CO2 electroreduction activity and dynamic structural evolution of in situ reduced nickel-indium mixed oxides

Nickel-indium mixed oxides catalyse electrochemical CO 2 reduction with high CO selectivity (71%), contrasting NiO (H 2 > 90%) and In 2 O 3 (HCOO − > 80%). Dynamic structural transformations dependent on bias and time are observed during operation.