Highly efficient and active Co-N-C catalysts for oxygen reduction and Zn-air batteries

被引：2
|
作者：
Lei, Cong [1 ]
Yang, Rongzhong [1 ]
Zhao, Jianan [1 ]
Tang, Wenbin [1 ]
Miao, Fadong [1 ]
Huang, Qinghong [1 ]
Wu, Yuping [1 ]
机构：
[1] Nanjing Tech Univ, Sch Energy Sci & Engn, Nanjing 211816, Peoples R China
来源：
FRONTIERS IN ENERGY | 2024年 / 18卷 / 04期
基金：
中国国家自然科学基金;
关键词：
oxygen reduction reaction (ORR); oxygen evolution reaction (OER); non-noble metal catalysts; Co-N-C catalysts; Zn-air battery; DOPED CARBON; NITROGEN; ELECTROCATALYST; NANOPARTICLES; POLYANILINE; NANOFIBERS; GRAPHENE;
D O I：
10.1007/s11708-024-0928-6
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
In this study, the Lewis doping approach of polyaniline (PANI) was employed to fabricate cobait-nitrogen-carbon (Co-N-C) oxygen electrocatalysts for Zn-air batteries, aiming to enhance the active spots of Co-N-C. This resulting Co-N-C catalysts exhibited well-defined nanofiber networks, and the Brunauer-Emmett-Teller (BET) analysis confirmed their substantial specific surface area. Electrochemical experiments demonstrated that the Co-N-C catalysts achieved the half-wave potential (vs. RHE) of 0.85 V in alkaline medium, overcoming Pt/C and iron-nitrogen-carbon (Fe-N-C) counterparts in extended cycle testing with only a 25 mV change in a half-wave potential after 5000 cycles. Remarkably, the highest power density measured in the zinc (Zn)-air battery reached 227 mW/cm2, a significant improvement over the performance of 101 mW/cm2 of the platinum on activated carbon (Pt/C) catalyst. These findings highlight the advantageous stability enhancement associated with the utilization of Co in the Co-N-C catalysts.
引用
收藏
页码：436 / 446
页数：11
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