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

Author:

Liang Jiaming,Liu Jiangtao,Guo LishengORCID,Wang Wenhang,Wang Chengwei,Gao Weizhe,Guo Xiaoyu,He YingluoORCID,Yang GuohuiORCID,Yasuda ShuheiORCID,Liang BingORCID,Tsubaki NoritatsuORCID

Abstract

AbstractTuning 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.

Funder

National Natural Science Foundation of China

MEXT | Japan Society for the Promotion of Science

JST SPRING (JPMJSP2145) Liaoning province unveils science and technology project

Publisher

Springer Science and Business Media LLC

Subject

General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry,Multidisciplinary

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