Chinese Journal of Catalysis

Chinese Journal of Catalysis ›› 2017, Vol. 38 ›› Issue (3): 434-439.DOI: 10.1016/S1872-2067(17)62800-6

• Special Column on New Porous Catalytic Materials • Previous Articles     Next Articles

Reductive transformation of CO2: Fluoride-catalyzed reactions with waste silicon-based reducing agents

Ken Motokura, Masaki Naijo, Sho Yamaguchi, Akimitsu Miyaji, Toshihide Baba   

  1. Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8502, Japan
  • Received:2016-09-27 Revised:2016-10-20 Online:2017-03-18 Published:2017-03-22
  • Supported by:

    This work was supported by JSPS KAKENHI (15H04182), JSPS Grant-in-Aid for Scientific Research on Innovative Areas “3D Active-Site Science (26105003)”, “Precisely Designed Catalysts with Customized Scaffolding (16H01010)”, and Grant for Challenging Research Award, Tokyo Institute of Technology.

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Abstract:

CO2 is one of the most important “renewable” carbon sources. To transform CO2 to useful organic compounds, we examined the reactivity of two model silicon-based “waste” materials, disilanes and metallic Si powder, as reducing agents. In these reactions, fluoride salts were found to be active catalysts: CO2 was converted to formic acid at atmospheric pressure in the presence of H2O as a proton source and the silicon-based reducing reagents. Based on in-situ NMR and kinetics analyses, a hydrosilane and penta-coordinate Si species are proposed as the reaction intermediate and active species, respectively.

Key words: Carbon dioxide, Fluoride, Homogeneous catalysis, Formic acid, Disilane