A Ce/Ru Codoped SrFeO 3−δ Perovskite for a Coke-Resistant Anode of a Symmetrical Solid Oxide Fuel Cell

作者：Bangxin Li, Shuai He, Jibiao Li, Xiangling Yue, John T. S. Irvine, Deti Xie, Jiupai Ni, Chengsheng Ni · 发表于：ACS Catalysis · 年份：2020 · DOI：10.1021/acscatal.0c03554 · 被引用次数：112 · 研究领域：Advancements in Solid Oxide Fuel Cells、Electronic and Structural Properties of Oxides、Magnetic and transport properties of perovskites and related materials

Employment of identical oxides for the cathode and anode in a symmetrical solid oxide fuel cell (SSOFC) is beneficial for decreasing the fabrication costs of a robust cell. Ce doping on the A site of SrFeO 3 increased the structural stability in a reducing atmosphere, but ceria was found to exsolve from the perovskite during the cooling process in the air if the doping level reached 20 atom %. The additional doping of 5 atom % Ru in Sr 0.8 Ce 0.2 FeO 3 on the Fe site could prevent the ceria segregation in air and induce the surface decomposition under fuel conditions for the formation of nanoscale SrO, CeO 2, and Ru 0 . The SSOFC with Ce/Ru codoped SrFeO 3 on a Sr- and Mg-doped LaGaO 3 electrolyte showed a small R p value (0.12 Ω cm 2 ) when H 2 and ambient air were used as fuel and oxidant, respectively. The peak power densities of 846 and 310 mW cm –2 were achieved at 800 °C using H 2 and C 3 H 8 as fuel, respectively. The excellent coke resistance of the anode could be related to the simultaneous in situ exsolution of CeO 2, SrO, and Ru 0 nanoparticles.