Isolated Single-Atomic Ru Catalyst Bound on a Layered Double Hydroxide for Hydrogenation of CO2 to Formic Acid

作者：Kohsuke Mori, Tomohisa Taga, Hiromi Yamashita · 发表于：ACS Catalysis · 年份：2017 · DOI：10.1021/acscatal.7b00312 · 被引用次数：269 · 研究领域：Carbon dioxide utilization in catalysis、CO2 Reduction Techniques and Catalysts、Catalysts for Methane Reforming

In order to achieve an economical CO 2 -mediated hydrogen energy cycle, the development of heterogeneous catalysts for CO 2 hydrogenation to formic acid is an urgent and challenging task. In this study, a stable and well-defined single-site Ru catalyst on the surface of a layered double hydroxide (LDH) in a basic medium is proven to be efficient for selective hydrogenation of CO 2 to formic acid under mild reaction conditions (2.0 MPa, 100 °C). The electron-donating ability of triads of basic hydroxyl ligands with a particular location is crucial for an active electron-rich Ru center. There is a strong correlation between catalytic activity and adjustable CO 2 adsorption capacity in the vicinity of the Ru center. Such electronic metal–support interactions and a CO 2 concentration effect result in a significant positive influence on the catalytic activity.