Unraveling the Enhanced Kinetics of Sr ₂ Fe _{1+ x} Mo _{1‐ x} O _6‐δ Electrocatalysts for High‐Performance Solid Oxide Cells (Adv. Energy Mater. 48/2021)

Perovskites In article number 2102845, Xian-Zhu Fu and co-workers report that partial substitution of Mo by Fe in a perovskite of Sr2Fe1+xMo1−xO6−δ shifts up the O p band energy closer to the Fermi level, which lowers O vacancy formation as well as the O migration barrier energy, significantly accelerating the catalytic reaction kinetics in H2 oxidation and CO2 reduction reactions.