Author, as appears in the article.: Poblet, J. M: ; Lang, Z. ; Aparicio-Anglès, X.; Weinstock, I.; Clotet, A.
Department: Química Física i Inorgànica
URV's Author/s: POBLET RIUS, JOSEP MARIA; Lang, Z. ; Aparicio-Anglès, X.; Weinstock, I.; Clotet, A.
Keywords: polyoxometalates DFT
Abstract: Understanding the interaction between charged species and surfaces is one of the most challenging topics in chemistry, given its wide involvement in several fields such as electrocatalysis, stabilization of metal nanoparticles, preparation of devices, etc. In general, these systems are particularly complex to model because of the elevated number of factors that must be taken into account. Here, we report a robust strategy based on density functional theory for studying these interactions, which has been applied to the highly charged lacunary [PW11O39]7– (PW11) adsorbed on gold and silver surfaces. In this context, we find that, unlike the modeling of polyoxoanions in solution, the incorporation of counterions in the computational models is crucial for accurately reproducing the properties of the system, even if an implicit solvent is used. Most interestingly, we find that the PW11 cluster does not preferentially adsorb to the gold surface via its more nucleophilic monodefect face but, rather, through less negatively charged terminal oxygen ligands, with an orientation similar to that found for the nondefective Keggin anion [SiW12O40]4–, induced by the strong anion–cation interactions from the same and neighboring units. This counterintuitive result is important for ongoing efforts to understand and utilize the properties of polyoxometalate monolayers on gold and other reactive metal surfaces.
Research group: Química Quàntica
Thematic Areas: Química Química Chemistry
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 0020-1669
Author identifier: 0000-0002-4533-0623; ; ; ;
Record's date: 2018-03-05
Last page: 3969
Journal volume: 56
Papper version: info:eu-repo/semantics/submittedVersion
Funding program: plan; Excelencia; CTQ2014-52774-P altres; Grupos Consolidados; 2014SGR199 altres; ICREA Academia
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Entity: Universitat Rovira i Virgili
Journal publication year: 2017
First page: 3961
Publication Type: Article Artículo Article
Repositori URV