Impact of Cu+ and Cu2+ species on the oxide-metal transition processes of CuxO foams during the CO2RR probed by operando Quick-XAS

Operando Quick-XAS is used to study the reduction kinetics of Cu x O foams during the CO 2 RR. The oxide-metal transition potential strongly depends on the initial abundance of Cu 2+ species, precursor structure and type of chronoamperometric experiment.