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Electrochemical Reduction of CO2 using Supported Cu2O Catalysts

Published online by Cambridge University Press:  28 June 2013

Joel Bugayong  and
Gregory L. Griffin
Joel Bugayong
Affiliation:
Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA 70803, U.S.A.
Gregory L. Griffin
Affiliation:
Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA 70803, U.S.A.
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Abstract

We have studied the electrochemical reduction of CO2 to produce short chain hydrocarbons and alcohols using supported Cu2O electrocatalysts. The catalysts are prepared using Cu2O nanoparticles formed by chemical reduction of aqueous CuCl2 mixed with polyethylene glycol surfactant, followed by addition of NaOH and L-ascorbic acid (sodium). The nanoparticles are then added to a Nafion/ethanol solution and coated onto a carbon fiber support. When tested used for CO2 electroreduction at −1.5 V(NHE), the Cu2O particles are reduced to metallic Cu, but the hydrocarbon product distribution remains different from that reported for conventional metallic Cu electrodes. Ethylene is the major hydrocarbon produced, with a Faradaic efficiency around 25%, while the efficiency for CH4 formation is reduced to around 1%. The major alcohol product is ethanol, with a Faradaic efficiency around 6%. The relative formation rates of the individual products are discussed in terms of the relevant branch points in recent computational models for the overall reaction mechanism.

Keywords

Cuethanolelectrochemical synthesis
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1542: Symposium G – Electrochemical Interfaces for Energy Storage and Conversion—Fundamental Insights from Experiments to Computations , 2013 , mrss13-1542-g05-11
Copyright
Copyright © Materials Research Society 2013 

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