Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (9): 20220341.doi: 10.7503/cjcu20220341

• Article • Previous Articles     Next Articles

S-doped Fe-N-C as Catalysts for Highly Reactive Oxygen Reduction Reactions

CHENG Qian, YANG Bolong, WU Wenyi, XIANG Zhonghua()   

  1. State Key Laboratory of Organic?Inorganic Composites,Beijing University of Chemical Technology,Beijing 100029,China
  • Received:2022-05-14 Online:2022-09-10 Published:2022-06-24
  • Contact: XIANG Zhonghua E-mail:xiangzh@mail.buct.edu.cn
  • Supported by:
    the National Key Research and Development Program of China(2017YFA0206500)

Abstract:

In this paper, a series of S-doped Fe-N-C catalysts were prepared by introducing Fe(NO33·9H2O and KSCN in a methanol-water two-solvent system using microwave heating and high-temperature pyrolysis techniques with ZIF-8 as the precursor. The results were analyzed by several characterization means such as X-ray powder diffraction, scanning transmission electron microscopy, and nitrogen adsorption and desorption tests. The results indicated that the reasonable introduction of both Fe and S resulted in Fe3C/Fe-SAS@SNC catalysts with obvious graded porous structure and specific surface area of 673 m2/g, which exhibited excellent catalytic performance for oxygen reduction in both acid and alkaline electrolytes. In 0.1 mol/L KOH, the half-wave potential of the Fe3C/Fe-SAS@SNC was 0.880 V(vs. RHE), which is higher than that of commercial Pt/C catalysts, and exhibited better stability than commercial Pt/C. In addition, the Fe3C/Fe-SAS@SNC electrocatalytic oxygen reduction performance in 0.5 mol/L H2SO4 is similarly comparable to that of commercial Pt/C catalysts.

Key words: Nonnoble metal catalyst, Heteroatom doping, Oxygen reduction reaction

CLC Number: 

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