Membrane-Modified Metal Triazole Complexes for the Electrocatalytic Reduction of Oxygen and Carbon Dioxide

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Authors

Supakul, Skye N.
Barile, Christopher J.

Issue Date

2018

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Article

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Keywords

electrocatalysis , carbon dioxide reduction , oxygen reduction , self-assembled monolayer , flip-flop diffusion , lipid monolayer

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Abstract

In this manuscript, an electrochemical architecture is designed that controls the kinetics of proton transfer to metal triazole complexes for electrocatalytic O-2 and CO2 reduction. Self-assembled monolayers of these catalysts are attached to a glassy carbon electrode and covered with a lipid monolayer containing proton carriers, which acts as a proton-permeable membrane. The O-2 reduction voltammograms on carbon are similar to those obtained on membrane-modified Au electrodes, which through the control of proton transfer rates, can be used to improve the selectivity of O-2 reduction. The improved voltage stability of the carbon platforms allows for the investigation of a CO2 reduction catalyst inside a membrane. By controlling proton transfer kinetics across the lipid membrane, it is found that the relative rates of H-2, CO, and HCOOH production can be modulated. It is envisioned that the use of these membrane-modified carbon electrodes will aid in understanding catalytic reactions involving the transfer of multiple protons and electrons.

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Citation

Supakul, S. N., & Barile, C. J. (2018). Membrane-Modified Metal Triazole Complexes for the Electrocatalytic Reduction of Oxygen and Carbon Dioxide. Frontiers in Chemistry, 6. doi:10.3389/fchem.2018.00543

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Creative Commons Attribution 4.0 International

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2296-2646

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