Photo-thermal coupling to enhance CO2 hydrogenation toward CH4 over Ru/MnO/Mn3O4

Jianxin Zhai, Zhanghui Xia, Baowen Zhou (), Haihong Wu (), Teng Xue, Xiao Chen, Jiapeng Jiao, Shuaiqiang Jia, Mingyuan He () and Buxing Han ()
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Jianxin Zhai: East China Normal University
Zhanghui Xia: East China Normal University
Baowen Zhou: Shanghai Jiao Tong University
Haihong Wu: East China Normal University
Teng Xue: East China Normal University
Xiao Chen: East China Normal University
Jiapeng Jiao: East China Normal University
Shuaiqiang Jia: East China Normal University
Mingyuan He: East China Normal University
Buxing Han: East China Normal University

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Upcycling of CO2 into fuels by virtually unlimited solar energy provides an ultimate solution for addressing the substantial challenges of energy crisis and climate change. In this work, we report an efficient nanostructured Ru/MnOx catalyst composed of well-defined Ru/MnO/Mn3O4 for photo-thermal catalytic CO2 hydrogenation to CH4, which is the result of a combination of external heating and irradiation. Remarkably, under relatively mild conditions of 200 °C, a considerable CH4 production rate of 166.7 mmol g−1 h−1 was achieved with a superior selectivity of 99.5% at CO2 conversion of 66.8%. The correlative spectroscopic and theoretical investigations suggest that the yield of CH4 is enhanced by coordinating photon energy with thermal energy to reduce the activation energy of reaction and promote formation of key intermediate COOH* species over the catalyst. This work opens up a new strategy for CO2 hydrogenation toward CH4.

Date: 2024
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DOI: 10.1038/s41467-024-45389-7

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