Unraveling the evolution of exsolved Fe–Ni alloy nanoparticles in Ni-doped La 0.3 Ca 0.7 Fe 0.7 Cr 0.3 O 3− δ and their role in enhancing CO 2 –CO electrocatalysis

In situ exsolved Fe–Ni nanoparticles anchored on a (La 0.3 Ca 0.7 ) 0.95 Fe 0.7 Cr 0.25 Ni 0.05 O 3− δ parent perovskite surface significantly enhance the CO oxidation kinetics, thus reaching excellent activity of the CO 2 reduction reaction.