Chinese Journal of Catalysis ›› 2018, Vol. 39 ›› Issue (8): 1427-1435.DOI: 10.1016/S1872-2067(18)63107-9

• Articles • Previous Articles    

Induced growth of Fe-Nx active sites using carbon templates

Shiming Zhanga,b,c, Heyou Zhangb, Weimin Zhanga, Xianxia Yuana, Shengli Chenb, Zi-Feng Maa,c   

  1. a Department of Chemical Engineering, Shanghai Electrochemical Energy Devices Research Center, Shanghai Jiao Tong University, Shanghai 200240, China;
    b College of Chemistry and Molecular Sciences, Hubei Key Laboratory of Electrochemical Power Sources, Key Laboratory of Analytical Chemistry for Biology and Medicine(Ministry of Education), Wuhan University, Wuhan 430072, Hubei, China;
    c Sinopoly Battery Research Center, Shanghai Sinopoly Jiahua Battery Technology Co., Ltd., Shanghai 200241, China
  • Received:2018-01-04 Revised:2018-05-27 Online:2018-08-18 Published:2018-07-04
  • Contact: 10.1016/S1872-2067(18)63107-9
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21606149, 2163308), the China Postdoctoral Science Foundation (2016M591678), the Shanghai Rising-Star Program (18QB1404400), and the Shanghai Scientific Research Project (18511110803).

Abstract:

Highly active Fe-Nx sites that effectively improve the performance of non-precious metal electrocatalysts for oxygen reduction reactions (ORRs) are desirable. Herein, we propose a strategy for introducing a carbon template into a melamine/Fe-salt mixture to inductively generate highly active Fe-Nx sites for ORR. Using 57Fe Mössbauer spectroscopy, X-ray photoelectron spectroscopy, and X-ray diffraction, we studied the structural composition of the Fe and N co-doped carbon catalysts. Interestingly, the results showed that this system not only converted inactive Fe and Fe-carbides into active Fe-N4 and other Fe-nitrides, but also improved their intrinsic activities.

Key words: Oxygen reduction reaction, Non-precious-metal electrocatalyst, Fe-Nx, Induced growth, Carbon template