The adsorption of Cu on the CeO2(110) surface

Chutia, Arunabhiram, Gibson, Emma K., Farrow, Matthew R., Wells, Peter P., Scanlon, David O., Dimitratos, Nikolaos ORCID: https://orcid.org/0000-0002-6620-4335, Willock, David ORCID: https://orcid.org/0000-0002-8893-1090 and Catlow, Charles Richard A. ORCID: https://orcid.org/0000-0002-1341-1541 2017. The adsorption of Cu on the CeO2(110) surface. Physical Chemistry Chemical Physics 19 (40) , pp. 27191-27203. 10.1039/C7CP04144F

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Abstract

We report a detailed density functional theory (DFT) study in conjunction with extended X-ray absorption fine structure (EXAFS) experiments on the geometrical and local electronic properties of Cu adatoms and Cu(II) ions in presence of water molecules and of CuO nanoclusters on the CeO2(110) surface. Our study of (CuO)n(=1,2&4) clusters on CeO2(110) shows that based on the Cu–O environment, the geometrical properties of these clusters may vary and their presence may lead to relatively high localization of charge on the exposed surfaces. We find that in the presence of an optimum concentration of water molecules, Cu has a square pyramidal geometry, which agrees well with our experimental findings; we also find that Cu(II) facilitates water adsorption on the CeO2(110) surface. We further show that a critical concentration of water molecules is required for the hydrolysis of water on Cu(OH)2/CeO2(110) and on pristine CeO2(110) surfaces.

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Advanced Research Computing @ Cardiff (ARCCA) Cardiff Catalysis Institute (CCI) Chemistry
Publisher:	Royal Society of Chemistry
ISSN:	1463-9076
Funders:	Engineering and Physical Sciences Research Council
Date of First Compliant Deposit:	1 November 2017
Date of Acceptance:	23 August 2017
Last Modified:	04 May 2023 20:24
URI:	https://orca.cardiff.ac.uk/id/eprint/106116

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