Direct electrochemical formation of alloyed AuPt nanostructured electrocatalysts for the oxidation of formic acid

Balkis, Ali & O'Mullane, Anthony P. (2014) Direct electrochemical formation of alloyed AuPt nanostructured electrocatalysts for the oxidation of formic acid. Materials Chemistry and Physics, 143(2), pp. 747-753.

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The formation of highly anisotropic AuPt alloys has been achieved via a simple electrochemical approach without the need for organic surfactants to direct the growth process. The surface and bulk properties of these materials were characterised by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX) and electrochemically by cyclic voltammetry to confirm alloy formation. It was found that AuPt materials are highly active for both the model hydrogen evolution reaction and the fuel cell relevant formic acid oxidation reaction. In particular for the latter case the preferred dehydrogenation pathway was observed at AuPt compared to nanostructured Pt prepared under identical electrochemical conditions which demonstrated the less preferred dehydration pathway. The enhanced performance is attributed to both the ensemble effect which facilitates CO(ads) removal from the surface as well as the highly anisotropic nanostructure of AuPt.

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ID Code: 64350
Item Type: Journal Article
Refereed: Yes
Additional Information: Paper published prior to QUT
Keywords: Alloys; Nanostructures; Electrochemical techniques; Electrochemical properties
DOI: 10.1016/j.matchemphys.2013.10.009
ISSN: 0254-0584
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 18 Nov 2013 22:31
Last Modified: 16 Jan 2016 21:56

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