Unravelling in-situ formation of highly active mixed metal oxide CuInO2 nanoparticles during CO2 electroreduction

Operando Raman spectroelectrochemistry: Raman spectra were recorded from the surface of Cu2O/ITO/FTO during one-hour CO2 electroreduction; here the normalization of Raman bands at 109 cm−1 and 136 cm−1, as a function of CO2 electroreduction time presented. The background represents the surface structure of delafossite CuInO2 segregated during one-hour CO2 ER on the surface of Cu2O/ITO/FTO.317