Chem. J. Chinese Universities ›› 2020, Vol. 41 ›› Issue (8): 1843.doi: 10.7503/cjcu20200155

• Physical Chemistry • Previous Articles     Next Articles

Enhancement of Performance of Fe-N-C Catalysts by Copper and Sulfur Doping for the Oxygen Reduction Reaction

WANG Yuemin1,2, MENG Qinglei1,2, WANG Xian1,2, GE Junjie1,2, LIU Changpeng1,2, XING Wei1,2   

  1. 1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
    2. School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
  • Received:2020-03-20 Online:2020-08-10 Published:2020-05-03
  • Supported by:
    Supported by the National Science and Technology Major Project, China(No.2017YFB0102900), the National Natural Science Foundation of China(Nos.21633008, 21433003) and the Jilin Province Science and Technology Development Program, China(No.20170203003SF).

Abstract: A series of nonnoble metal oxygen reduction electrocatalysts was prepared using FeCl3·6H2O, Cu(NO3)2·3H2O, KSCN, mildly oxidized BP-2000 and melamine as iron source, copper source, sulfur source, carbon source and nitrogen source, respectively. The morphology and structure of the catalysts were characterized by transmission electron microscopy(TEM), X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS) and inductively coupled plasma atomic emission spectroscopy(ICP-AES). Then the oxygen reduction performances of the catalysts were evaluated by rotating disk and rotating disk ring tests, and the effect of copper and sulfur doping on catalysts performance was analyzed. The results demonstrate that sulfur doping can significantly promote turnover frequency(TOF) values of Fe-N-C catalysts than copper doping, and effectively reduce peroxide yields. In addition, the copper and sulfur doped Fe-N-C catalyst possesses higher TOF value and lower peroxide yield than the undoped Fe-N-C catalyst. The activation of Fe-Nx sites by sulfur doping and the synergistic effect of adjacent copper-based sites improve the activity and selectivity of the catalysts for oxygen reduction reaction.

Key words: Fuel cell, Oxygen reduction reaction, Electrocatalysis, Nonnoble metal catalyst

CLC Number: 

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