期刊
CHEMISTRYSELECT
卷 3, 期 17, 页码 4831-4837出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.201800979
关键词
Co/N-codoping; Electrocatalyst; Hierarchically hollow structure; Oxygen reduction reaction; Porous carbon
资金
- Fundamental Research Funds for the Central Universities [2015ZM151]
- Guangdong Innovative and Entrepreneurial Research Team Program [2014ZT05N200]
- National Natural Science Foundation of China [21403274, 11474101]
The development of low-cost, highly efficient, and durable electrocatalysts for oxygen reduction reaction (ORR) is vital to commercialization of a new generation of rechargeable metal-air batteries and fuel cells. Here we report a facile, efficient, template-assisted strategy for fabrication of hierarchically porous Co, N-codoped carbon hollow structures as ORR eletrocatalysts. The unique architecture of the catalyst was constructed through in situ growth of Co-based zeolitic imidazolate framework (ZIF-67) on the surface of carboxylated polystyrene (PS) nanosphere and pyrolysis for removal of PS and carbonization of ZIF-67. The resulting catalyst exhibited outstanding ORR activity in both alkaline and acidic electrolyte solution, comparable to that of a commercial Pt/C catalyst, and better than those reported for most Co, N-codoped carbon catalysts. Such superior performance is attributed to the unique features of the catalyst: large specific surface area, openly exposed active sites, high content of the pyridinic-N and graphitic-N active sites, and fast transfer of electrons and ions. Moreover, the catalyst also displayed much better tolerance to methanol and durability than the commercial Pt/C catalyst, ascribed to strong coupling of active sites and highly graphitic carbon sheets. Further, the simple, effective and low-cost synthesis strategy for creation of hierarchically porous electrodes is applicable to fabrication of other energy storage and conversion devices as well.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据