Grafting of a Molecular Rhenium CO2 Reduction Catalyst onto Colloid-Imprinted Carbon

An aminophenethyl-substituted [Re(2,2’-bipyridine)(CO)<sub>3</sub>Cl] catalyst (<b>[Re(NH<sub>2</sub>-bpy)]</b>) was tethered to nanoporous colloid-imprinted carbon (CIC) electrode surfaces <i>via</i> an electrochemical oxidative grafting method. Hybrid CIC|<b>[Re(NH<sub>2</sub>-bpy)]</b> electrodes showed an improved stability and an increased loading per geometrical area in comparison to modified smooth glassy carbon electrodes. The catalyst also remained active upon immobilization and CO<sub>2</sub> was selectively reduced to CO by the CIC|<b>[Re(NH<sub>2</sub>-bpy)]</b> electrodes in acetonitrile with a Faradaic efficiency of 92 ± 6% and a Re-based TON of approximately 900.