碳化物
催化作用
材料科学
氢
环境压力
水煤气变换反应
化学工程
铜
可再生能源
镍
制氢
冶金
化学
有机化学
物理
电气工程
工程类
热力学
作者
Zhongling Li,Wen‐Hong Wu,Menglin Wang,Yanan Wang,Xinlong Ma,Lei Luo,Yue Chen,Kuo-Chin Fan,Yang Pan,Hongliang Li,Jie Zeng
标识
DOI:10.1038/s41467-022-29971-5
摘要
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.
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