双功能
电催化剂
碳化
材料科学
电池(电)
纳米颗粒
纳米技术
催化作用
碳纤维
阳极
碳纳米管
化学工程
析氧
电极
化学
电化学
有机化学
物理化学
功率(物理)
复合材料
工程类
物理
复合数
量子力学
扫描电子显微镜
作者
Baohua Zhang,Meiying Wu,Liang Zhang,Yun Feng Xu,Wei Hou,Huazhang Guo,Liang Wang
标识
DOI:10.1016/j.jcis.2022.09.014
摘要
Accelerating the sluggish anode reaction in a Zn-air battery can improve its energy efficiency, but the large-scale development of this battery is hindered by the lack of bifunctional catalysts. Herein, we designed a one-step carbonization strategy for synthesizing monodispersed Co nanoparticles supported on N-doped carbon nanotube (Co/CNT), which shows excellent bifunctional electrocatalytic performance with long-term durability for oxygen reduction reaction/oxygen evolution reaction. The formation of carbon substrates from the carbonization of nitrogenous organic molecules are benefit to capture more Co nanoparticles though strong metal-substrate interaction, then construct high-density effective active sites of the Lewis base for accelerating the electrocatalytic reaction process. To verify its superior performance, a rechargeable Zn-air battery with a Co/CNT air electrode was subsequently constructed. The battery exhibits an open-circuit voltage of 1.41 V and a specific discharge capacity of 835.2 mAh/gZn, which can be continuously charged and discharged with good cycle stability. Our study provides a new strategy for developing various practical carbon-based non-noble metallic bifunctional electrocatalysts with promising performance in electrocatalysis and batteries to achieve the target of carbon neutrality.
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