Light-driven conversion of CO2 into chemicals/fuels is a desirable approach for achieving carbon neutral-ity using clean and sustainable energy.However,its scale-up application is restricted due to insufficient efficiency.Herein,we present a photothermal catalytic hydrogenation of CO2 into CH4 over Ru/black TiO2 catalysts,aiming to achieve the synergistic use of light and heat in solar energy during CO2 conversion.Owing to the desirable spectral response ability and photothermal conversion performance of black TiO2,an efficient combination of photocatalysis and thermocatalysis has been established.The CO2 hydrogena-tion was significantly accelerated because of the increased catalyst surface temperature enabled by the photothermal effect of black TiO2.Simultaneously,through the in situ X-ray photoelectron spectroscopy(XPS)observation,electron-rich Ru nanoparticles was achieved based on the photo-induced excitation,thereby providing more negative hydride to improve nucleophilic attack to the CO2,obtaining the CH4 yield of 93.8％.

School of Environmental Science and Engineering,State Key Lab of Metal Matrix Composites,Shanghai Jiao Tong University,Shanghai 200240,China;Center of Hydrogen Science,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Institute of Pollution Control and Ecological Security,Shanghai 200092,China;Department of Materials Science and Engineering,Michigan Technological University,Houghton,Michigan 49931-1295,United States

[1]Binbin Jin;Xin Ye;Heng Zhong;Fangming Jin;Yun Hang Hu-.Enhanced photocatalytic CO2 hydrogenation with wide-spectrum utilization over black TiO2 supported catalyst)[J].中国化学快报（英文版）,2022(02):812-816

thermocatalysis,hydrogena

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