Citation: Fu-Shao LI, Ying-Xian XU, Qing-Qing WU, Hu-Jun SHEN, Ming-Sen DENG. Anode Material Sr₂MgMoO₆: Preparation and Catalytic Performance[J]. Chinese Journal of Inorganic Chemistry, ;2022, 38(10): 2028-2036. doi: 10.11862/CJIC.2022.187 shu

Anode Material Sr₂MgMoO₆: Preparation and Catalytic Performance

Guizhou Provincial Key Laboratory of Computational Nano-material Science, Guizhou Education University, Guiyang 550018, China

Corresponding author: Fu-Shao LI, lifushao@126.com Ming-Sen DENG, deng@gznc.edu.cn
Received Date: 12 April 2022
Revised Date: 18 July 2022

Figures(8)

Double-perovskite oxide Sr₂MgMoO₆ (SMMO) was prepared as anode material for solid-oxide fuel cells by the sol-gel route. The effect of the material preparation scenario on the phase constituents, transport property, and catalyzing activity for H₂ oxidization was investigated. The results show that the preparation process of SMMO requires strict control, and a phase-pure sample with a double-perovskite structure can be hardly synthesized by a one-step annealing reaction, and a high purity grade of SMMO requires the repeated thorough mixing and full annealing. In the meanwhile, impurity phase SrMoO₄ in a very small amount is almost unavoidable. The impure substance in samples affects a great deal of the electrical conductivity of this material, and a purer sample exhibits better conductive performance. The purity of SMMO has a tremendous impact on the electrochemical performance of this material, and a purer sample exhibits a lower anode interfacial resistance, a higher catalyzing activity for H₂ oxidizing, and a larger power output of the corresponding single cell. At a temperature of 800 ℃, the area-specific resistance of the SMMO anode was as low as 1.07 Ω·cm², and power output from the corresponding single cell reached to 710 mW·cm^-2.
- solid-oxide fuel cell,
- anode,
- double-perovskite,
- electrochemical performance
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Anode Material Sr₂MgMoO₆: Preparation and Catalytic Performance