CO2 hydrogenation over Fe-Co bimetallic catalysts with tunable selectivity through a graphene fencing approach

Jiaming Liang, Jiangtao Liu, Lisheng Guo (), Wenhang Wang, Chengwei Wang, Weizhe Gao, Xiaoyu Guo, Yingluo He, Guohui Yang, Shuhei Yasuda (), Bing Liang () and Noritatsu Tsubaki ()
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Jiaming Liang: University of Toyama
Jiangtao Liu: Shenyang University of Chemical Technology
Lisheng Guo: Anhui University
Wenhang Wang: University of Toyama
Chengwei Wang: University of Toyama
Weizhe Gao: University of Toyama
Xiaoyu Guo: University of Toyama
Yingluo He: University of Toyama
Guohui Yang: University of Toyama
Shuhei Yasuda: University of Toyama
Bing Liang: Shenyang University of Chemical Technology
Noritatsu Tsubaki: University of Toyama

Nature Communications, 2024, vol. 15, issue 1, 1-13

Abstract: Abstract Tuning CO2 hydrogenation product distribution to obtain high-selectivity target products is of great significance. However, due to the imprecise regulation of chain propagation and hydrogenation reactions, the oriented synthesis of a single product is challenging. Herein, we report an approach to controlling multiple sites with graphene fence engineering that enables direct conversion of CO2/H2 mixtures into different types of hydrocarbons. Fe-Co active sites on the graphene fence surface present 50.1% light olefin selectivity, while the spatial Fe-Co nanoparticles separated by graphene fences achieve liquefied petroleum gas of 43.6%. With the assistance of graphene fences, iron carbides and metallic cobalt can efficiently regulate C-C coupling and olefin secondary hydrogenation reactions to achieve product-selective switching between light olefins and liquefied petroleum gas. Furthermore, it also creates a precedent for CO2 direct hydrogenation to liquefied petroleum gas via a Fischer-Tropsch pathway with the highest space-time yields compared to other reported composite catalysts.

Date: 2024
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DOI: 10.1038/s41467-024-44763-9

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