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Copper-Tin Alloys for the Electrocatalytic Reduction of CO2 in an Imidazolium-Based Non-Aqueous Electrolyte

1
Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
2
Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
*
Authors to whom correspondence should be addressed.
Knoxville Catholic High School, 9245 Fox Lonas Rd NW, Knoxville, TN 37923, USA.
Energies 2019, 12(16), 3132; https://doi.org/10.3390/en12163132
Received: 12 June 2019 / Revised: 30 July 2019 / Accepted: 7 August 2019 / Published: 15 August 2019
(This article belongs to the Special Issue Carbon Capture, Storage and Utilization)
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Abstract

The ability to synthesize value-added chemicals directly from CO2 will be an important technological advancement for future generations. Using solar energy to drive thermodynamically uphill electrochemical reactions allows for near carbon-neutral processes that can convert CO2 into energy-rich carbon-based fuels. Here, we report on the use of inexpensive CuSn alloys to convert CO2 into CO in an acetonitrile/imidazolium-based electrolyte. Synergistic interactions between the CuSn catalyst and the imidazolium cation enables the electrocatalytic conversion of CO2 into CO at −1.65 V versus the standard calomel electrode (SCE). This catalyst system is characterized by overpotentials for CO2 reduction that are similar to more expensive Au- and Ag-based catalysts, and also shows that the efficacy of the CO2 reduction reaction can be tuned by varying the CuSn ratio. View Full-Text
Keywords: electrocatalysis; electrodeposition; CO2 electroreduction; non-aqueous electrolytes electrocatalysis; electrodeposition; CO2 electroreduction; non-aqueous electrolytes
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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MDPI and ACS Style

Sacci, R.; Velardo, S.; Xiong, L.; Lutterman, D.; Rosenthal, J. Copper-Tin Alloys for the Electrocatalytic Reduction of CO2 in an Imidazolium-Based Non-Aqueous Electrolyte. Energies 2019, 12, 3132.

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