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Influence of alkali cations on the infrared spectra of adsorbed (bi)sulphate on Pt(1 1 1) electrodes

Influence of alkali cations on the infrared spectra of adsorbed (bi)sulphate on Pt(1 1 1) electrodes
Influence of alkali cations on the infrared spectra of adsorbed (bi)sulphate on Pt(1 1 1) electrodes
The role of alkali cations potassium and caesium on the structure of the interfacial region between a Pt(1 1 1) electrode and a sulphuric acid solution is investigated by cyclic voltammetry and infrared spectroscopy techniques. A strong influence of the nature of the cation on the voltammetric profile is observed at potentials higher than the main (bi)sulphate adsorption step. Although the infrared spectra show the same adsorbate bands, regardless of the cation, a different dependence between the peak frequency and the electrode potential is observed depending on the nature of the cation, with a significantly smaller slope d?/dE measured in the solutions containing potassium and caesium. This observation can be explained in terms of the Stark effect as a consequence of the decrease of the electric field in the interphase due to the increase in the size of the cation
1388-2481
1577-1582
Climent, Victor
c3ecab58-edb5-4055-8fa0-c0aef0fc60a4
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37
Feliu, Juan M.
f2a5301a-2886-4f27-b614-99a74a0a9a28
Climent, Victor
c3ecab58-edb5-4055-8fa0-c0aef0fc60a4
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37
Feliu, Juan M.
f2a5301a-2886-4f27-b614-99a74a0a9a28

Climent, Victor, Garcia-Araez, Nuria and Feliu, Juan M. (2006) Influence of alkali cations on the infrared spectra of adsorbed (bi)sulphate on Pt(1 1 1) electrodes. Electrochemistry Communications, 8 (10), 1577-1582. (doi:10.1016/j.elecom.2006.07.027).

Record type: Article

Abstract

The role of alkali cations potassium and caesium on the structure of the interfacial region between a Pt(1 1 1) electrode and a sulphuric acid solution is investigated by cyclic voltammetry and infrared spectroscopy techniques. A strong influence of the nature of the cation on the voltammetric profile is observed at potentials higher than the main (bi)sulphate adsorption step. Although the infrared spectra show the same adsorbate bands, regardless of the cation, a different dependence between the peak frequency and the electrode potential is observed depending on the nature of the cation, with a significantly smaller slope d?/dE measured in the solutions containing potassium and caesium. This observation can be explained in terms of the Stark effect as a consequence of the decrease of the electric field in the interphase due to the increase in the size of the cation

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More information

Accepted/In Press date: 17 July 2006
e-pub ahead of print date: 22 August 2006
Published date: October 2006
Organisations: Chemistry

Identifiers

Local EPrints ID: 345961
URI: https://eprints.soton.ac.uk/id/eprint/345961
ISSN: 1388-2481
PURE UUID: 2dd5d869-ffa6-408e-9b0f-d99fe5f5135d
ORCID for Nuria Garcia-Araez: ORCID iD orcid.org/0000-0001-9095-2379

Catalogue record

Date deposited: 06 Dec 2012 15:26
Last modified: 14 Jul 2018 00:30

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