Potential Dependent Structure and Stability of Cu(111) in Neutral Phosphate Electrolyte

Grunder, Y ORCID: 0000-0002-5295-0927, Lucas, Christopher ORCID: 0000-0001-5743-3868, Beane, JW, Rodriguez, Paramaconi and Kolodziej, Adam
(2019) Potential Dependent Structure and Stability of Cu(111) in Neutral Phosphate Electrolyte. Surfaces, 2 (1). pp. 145-158.

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<jats:p>Copper and copper oxide electrode surfaces are suitable for the electrochemical reduction of CO2 and produce a range of products, with the product selectivity being strongly influenced by the surface structure of the copper electrode. In this paper, we present in-situ surface X-ray diffraction studies on Cu(111) electrodes in neutral phosphate buffered electrolyte solution. The underlying mechanism of the phosphate adsorption and deprotonation of the (di)-hydrogen phosphate is accompanied by a roughening of the copper surface. A change in morphology of the copper surface induced by a roughening process caused by the formation of a mixed copper–oxygen layer could also be observed. The stability of the Cu(111) surface and the change of morphology upon potential cycling strongly depends on the preparation method and history of the electrode. The presence of copper islands on the surface of the Cu(111) electrode leads to irreversible changes in surface morphology via a 3D Cu growth mechanism.</jats:p>

Item Type: Article
Uncontrolled Keywords: Cu(111), electrochemical interface, in-situ X-ray diffraction
Depositing User: Symplectic Admin
Date Deposited: 28 Feb 2019 09:42
Last Modified: 14 Mar 2024 21:39
DOI: 10.3390/surfaces2010012
Open Access URL: https://www.mdpi.com/2571-9637/2/1/12
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3033539