Efficient coupling of the light absorber with the catalyst is the most critical step for multi-electron transfer processes of carbon dioxide reduction. With the goal of demonstrating robust, light absorber-catalyst assemblies for converting CO2 to high energy product, we systematically investigated a heterogenized system on Nafion film as a platform for coupling of light absorber (i.e., Ru-(bpy)32+) and catalysts (i.e., fac-Re(bpy)(CO)3Cl). Ru-complex/Nafion/Re-complex system clearly demonstrated the higher photocatlytic conversion efficiency (up to 1.5 times) and the highly enhanced the photostability compared with those in the well-known homogeneous sensitizing system without Nafion (Ru-complex/Re-coplex). The roles of the Nafion in this system are proposed to be twofold: to provide binding sites for cationic light absorber and to enhance the charge transfer kinetics from light absorber to catalyst. The details including the coupling, and charge transfer properties between Ru-(bpy)32+ or fac-Re(bpy)(CO)3Cl, and Nafion will be presented.

Efficient assembly of light absorber-catalyst for photocatalytic CO2 reduction using perfluorosulfonate polymer

256th National Meeting (2018)

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