Studies of the electrodeposition of platinum metal from a hexachloroplatinic acid bath
Studies of the electrodeposition of platinum metal from a hexachloroplatinic acid bath
The mechanism of platinum deposition onto carbon from a bath containing H2PtCl6 in 0.1 M HCl is discussed. Although voltammograms show multiple cathodic waves, it is shown that they all result from the reduction of Pt(IV) to Pt(0) and there is no evidence for Pt(II) as a stable intermediate at any potential; the multiple waves arise because the hexachloroplatinic acid exists in solution as a mixture of kinetically inert Cl?/H2O complexes. The nucleation of the Pt centres on carbon is a very slow process even with a large overpotential and this leads to surfaces with well dispersed hemispherical nuclei. Moreover, each Pt centre appears to grow only to a limiting size before growth ceases.
chloroplatinic acid, pt electrodeposition
327-332
Yasin, Hartini M.
f0874b1c-e8d9-4fe8-9bb3-31d4b1343acd
Denuault, Guy
5c76e69f-e04e-4be5-83c5-e729887ffd4e
Pletcher, Derek
f22ebe69-b859-4a89-80b0-9e190e6f8f30
15 August 2009
Yasin, Hartini M.
f0874b1c-e8d9-4fe8-9bb3-31d4b1343acd
Denuault, Guy
5c76e69f-e04e-4be5-83c5-e729887ffd4e
Pletcher, Derek
f22ebe69-b859-4a89-80b0-9e190e6f8f30
Yasin, Hartini M., Denuault, Guy and Pletcher, Derek
(2009)
Studies of the electrodeposition of platinum metal from a hexachloroplatinic acid bath.
Journal of Electroanalytical Chemistry, 633 (2), .
(doi:10.1016/j.jelechem.2009.06.020).
Abstract
The mechanism of platinum deposition onto carbon from a bath containing H2PtCl6 in 0.1 M HCl is discussed. Although voltammograms show multiple cathodic waves, it is shown that they all result from the reduction of Pt(IV) to Pt(0) and there is no evidence for Pt(II) as a stable intermediate at any potential; the multiple waves arise because the hexachloroplatinic acid exists in solution as a mixture of kinetically inert Cl?/H2O complexes. The nucleation of the Pt centres on carbon is a very slow process even with a large overpotential and this leads to surfaces with well dispersed hemispherical nuclei. Moreover, each Pt centre appears to grow only to a limiting size before growth ceases.
This record has no associated files available for download.
More information
Published date: 15 August 2009
Keywords:
chloroplatinic acid, pt electrodeposition
Identifiers
Local EPrints ID: 158675
URI: http://eprints.soton.ac.uk/id/eprint/158675
ISSN: 1572-6657
PURE UUID: c3e641ea-184d-4121-b7ca-645ebca81d38
Catalogue record
Date deposited: 24 Jun 2010 08:24
Last modified: 14 Mar 2024 02:36
Export record
Altmetrics
Contributors
Author:
Hartini M. Yasin
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
