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

作者：Jiaming Liang, Jiangtao Liu, Lisheng Guo, Wenhang Wang, Chengwei Wang, Weizhe Gao, Xiaoyu Guo, Yingluo He, Guohui Yang, Shuhei Yasuda, Bing Liang, Noritatsu Tsubaki · 发表于：Nature Communications · 年份：2024 · DOI：10.1038/s41467-024-44763-9 · 被引用次数：102 · 研究领域：Catalysts for Methane Reforming、Catalysis for Biomass Conversion、Catalytic Processes in Materials Science

Abstract Tuning CO 2 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 CO 2 /H 2 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 CO 2 direct hydrogenation to liquefied petroleum gas via a Fischer-Tropsch pathway with the highest space-time yields compared to other reported composite catalysts.