Atomically Dispersed Mn within Carbon Frameworks as High-Performance Oxygen Reduction Electrocatalysts for Zinc-Air Battery
Atomically Dispersed Mn within Carbon Frameworks as High-Performance Oxygen Reduction Electrocatalysts for Zinc-Air Battery
复制标题
碳骨架中原子分散的锰作为锌空气电池的高性能氧还原电催化剂
DOI：
10.1021/acssuschemeng.9b05713
复制
发表时间：
2020-01-13
影响因子：
8.4
通讯作者：
Chen, Qianwang
中科院分区：
文献类型：
--
作者：
Lin, Zhiyu;Huang, Hao;Chen, Qianwang
Manganese (Mn)-based catalysts are generally not active for the oxygen reduction reaction (ORR) under alkaline conditions. Herein, a Mn-SA electrocatalyst consisted of atomically dispersed pyridinic-N-coordinated Mn atoms within carbon frameworks was prepared. The electrocatalyst exhibited excellent performance for ORR (E-1/2 = 0.87 V) and zinc-air batteries under alkaline conditions, which is superior to that of most Mn-based catalysts and the commercial Pt/C catalyst. Density functional theory (DFT) calculations reveal that the nearest coordination environment can tailor the intrinsic catalytic activity of Mn centers via turning their electronic structure. The high activity of the pyridinic-N-coordinated Mn configuration is attributed to the modest adsorption strength for ORR intermediates and the reasonable position of the d-band center, which boost the ORR process.
