due to the unique adsorption patterns. Additionally, the solvation effect was considered. It was found that the solvation had a key effect on the adsorption energy depending on the binding site of the intermediate. But the overpotential trend in solvent was similar with that in vacuum on the same active site.

引用

页数：11