Volume 230, 2021

Hydrophobic thiol coatings to facilitate a triphasic interface for carbon dioxide reduction to ethylene at gas diffusion electrodes

Abstract

The electrochemical reduction of CO2 continues to see significant interest as a viable means of both producing important chemical materials and lowering carbon emissions. The primary challenge to making this process economically viable is the design of catalyst, electrode and reactor components that can selectively produce just one of the many possible CO2 reduction products. In this work, we report the use of hydrophobic 1-octadecanethiol coatings at copper coated gas diffusion electrodes to enhance the production of ethylene. This thiol coating gives a substantial increase in the production of ethylene at low current densities as well as a change in the rate determining step, as indicated by the substantial reduction in the Tafel slope. The observed changes to the CO2 reduction reaction indicate that the thiol layer provides a triphasic interface within the gas diffusion electrode catalyst layer.

Graphical abstract: Hydrophobic thiol coatings to facilitate a triphasic interface for carbon dioxide reduction to ethylene at gas diffusion electrodes

Associated articles

Article information

Article type
Paper
Submitted
11 Kax 2020
Accepted
03 Nah 2021
First published
04 Nah 2021
This article is Open Access
Creative Commons BY license

Faraday Discuss., 2021,230, 375-387

Hydrophobic thiol coatings to facilitate a triphasic interface for carbon dioxide reduction to ethylene at gas diffusion electrodes

S. C. Perry, S. Mavrikis, M. Wegener, P. Nazarovs, L. Wang and C. Ponce de León, Faraday Discuss., 2021, 230, 375 DOI: 10.1039/D0FD00133C

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