Electrode-Ligand Interactions Dramatically Enhance CO2 Conversion to CO by the [Ni(cyclam)](PF6)2 Catalyst
ACS Catalysis2017Vol. 7(8), pp. 5282–5288
Citations Over TimeTop 14% of 2017 papers
Yueshen Wu, Benjamin Rudshteyn, Almagul Zhanaidarova, Jesse D. Froehlich, Wendu Ding, Clifford P. Kubiak, Víctor S. Batista
Abstract
Dramatic enhancement of electrochemical CO2 conversion to CO, catalyzed by [Ni(cyclam)](PF6)2 is observed on mercury/gold electrodes. We find that Hg provides favorable noncovalent dispersive interactions with the cyclam ligand. As a result, the Hg surface destabilizes the poisoned CO-bound form of the catalyst, leading to enhanced reaction kinetics. These findings are particularly relevant to the design of ligands that improve the electrocatalytic performance of transition-metal complexes on interaction with metallic surfaces under cell operating conditions.
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