Mn-doped CsPb(Br/Cl) mixed-halide perovskites for CO photoreduction.

Halide perovskites have been employed as photocatalysts for CO photoreduction due to their excellent optical properties and unique electronic structure. However, their photocatalytic performance is relatively poor. Herein, we demonstrate a new strategy with Mn-doped CsPb(Br/Cl) mixed-halide perovskites as catalysts to enhance the efficiency of CO photoreduction. By tuning the content of Mn, a series of CsPb(Br/Cl):Mn perovskites are obtained and show high efficiency in CO conversion to CO and CH. For the optimum catalyst sample, especially, the yields of CO and CH reach 1917 μmol g and 82 μmol g which are 14.2 and 1.4 times higher than those of CsPbBr. This work provides new insights into improving the reactivity of perovskites in CO photoreduction.