Investigation of composite Ni-doped perovskite anode catalyst for electrooxidation of hydrogen in solid oxide fuel cell

Ni-doped perovskite anodes have been investigated for oxidation of hydrogen in IT-SOFC. Perovskite materials are characterized by mixed electronic–ionic conductivity that combined to the high intrinsic catalytic activity of Ni allows to achieve high reaction rates. Suitable power densities of about 420 mW / cm 2 for the direct oxidation of hydrogen were achieved at 800 °C. Temperature programmed reduction analysis carried out in hydrogen reveals that the catalyst at 800 °C has totally lost the perovskite structure showing formation of substructures such as NiOOH and NiLa 2 O 4 .