Ambient-pressure hydrogenation of CO2 into long-chain olefins

Zhongling Li, Wenlong Wu, Menglin Wang, Yanan Wang, Xinlong Ma, Lei Luo, Yue Chen, Kaiyuan Fan, Yang Pan, Hongliang Li () and Jie Zeng ()
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Zhongling Li: University of Science and Technology of China
Wenlong Wu: University of Science and Technology of China
Menglin Wang: University of Science and Technology of China
Yanan Wang: Songshan Lake Materials Laboratory
Xinlong Ma: University of Science and Technology of China
Lei Luo: University of Science and Technology of China
Yue Chen: University of Science and Technology of China
Kaiyuan Fan: University of Science and Technology of China
Yang Pan: University of Science and Technology of China
Hongliang Li: University of Science and Technology of China
Jie Zeng: University of Science and Technology of China

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract The conversion of CO2 by renewable power-generated hydrogen is a promising approach to a sustainable production of long-chain olefins (C4+=) which are currently produced from petroleum resources. The decentralized small-scale electrolysis for hydrogen generation requires the operation of CO2 hydrogenation in ambient-pressure units to match the manufacturing scales and flexible on-demand production. Herein, we report a Cu-Fe catalyst which is operated under ambient pressure with comparable C4+= selectivity (66.9%) to that of the state-of-the-art catalysts (66.8%) optimized under high pressure (35 bar). The catalyst is composed of copper, iron oxides, and iron carbides. Iron oxides enable reverse-water-gas-shift to produce CO. The synergy of carbide path over iron carbides and CO insertion path over interfacial sites between copper and iron carbides leads to efficient C-C coupling into C4+=. This work contributes to the development of small-scale low-pressure devices for CO2 hydrogenation compatible with sustainable hydrogen production.

Date: 2022
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DOI: 10.1038/s41467-022-29971-5

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