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MD simulation of water at imperfect platinum surfaces: Part 2 electrostatics

Record type: Article

Three-dimensional electrostatic potential distributions of a series of platinum\water interfaces were calculated from trajectories of molecular dynamics simulations. The electrostatic potential within the adsorbed layer shows periodic features reflecting the structure of water. It is negative at a point vacancy, due to the water molecule that occupies it. In Vacant adsorption sites the potential is close to zero, thus ion adsorption can take place there. The potential around platinum atoms at the step edge varies spatially between highly negative and positive values, therefore ion adsorption may not be possible there. However, the potential is generally close to zero near platinum atoms under the step edge, thus these atoms are open for adsorption. The corner platinum atoms of a monoatomic rectangular terrace are surrounded with highly negative and positive potentials along the steps, but they can be reached from the (011) direction because the potential is only slightly positive there. In a kink site the electrostatic potential is close to zero and the kinks are usually open towards the bulk, thus they can serve as starting points for adsorption processes or electrochemical reactions. (C) 1997 Elsevier Science S.A.

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Citation

Nagy, Gabor and Denuault, Guy (1997) MD simulation of water at imperfect platinum surfaces: Part 2 electrostatics Journal of Electroanalytical Chemistry, 433, (1-2), pp. 161-166. (doi:10.1016/S0022-0728(97)00219-2).

More information

Published date: 15 August 1997
Additional Information: YJ743
Keywords: molecular-dynamics, electrolyte, interface, walls

Identifiers

Local EPrints ID: 179253
URI: http://eprints.soton.ac.uk/id/eprint/179253
ISSN: 1572-6657
PURE UUID: 13fac5ae-85a7-46e3-9c5c-87b2a3fce5e9
ORCID for Guy Denuault: ORCID iD orcid.org/0000-0002-8630-9492

Catalogue record

Date deposited: 04 Apr 2011 08:25
Last modified: 18 Jul 2017 12:03

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Contributors

Author: Gabor Nagy
Author: Guy Denuault ORCID iD

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