A site doped Sr₂Fe_1.4 Ni_0.1Mo_0.5O_6-δ (SFNM), i.e., La_0.1Sr_1.9Fe_1.4Ni_0.1Mo_0.5O_6-δ (LSFNM) and Pr_0.1Sr_1.9Fe_1.4Ni_0.1Mo_0.5O_6-δ (PSFNM) materials have been synthesized by sol-gel method in air and investigated as anode catalysts for intermediate temperature solid oxide fuel cells. Metallic nanoparticle-decorated ceramic anodes were prepared by in situ reduction of the LSFNM and PSFNM in H₂ at 850 °C, forming Ruddlesden−Popper structure and FeNi₃ bimetallic alloy nanoparticle catalyst. The electrochemical performance of the doped SFNM ceramic anode is greatly enhanced by A site La or Pr doping due to the ~50% decrease of the polarization resistance. The maximum power densities of the LSGM (320μm) electrolyte supported single cells with LSFNM and PSFNM as the anode reached 1.142 and 1.084 W cm⁻² in wet H₂ at 850 °C, respectively. LSFNM and PSFNM are promising high-performance anodes for solid oxide fuel cells.

Acknowledgements: Financial support from the U.S. National Science Foundation (DMR–1832809) is greatly appreciated.