Engineering the coordination structure of Cu for enhanced photocatalytic production of C1 chemicals from glucose
Photocatalytic decomposition of sugars is a promising way of providing H2,CO,and HCOOH as sus-tainable energy vectors.However,the production of C1 chemicals requires the cleavage of robust C-C bonds in sugars with concurrent production of H2,which remains challenging.Here,the photo-catalytic activity for glucose decomposition to HCOOH,CO(C1 chemicals),and H2 on Cu/TiO2 was enhanced by nitrogen doping.Owing to nitrogen doping,atomically dispersed and stable Cu sites resistant to light irradiation are formed on Cu/TiO2.The electronic interaction between Cu and nitrogen ions originates valence band structure and defect levels composed of N 2p orbit,distinct from undoped Cu/TiO2.Therefore,the lifetime of charge carriers is prolonged,resulting in the pro-duction of C1 chemicals and H2 with productivities 1.7 and 2.1 folds that of Cu/TiO2.This work pro-vides a strategy to design coordinatively stable Cu ions for photocatalytic biomass conversion.
Cu photocatalystCoordination structureBiomassC-C bondC1 chemicals
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