文献类型：期刊文献

英文题名：Transition metals (Fe, Co, and Ni) encapsulated in nitrogen-doped carbon nanotubes as bi-functional catalysts for oxygen electrode reactions

作者：Liu, Yanyan[1];Jiang, Hongliang[1];Zhu, Yihua[1];Yang, Xiaoling[1];Li, Chunzhong[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China

年份：2016

卷号：4

期号：5

起止页码：1694

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20160601894934);WOS:【SCI-EXPANDED(收录号:WOS:000368839200019)】；

基金：This work was supported by the National Natural Science Foundation of China (2471056 and 21236003), the Basic Research Program of Shanghai (13NM1400700, 13NM1400701), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Electrocatalysts - Electrolysis - Metal nanoparticles - Yarn - Nanocatalysts - Oxygen - Platinum compounds - Nitrogen - Transition metals - Electrodes - Electrolytic reduction - Carbon nanotubes - Fuel cells - Ruthenium compounds - Doping (additives) - Secondary batteries

摘要：The development of efficient and cheap bifunctional oxygen electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) to be applied in rechargeable metal-air batteries and unitized generative fuel cells (URFCs) operated with alkaline electrolytes is highly crucial and challenging. Here we report high-performance bifunctional electrocatalysts of transition metal nanoparticles encapsulated in nitrogen-doped carbon nanotubes (M/N-CNTs, M = Fe, Co, and Ni). The optimized Co/N-CNT hybrid shows the highest efficient bifunctional catalytic activity and excellent stability towards both the ORR and OER. The oxygen electrode activity parameter DE (the criteria for judging the overall catalytic activity of bifunctional electrocatalysts) value for Co/N-CNTs is 0.78 V, which surpasses those of Pt/C and RuO2 catalysts and most of the non-precious metal based bifunctional electrocatalysts reported in the previous literature studies. Furthermore, excellent long-term catalytic durability holds great promise in fields of renewable energy applications.