Chinese Journal of Applied Chemistry ›› 2022, Vol. 39 ›› Issue (10): 1543-1553.DOI: 10.19894/j.issn.1000-0518.220048

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Effectively Improving the Electrocatalytic Activity of PrBaMn2O5+δ Anode by Doping Co, Ni and Fe

Ya-Wei TANG1,2, Lan-Lan XU1, Xiao-Juan LIU1,2()   

  1. 1.State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
    2.University of Science and Technology of China,Hefei 230026,China
  • Received:2022-02-22 Accepted:2022-04-27 Published:2022-10-01 Online:2022-10-05
  • Contact: Xiao-Juan LIU
  • About author:lxjuan@ciac.ac.cn
  • Supported by:
    the China Academy of Engneering Phycics NSAF Joiut Fund of National Natural Science Foundation of China(U2130114)

Abstract:

The development of efficient anode materials plays an important role in the large-scale commercialization of solid oxide fuel cell (SOFC). Based on the design concept of component engineering, PrBaMn1.6X0.4O5+δ (PBMX,X = Co,Ni,Fe) layered perovskite anodes are synthesized by simple B-site doping transition metals into Pr0.5Ba0.5MnO3-δ . The effect of doping with different transition metals on the microstructure and electrochemical properties of PrBaMn2O5+δ(PBMO) is systematically investigated, and the effect of A-site defects on the PBMX anodes is further analyzed. The results show that the doping effect of Co and Ni is obviously better than that of Fe, PrBaMn1.6Co0.4O5+δ (PBMC) and PrBaMn1.6Ni0.4O5+δ (PBMN) will generate more oxygen vacancies during the reduction process, and the electrochemical properties of the materials are better. Among them, PBMC has the highest catalytic activity as an anode material, with a polarization resistance of 0.170 Ω·cm2 and a peak power density of 874 mW/cm2 at 800 ℃ in H2, showing that the enhancement of the electrochemical activity is due to the enhancement of the surface roughness and the increase of oxygen vacancies. In addition, the introduction of A-site deficiency can improve the performance of PBMX, the polarization resistance of P0.6BMC is only 0.090 Ω·cm2 and the peak power density is 952 mW/cm2 at 800 ℃.

Key words: Element-doped, Surface oxygen vacancy, Solid oxide fuel cell, Anode

CLC Number: