Thermally stable Ni foam-supported inverse CeAlOx/Ni ensemble as an active structured catalyst for CO2 hydrogenation to methane

Xin Tang, Chuqiao Song, Haibo Li, Wenyu Liu, Xinyu Hu, Qiaoli Chen, Hanfeng Lu, Siyu Yao (), Xiao-nian Li and Lili Lin ()
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Xin Tang: Zhejiang University of Technology
Chuqiao Song: Zhejiang University of Technology
Haibo Li: Zhejiang University of Technology
Wenyu Liu: Zhejiang University of Technology
Xinyu Hu: Zhejiang University of Technology
Qiaoli Chen: Zhejiang University of Technology
Hanfeng Lu: Zhejiang University of Technology
Siyu Yao: College of Chemical and Biological Engineering
Xiao-nian Li: Zhejiang University of Technology
Lili Lin: Zhejiang University of Technology

Nature Communications, 2024, vol. 15, issue 1, 1-12

Abstract: Abstract Nickel is the most widely used inexpensive active metal center of the heterogeneous catalysts for CO2 hydrogenation to methane. However, Ni-based catalysts suffer from severe deactivation in CO2 methanation reaction due to the irreversible sintering and coke deposition caused by the inevitable localized hotspots generated during the vigorously exothermic reaction. Herein, we demonstrate the inverse CeAlOx/Ni composite constructed on the Ni-foam structure support realizes remarkable CO2 methanation catalytic activity and stability in a wide operation temperature range from 240 to 600 °C. Significantly, CeAlOx/Ni/Ni-foam catalyst maintains its initial activity after seven drastic heating-cooling cycles from RT to 240 to 600 °C. Meanwhile, the structure catalyst also shows water resistance and long-term stability under reaction condition. The promising thermal stability and water-resistance of CeAlOx/Ni/Ni-foam originate from the excellent heat and mass transport efficiency which eliminates local hotspots and the formation of Ni-foam stabilized CeAlOx/Ni inverse composites which effectively anchored the active species and prevents carbon deposition from CH4 decomposition.

Date: 2024
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DOI: 10.1038/s41467-024-47403-4

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