Abstract
Li-doped CuFeO2 thin films are fabricated by electrodeposition and their photoelectrocatalytic performance for CO2 reduction is examined. CuFeO2, LiFeO2, Cu2O and CuO are observed in Li-doped CuFeO2 thin films. At Li-doped CuFeO2 thin film photocathodes, CO2 can be reduced to methanol with high selectivity. At the overpotential of 110 mV, methanol concentration is up to 153.75 μM and faradaic efficiency of methanol is as high as 96.7% in 1.5 h at the photocathode electrodeposited at −1.00 V. Since adsorbed CO has low mobility on LiFeO2 surface, CO coupling on the electrode surface is inhibited, thus no C2+ products are formed.
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