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Pulse Plating of Copper onto Gas Diffusion Layers for the Electroreduction of Carbon Dioxide

Published online by Cambridge University Press:  28 December 2017

Sujat Sen
Affiliation:
Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
McLain Leonard
Affiliation:
Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
Rajeswaran Radhakrishnan
Affiliation:
Faraday Technology, Inc., Englewood, OH, 45315, USA
Stephen Snyder
Affiliation:
Faraday Technology, Inc., Englewood, OH, 45315, USA
Brian Skinn
Affiliation:
Faraday Technology, Inc., Englewood, OH, 45315, USA
Dan Wang
Affiliation:
Faraday Technology, Inc., Englewood, OH, 45315, USA
Timothy Hall
Affiliation:
Faraday Technology, Inc., Englewood, OH, 45315, USA
E. Jennings Taylor
Affiliation:
Faraday Technology, Inc., Englewood, OH, 45315, USA
Fikile R. Brushett*
Affiliation:
Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
*

Abstract

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This paper discusses a pulse electroplating method for preparing copper (Cu)-coated gas diffusion electrodes (GDEs) for the electrochemical conversion of carbon dioxide (CO2) to hydrocarbons such as ethylene. Ionomer coating and air-plasma surface pre-treatments were explored as means of hydrophilizing the carbon surface to enable adhesion of electrodeposited material. The pulsed-current electrodeposition method used successfully generated copper and copper oxide micro- and nano-particles on the prepared surfaces. Copper(I) species identified on the ionomer-treated GDEs are presumed to be highly active for the selective generation of ethylene as compared to other gaseous byproducts of CO2 reduction. Conversely, copper catalysts deposited onto plasma-treated GDEs were found to have poor activity for hydrocarbon production, likely due to substantial metallic character. Of note, plasma treatment of an ionomer-treated GDE after copper plating yielded further improvements in catalytic activity and durability towards ethylene production.

Type
Articles
Copyright
Copyright © Materials Research Society 2017 

References

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