Integrated Photothermal Nanoreactors for Efficient Hydrogenation of CO2

To alleviate the energy crisis and global warming,photo thermal catalysis is an attractive way to efficiently convert COand renewable Hinto value-added fuels and chemicals.However,the catalytic performance is usually restricted by the trade-off between the dispersity and light absorption property of metal catalysts.Here we demonstrate a simple SiO2-protected metalorganic framework pyrolysis strategy to fabricate a new type of integrated photothermal nanoreactor with a comparatively high metal loading,dispersity,and stability.The core-satellite structured Co@SiOexhibits strong sunlight-absorptive ability and excellent catalytic activity in COhydrogenation,which is ascribed to the functional separation of different sizes of Co nanoparticles.Large-sized plasmonic Co nanoparticles are mainly responsible for the light absorption and conversion to heat(nanoheaters),whereas small-sized Co nanoparticles with high intrinsic activities are responsible for the catalysis(nanoreactors).This study provides a new concept for designing efficient photothermal catalytic materials.