Covalent organic polymers derived carbon incorporated with cobalt oxides as a robust oxygen reduction reaction catalyst for fuel cells

被引:25
作者
Yang, Wei [1 ]
Li, Jun [2 ]
Lan, Linghan [2 ]
Zhang, Yudong [2 ]
Liu, Hongtao [1 ]
机构
[1] Sichuan Univ, Coll Water Resource & Hydropower, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Peoples R China
[2] Chongqing Univ, Sch Energy & Power Engn, Inst Engn Thermophys, Chongqing 400030, Peoples R China
关键词
Fuel cell; Oxygen reduction reaction; Covalent organic polymer; Cobalt oxide; Tolerance; CATHODE CATALYSTS; AIR-CATHODE; NITROGEN; ELECTROCATALYSTS; NANOSHEETS; FE; PERFORMANCE; NANOTUBES; GRAPHENE; CO;
D O I
10.1016/j.cej.2020.124581
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Synthesizing high efficient oxygen reduction reaction catalyst is crucial for electrochemical technologies such as fuel cells. Herein, we proposed a covalent organic polymers derived carbon with cobalt oxides incorporation (Co/N-C-COPs) as ORR electrocatalysts for fuel cells. The Co/N-C-COPs was demonstrated to possess sufficient active sites and uniformly dispersed cobalt and nitrogen elements. The as-prepared Co/N-C-COPs at 800 degrees C showed the best ORR catalytic activity with a half-wave potential (-0.16 V vs. Ag/AgCl) and limiting current density (3.99 mA cm(-2)) similar to that of Pt/C (-0.15 V vs. Ag/AgCl and 4.05 mA cm(-2)) in alkaline media. When using the Co/N-C-COPs as cathode electrocatalyst, two types of home-made fuel cells (microbial fuel cell and direct formate fuel cell) delivered a comparable or even higher power output than that using Pt/C, due to its intriguing features including high catalytic activity, high poison tolerance and good durability. These results suggested that the as-proposed Co/N-C-COPs catalyst probably provide an alternative avenue for developing the cathode electrocatalysts for fuel cell applications.
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页数:8
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