Reduction of Au3+ ions by activated surface atoms of platinum

O'Mullane, Anthony P. & Bhargava, Suresh K. (2011) Reduction of Au3+ ions by activated surface atoms of platinum. Electrochemistry Communications, 13(8), pp. 852-855.

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Abstract

In this work it is demonstrated that Pt electrodes can be activated by cathodic polarisation in the hydrogen evolution region which makes it prone to oxidation at potentials below that of bulk oxide formation. When an activated Pt electrode is placed in an aqueous HAuCl4 solution the electroless deposition of Au onto the surface of the electrode is observed and confirmed by cyclic voltammetry and XPS measurements. It is demonstrated that the oxidation of active Pt surface atoms provides the driving force for the spontaneous reduction of Au3+ ions into metallic Au to generate a Pt/Au surface which is highly active for the electro-oxidation of ethanol.

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10 citations in Scopus
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11 citations in Web of Science®

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ID Code: 64296
Item Type: Journal Article
Refereed: Yes
DOI: 10.1016/j.elecom.2011.05.020
ISSN: 1388-2481
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 12 Nov 2013 23:24
Last Modified: 19 Nov 2013 00:54

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