| 초록 |
The photocatalytic conversion of CO2 and water into value-added chemicals remains a great challenge. This study shows that uniformly mixed copper and iron oxide bulky heterojunction films are capable of converting CO2 and water into C1–C6 aliphatic acid anions and O2 at a solar-to-chemical energy conversion efficiency close to 3% under simulated sunlight in the absence of any sacrificial chemicals or electrical biases. When the CFO film is simply wired to a Pt foil, C1 and O2 are produced at a near-stoichiometric ratio at an STC efficiency of ∼5% via the Z-scheme charge transfer mechanism. The CFO films are durable over 1 week and recyclable over 5 weeks under continuous irradiation. Density functional theory computations support the observed selectivity and durability. This research was supported by the National Research Foundation of Korea (2019R1A2C2002602, 2018R1A6A1A03024962 and 2019R1I1A1A01059163). |
