High Photothermally Active Fe₂O₃ Film for CO₂ Photoreduction with H₂O Driven by Solar Light

A Fe2O3 film exhibited high activity for CO2 photoreduction with H2O under high solar light intensity and temperature. CH4, C2H4 and C2H6 were detected simultaneously, and the maximum generation rates reached 1470.7, 736.2, and 277.2 μmol/(gcata·h), respectively. These results prove the feasibility of the novel approach, and the suitability of iron oxide as a photothermally active catalyst. The noteworthy performance of Fe2O3 was arising from the beneficial contribution of the highly photothermal conditions and the formation of a Fe2O3/Fe3O4 Z-scheme system. The study elucidates the feasibility of photothermal synergistic catalytic effect for solar energy utilization in CO2 photoreduction.