Synthesis of lead-free Cs<sub>3</sub>Sb<sub>2</sub>Br<sub>9</sub> perovskite alternative nanocrystals with enhanced photocatalytic CO<sub>2</sub> reduction activity
Chang Lü, Dominique S. Itanze, Alexander G. Aragon, Xiao Ma, Hui Li, K. B. Üçer, Corey A. Hewitt, David Carroll, R. T. Williams, Yejun Qiu, Scott M. Geyer
Abstract
A synthetic method for uniform and pure Cs3Sb2Br9 NCs has been developed. Cs3Sb2Br9 NCs exhibit a 10-fold increase in activity for the photocatalytic CO2 reduction reaction compared to CsPbBr3 NCs, achieving 510 μmol CO g-1 cat. after 4 h. Density functional theory shows that Cs3Sb2Br9 surfaces sufficiently expose Sb to allow reactivity, as opposed to the unreactive CsPbBr3 surface.
Topics & Concepts
NanocrystalPerovskite (structure)Materials sciencePhotocatalysisReduction (mathematics)Inorganic chemistryChemical engineeringMineralogyNanotechnologyCrystallographyChemistryCatalysisBiochemistryEngineeringMathematicsGeometryPerovskite Materials and ApplicationsAdvanced Photocatalysis TechniquesQuantum Dots Synthesis And Properties