Mn-doped CsPb(Br/Cl)3 mixed-halide perovskites for CO2 photoreduction

For the excellent optical property and unique electronic structure, halide perovskite has been employed as a photocatalyst for CO2 photoreduction. However, the photocatalytic performance is relatively poor. Herein, we demonstrate a new strategy with Mn-doped CsPb(Br/Cl)3 mixed-halide perovskites as catalysts to enhance the efficiency of CO2 photoreduction. Via tuning the content of Mn, a serial of CsPb(Br/Cl)3:Mn perovskites are obtained and show high efficiency in CO2 conversion to CO and CH4. Especially, for the optimum catalyst of sample, the yields of CO and CH4 are up to 1917 μmol/g and 82 μmol/g which are 14.2 and 1.4 folds higher than the ones of CsPbBr3. This work provides new insights to improve the reactivity of perovskites in CO2 photoreduction.