过电位
电催化剂
双功能
析氧
材料科学
电池(电)
双功能催化剂
化学工程
化学
无机化学
催化作用
电极
电化学
物理化学
工程类
有机化学
功率(物理)
物理
量子力学
作者
Yu Chen,Xiaoting Cao,Ruili Song,Lvzhou Li,Xu Dong,Jiangnan Li,Xi Wang,Xiaoshuang Zhou,Ningyi Yuan,Jianning Ding
标识
DOI:10.1016/j.jallcom.2022.168679
摘要
Low-cost, highly stable, and high-performance non-precious metal bifunctional oxygen reduction/oxygen evolution reaction (ORR/OER) electrocatalysts ensure the large-scale commercialization of rechargeable Zn–air batteries. In this study, we obtained an efficient bifunctional electrocatalyst ([email protected]2P-NC) using pyrolysis and subsequent phosphorylation of ZIF-67 after the addition of an iron source. The excellent ORR activity is primarily attributed to the FeCo-NC sites, while Co2P is the active site for high-performance OER. Therefore, the obtained [email protected]2P-NC has high onset and half-wave potentials for the ORR and a low overpotential for the OER, indicating its excellent bifunctional activity. It exhibited a reversible oxygen overpotential that exceeded that of commercial Pt/C and RuO2. In addition, the Zn–air battery with the [email protected]2P-NC catalyst had a high peak power density and cycling stability, exhibiting better performance than the commercial 20 % Pt/C-RuO2. Therefore, this study provides a new strategy for the rational design of efficient non-precious metal electrocatalysts for energy storage and conversion.
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