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

Authors :
Zhai, Jianxin
Xia, Zhanghui
Zhou, Baowen
Wu, Haihong
Xue, Teng
Chen, Xiao
Jiao, Jiapeng
Jia, Shuaiqiang
He, Mingyuan
Han, Buxing
Source :
Nature Communications; 2/6/2024, Vol. 15 Issue 1, p1-9, 9p
Publication Year :
2024

Abstract

Upcycling of CO<subscript>2</subscript> 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/MnO<subscript>x</subscript> catalyst composed of well-defined Ru/MnO/Mn<subscript>3</subscript>O<subscript>4</subscript> for photo-thermal catalytic CO<subscript>2</subscript> hydrogenation to CH<subscript>4</subscript>, which is the result of a combination of external heating and irradiation. Remarkably, under relatively mild conditions of 200 °C, a considerable CH<subscript>4</subscript> production rate of 166.7 mmol g<superscript>−1</superscript> h<superscript>−1</superscript> was achieved with a superior selectivity of 99.5% at CO<subscript>2</subscript> conversion of 66.8%. The correlative spectroscopic and theoretical investigations suggest that the yield of CH<subscript>4</subscript> 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 CO<subscript>2</subscript> hydrogenation toward CH<subscript>4</subscript>. Reduction of CO<subscript>2</subscript> with solar energy is an attractive route to new fuel sources. Here a nanostructured Ru/MnO<subscript>x</subscript> photo-thermal catalyst composed of well-defined Ru/MnO/Mn<subscript>3</subscript>O<subscript>4</subscript> is reported for CO<subscript>2</subscript> hydrogenation with high selectivity and a CH<subscript>4</subscript> production rate at a mild temperature of 200 °C. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
20411723
Volume :
15
Issue :
1
Database :
Complementary Index
Journal :
Nature Communications
Publication Type :
Academic Journal
Accession number :
175279711
Full Text :
https://doi.org/10.1038/s41467-024-45389-7