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

Halide perovskites have been employed as photocatalysts for CO₂ 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)₃ mixed-halide perovskites as catalysts to enhance the efficiency of CO₂ photoreduction. By tuning the content of Mn, a series of CsPb(Br/Cl)₃:Mn perovskites are obtained and show high efficiency in CO₂ conversion to CO and CH₄. For the optimum catalyst sample, especially, the yields of CO and CH₄ reach 1917 μmol g^-1 and 82 μmol g^-1 which are 14.2 and 1.4 times higher than those of CsPbBr₃. This work provides new insights into improving the reactivity of perovskites in CO₂ photoreduction.