杂原子
电催化剂
催化作用
双功能
电化学
析氧
碳纤维
阴极
锌
氧气
材料科学
无机化学
化学工程
化学
纳米技术
电极
物理化学
有机化学
复合数
复合材料
工程类
戒指(化学)
作者
Botao Hu,Aijian Huang,Xuejiang Zhang,Zheng Chen,Renyong Tu,Wei Zhu,Zhongbin Zhuang,Chen Chen,Qing Peng,Yadong Li
出处
期刊:Nano Research
[Springer Nature]
日期:2021-05-23
卷期号:14 (10): 3482-3488
被引量:127
标识
DOI:10.1007/s12274-021-3535-4
摘要
Metal-nitrogen-carbon (M-N-C) single-atom catalysts exhibit desirable electrochemical catalytic properties. However, the replacement of N atoms by heteroatoms (B, P, S, etc.) has been regarded as a useful method for regulating the coordination environment. The structure engineered M-N-C sites via doping heteroatoms play an important role to the adsorption and activation of the oxygen intermediate. Herein, we develop an efficient strategy to construct dual atomic site catalysts via the formation of a Co1-PN and Ni1-PN planar configuration. The developed Co1-PNC/Ni1-PNC catalyst exhibits excellent bifunctional electrocatalytic performance in alkaline solution. Both experimental and theoretical results demonstrated that the N/P coordinated Co/Ni sites moderately reduced the binding interaction of oxygen intermediates. The Co1-PNC/Ni1-PNC endows a rechargeable Zn-air battery with excellent power density and cycling stability as an air-cathode, which is superior to that of the benchmark Pt/C+IrO2. This work paves an avenue for design of dual single-atomic sites and regulation of the atomic configuration on carbon-based materials to achieve high-performance electrocatalysts.
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