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Tandem Catalysis for CO2 Hydrogenation to C-2-C-4 Hydrocarbons

机译:二氧化碳氢化至C-2-C-4烃的串联催化

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Conversion of carbon dioxide to C-2-C-4 hydrocarbons is a major pursuit in clean energy research. Despite tremendous efforts, the lack of well-defined catalysts in which the spatial arrangement of interfaces is precisely controlled hinders the development of more efficient catalysts and in-depth understanding of reaction mechanisms. Herein, we utilized the strategy of tandem catalysis to develop a well-defined nanostructured ( catalyst CeO2 Pt@mSiO," Co for converting CO, to Cy C4 hydro- 0 carbons using two metal-oxide interfaces. C-2-C-4 hydrocarbons are found to be produced with high (60%) selectivity, which is speculated to be the result of the two-step tandem process uniquely allowed by this catalyst. Namely, the Pt/CeO2 interface converts CO, and Hy to CO, and on the neighboring Co/mSiO(2) interface yields C-2-C-4 hydrocarbons through a subsequeht Fischer Tropsch process. In addition, the catalysts show no obvious deactivation over 40 h. The successful production of C, C4 hydrocarbons via a tandem process on a rationally designed, structurally well-defined catalyst demonstrates the power of sophisticated structure control in designing nanostructured catalysts for multiple-step chemical conversions.
机译:二氧化碳转化为C-2-C-4烃是清洁能源研究的主要追求。尽管巨大努力,但缺乏明确定义的催化剂,其中界面的空间排列精确控制阻碍了更有效的催化剂的发展和对反应机制的深入了解。在此,我们利用串联催化的策略,用于使用两个金属氧化物界面将CO,CO,CY C4氢化碳的催化剂(催化剂CEO2 PT @ MSIO,“CO,”C-2-C-4发现碳氢化合物具有高(60%)的选择性产生,这试图是该催化剂唯一允许的两步串联过程的结果。即,Pt / CeO2接口转换CO,以及HY到CO,以及HY在相邻的CO / MSIO(2)界面上,通过随后的Fischer Tropsch工艺产生C-2-C-4烃。此外,催化剂没有超过40小时的明显失活。通过串联成功生产C,C4烃类碳氢化合物结构设计的结构明确定义的催化剂的方法证明了设计纳米结构催化剂的复杂结构控制的功率,用于多步化学转化。

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