过电位
双功能
材料科学
电池(电)
异质结
催化作用
析氧
化学工程
复合数
纳米技术
贵金属
金属
电极
光电子学
电化学
化学
复合材料
冶金
功率(物理)
物理
工程类
物理化学
量子力学
生物化学
作者
Ruilian Yin,Suli Ma,Jia-ping Ying,Zhihong Lu,Xinxin Niu,Jinxiu Feng,Feng Xu,Yifan Zheng,Wenxian Liu,Xiehong Cao
出处
期刊:Batteries
[MDPI AG]
日期:2023-06-02
卷期号:9 (6): 306-306
被引量:2
标识
DOI:10.3390/batteries9060306
摘要
The high activity and reliability of bifunctional oxygen catalysts are imperative for rechargeable metal–air batteries. However, the preparation of bifunctional non–noble metal electrocatalysts with multiple active sites remains a great challenge. Herein, an MOF–derived N–doped C–loaded uniformly dispersed CoO/MoC heterojunction catalyst for high–performance dual function was prepared by a simple “codeposition–pyrolysis” method. Experimental investigations revealed that the formation of the heterojunction can tailor the valence of Co and Mo sites, which impressively modulates the electronic properties of the active sites and promotes the electrocatalytic processes. The optimal catalyst reveals a high–wave half potential (E1/2 = 0.841 V) for ORR and a low overpotential (E10 = 348 mV) for OER. The NCCM–600–based Zn–air battery displays a high peak power density of 133.36 mW cm−2 and a prolonged cycling life of more than 650 h. This work provides avenues for the development of functional materials with enhanced properties in a variety of practical energy applications.
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