Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 514, Issue 1-2, Pages 51-55Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0022-0728(01)00624-6
Keywords
electrochemical CO2; reduction; sputtering; Au electrode
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Electrochemical CO2 reduction was studied in KCl and KHCO3 using a Au electrode prepared by sputtering. We investigated the influence of the sputtering parameters (rf power, Ar pressure during deposition, and the distance between substrate and target) and thickness on the reduction potential and products, CO and H-2, In KCl, the reduction potential, i.e. the overvoltage, was influenced by the Ar pressure, which affects the Au surface geometrical structure/surface area, while in KHCO3, the potential remained almost constant, probably due to the neutralizing capacity of KHCO3. The other sputtering parameters did not change the CO2 reduction behavior appreciably. (C) 2001 Elsevier Science B.V. All rights reserved.
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