Highly efficient and 100 % selectivity of CO generation via CO2 Photoreduction over a novel CsBr@CuBr2 Heterojunction

To address the global challenge posed by excessive carbon dioxide emissions, our research pioneers the transformation of CO 2 into valuable hydrocarbon fuels. Central to this approach is the innovation of photocatalysts, engineered to exhibit exceptional photoresponse characteristics. In this research, the CsBr@CuBr 2 photocatalyst was innovatively synthesized through a straightforward and effective one-pot method. The catalyst displayed remarkable efficacy, achieving a CO 2 photoreduction rate of 201.47 μmol g −1 within just 4 h. The incorporation of CsBr into CuBr 2 effectively captures excited-state electrons, thereby significantly enhancing charge separation efficiency. Utilizing in situ DRIFTS and DFT theoretical analysis, the experiment reveals the complex process of CO 2 photoreduction to CO. The results of this experiment provide breakthrough insights for the systematic design of metal bromide heterostructures, which possess robust CO 2 adsorption/activation potential and notable stability.