Li Zhongling, Wu Wenlong, Wang Menglin, Wang Yanan, Ma Xinlong, Luo Lei, Chen Yue, Fan Kaiyuan, Pan Yang, Li Hongliang, Zeng Jie
Hefei National Research Center for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, National Synchrotron Radiation Laboratory, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026, PR China.
Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, PR China.
Nat Commun. 2022 May 3;13(1):2396. doi: 10.1038/s41467-022-29971-5.
The conversion of CO by renewable power-generated hydrogen is a promising approach to a sustainable production of long-chain olefins (C) which are currently produced from petroleum resources. The decentralized small-scale electrolysis for hydrogen generation requires the operation of CO 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 C 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 C. This work contributes to the development of small-scale low-pressure devices for CO hydrogenation compatible with sustainable hydrogen production.
利用可再生能源发电产生的氢气将一氧化碳转化，是可持续生产长链烯烃（C）的一种有前景的方法，目前长链烯烃是由石油资源生产的。用于制氢的分散式小规模电解需要在常压装置中进行一氧化碳加氢操作，以匹配制造规模并实现灵活的按需生产。在此，我们报道了一种铜铁催化剂，该催化剂在常压下运行，其C选择性（66.9%）与在高压（35巴）下优化的现有催化剂（66.8%）相当。该催化剂由铜、氧化铁和碳化铁组成。氧化铁促使逆水煤气变换反应生成一氧化碳。碳化铁上的碳化物路径与铜和碳化铁之间界面位点上的一氧化碳插入路径的协同作用，导致碳 - 碳有效偶联生成C。这项工作有助于开发与可持续制氢兼容的小规模低压一氧化碳加氢装置。
