Modulating the electronic spin state by constructing dual-metal atomic pairs for activating the dynamic site of oxygen reduction reaction

被引：0
作者：
Shenghua Ye
Shuhua Xie
Yaqi Lei
Xiuyuan Yang
Jing Hu
Lirong Zheng
Zhida Chen
Yonghuan Fu
Xiangzhong Ren
Yongliang Li
Xiaoping Ouyang
Qianling Zhang
Jianhong Liu
Xueliang Sun
机构：
[1] Shenzhen University,College of Chemistry and Environmental Engineering, Graphene Composite Research Center
[2] University of Western Ontario,Department of Mechanical and Materials Engineering
[3] Shenzhen Eigen-Equation Graphene Technology Co. Ltd.,School of Materials Science and Engineering
[4] Institute of High Energy Physics Chinese Academy of Sciences,undefined
[5] Xiangtan University,undefined
来源：
Nano Research | 2023年 / 16卷 / 2期
关键词：
manganese (Mn)-iron (Fe) binuclear sites; synergistic effect; spin state; oxygen reduction reaction;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In this study, dual-metal atomic pairs of manganese (Mn)-iron (Fe) binuclear sites (BNSs) with two conjoint MnN4 and FeN4 moieties (MnFeN8) anchored onto a graphite-like structure (GLS) (Mn-Fe BNSs/GLS) were constructed. The binuclear MnFeN8 structure was verified experimentally and theoretically. Magnetic measurements and Gaussian calculations reveal that this unique Mn-Fe BNSs exhibit strong short-range electronic interaction between Mn and Fe sites, which decouples two paired d electrons in Fe sites, thereby transforming Fe sites from an intermediate to a high spin state. The optimal electronic configuration of Fe sites and their binuclear structure facilitate an oxygen reduction reaction (ORR) thermodynamically and dynamically, respectively, endowing Mn-Fe BNSs with improved ORR performance.
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页码：1869 / 1877
页数：8
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