Photocatalytic reduction of CO2 into value-added products is a promising strategy for mitigating environmental and energy problems simultaneously.Herein,we developed Au sheets with subtle grain boundaries on ultrathin...Photocatalytic reduction of CO2 into value-added products is a promising strategy for mitigating environmental and energy problems simultaneously.Herein,we developed Au sheets with subtle grain boundaries on ultrathin Ni(OH)2 nanosheets as efficient photocatalysts for CO2 reduction.According to mechanistic studies,grain boundaries on the Au sheets served as electron trapping sites which enabled the optimization of electron-hole separation.Moreover,grain boundaries perturbed electron distribution,which assisted in stabilizing CO2^δ- and HCOO^* intermediates.As a result,the unique hybrid structure achieved a high rate of 75.2μmol g^-1h^-1 for CO2 photoreduction.This work demonstrates the importance of defect engineering in designing active photocatalysts and also provides insight into development of related photo-energy conversion schemes.展开更多
基金This work was supported by the National Science Fund for Distinguished Young Scholars(21925204)the National Natural Science Foundation of China(U19A2015,21673214,U1732272)+5 种基金the National Key Research and Development Program of China(2019YFA-0405600)the Key Research Program of Frontier Sciences of the CAS(QYZDB-SSW-SLH017)the Fundamental Research Funds for the Central Universities,the USTC Research Funds of the Double First-Class Initiative(YD2340002002)the Taishan Scholar Program of Shandong Province of China(tsqn201909122)the China Postdoctoral Science Foundation(2019TQ0300)This work was partially carried out at the USTC Center for Micro and Nanoscale Research and Fabrication.
文摘Photocatalytic reduction of CO2 into value-added products is a promising strategy for mitigating environmental and energy problems simultaneously.Herein,we developed Au sheets with subtle grain boundaries on ultrathin Ni(OH)2 nanosheets as efficient photocatalysts for CO2 reduction.According to mechanistic studies,grain boundaries on the Au sheets served as electron trapping sites which enabled the optimization of electron-hole separation.Moreover,grain boundaries perturbed electron distribution,which assisted in stabilizing CO2^δ- and HCOO^* intermediates.As a result,the unique hybrid structure achieved a high rate of 75.2μmol g^-1h^-1 for CO2 photoreduction.This work demonstrates the importance of defect engineering in designing active photocatalysts and also provides insight into development of related photo-energy conversion schemes.
