The University of Southampton
University of Southampton Institutional Repository

Thermodynamic studies of bromide adsorption at the Pt(111) electrode surface perchloric acid solutions: Comparison with other anions

Thermodynamic studies of bromide adsorption at the Pt(111) electrode surface perchloric acid solutions: Comparison with other anions
Thermodynamic studies of bromide adsorption at the Pt(111) electrode surface perchloric acid solutions: Comparison with other anions
The thermodynamics of the so-called perfectly polarizable electrode was employed to analyze the voltammograms of a Pt(1 1 1) electrode in KBr solutions with an excess of a supporting electrolyte (0.1 M HClO4 and 0.1 M KClO4 + 10?3 M HClO4 + xM KBr where x varied between 5 × 10?4 and 1 × 10?2). The surface Gibbs excess, the Gibbs energy of adsorption and the charge number at a constant electrode potential and a constant chemical potential have been determined. The effect of pH on the magnitude of these parameters has been evaluated. The thermodynamic parameters for bromide have been compared to the parameters determined from previous thermodynamic studies of (bi)sulfate, chloride and OH adsorption at the Pt(1 1 1) electrode surface. As expected, bromide adsorption is stronger than for the other anions and halide adsorption seems to be limited by close packing of the adlayer. The calculated charge number values suggest that Br adsorption involves a full charge transfer, as in the case of chloride
1572-6657
149-158
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37
Climent, Victor
c3ecab58-edb5-4055-8fa0-c0aef0fc60a4
Herrero, Enrique
96568627-6e11-4e5a-9021-e9dcc45b80c2
Feliu, Juan
14aa5d27-621c-4999-870d-4856abaf5996
Lipkowski, Jacek
d4e2022d-80e3-408c-b4ca-e2c1775b91c0
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37
Climent, Victor
c3ecab58-edb5-4055-8fa0-c0aef0fc60a4
Herrero, Enrique
96568627-6e11-4e5a-9021-e9dcc45b80c2
Feliu, Juan
14aa5d27-621c-4999-870d-4856abaf5996
Lipkowski, Jacek
d4e2022d-80e3-408c-b4ca-e2c1775b91c0

Garcia-Araez, Nuria, Climent, Victor, Herrero, Enrique, Feliu, Juan and Lipkowski, Jacek (2006) Thermodynamic studies of bromide adsorption at the Pt(111) electrode surface perchloric acid solutions: Comparison with other anions. Journal of Electroanalytical Chemistry, 591 (2), 149-158. (doi:10.1016/j.jelechem.2006.04.008).

Record type: Article

Abstract

The thermodynamics of the so-called perfectly polarizable electrode was employed to analyze the voltammograms of a Pt(1 1 1) electrode in KBr solutions with an excess of a supporting electrolyte (0.1 M HClO4 and 0.1 M KClO4 + 10?3 M HClO4 + xM KBr where x varied between 5 × 10?4 and 1 × 10?2). The surface Gibbs excess, the Gibbs energy of adsorption and the charge number at a constant electrode potential and a constant chemical potential have been determined. The effect of pH on the magnitude of these parameters has been evaluated. The thermodynamic parameters for bromide have been compared to the parameters determined from previous thermodynamic studies of (bi)sulfate, chloride and OH adsorption at the Pt(1 1 1) electrode surface. As expected, bromide adsorption is stronger than for the other anions and halide adsorption seems to be limited by close packing of the adlayer. The calculated charge number values suggest that Br adsorption involves a full charge transfer, as in the case of chloride

Full text not available from this repository.

More information

Published date: 15 June 2006
Organisations: Chemistry

Identifiers

Local EPrints ID: 345962
URI: http://eprints.soton.ac.uk/id/eprint/345962
ISSN: 1572-6657
PURE UUID: 7b1ac9da-b095-4085-95a8-e0a410b3d4e3
ORCID for Nuria Garcia-Araez: ORCID iD orcid.org/0000-0001-9095-2379

Catalogue record

Date deposited: 06 Dec 2012 15:32
Last modified: 03 Dec 2019 01:37

Export record

Altmetrics

Contributors

Author: Victor Climent
Author: Enrique Herrero
Author: Juan Feliu
Author: Jacek Lipkowski

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×