Utilising solution dispersed platinum nanoparticles to direct the growth of electrodeposited platinum nanostructures and its influence on the electrocatalytic oxidation of small organic molecules
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Publication Details
Author list: Lertanantawong B., Surareungchai W., O'Mullane A.P.
Publisher: Elsevier
Publication year: 2016
Journal: Journal of Electroanalytical Chemistry (1572-6657)
Volume number: 779
Start page: 99
End page: 105
Number of pages: 7
ISSN: 1572-6657
Languages: English-Great Britain (EN-GB)
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Abstract
The electrodeposition of platinum nanostructures on glassy carbon electrodes in the absence and presence of platinum nanoparticles in the electrolyte is reported. It is found that the presence of platinum nanoparticles has a significant influence of the morphology of the platinum electrodeposited onto the electrode surface. Even though the morphology of the materials is affected, the overall surface area is similar. The electrochemical behaviour of the platinum nanostructures is investigated in 1 M H2SO4 where distinct differences are observed in the exposed surface sites for platinum electrodeposited in the presence of nanoparticles. The influence of these surface sites is then studied for a variety of electrocatalytic reactions such as methanol and ethylene glycol oxidation and the hydrogen evolution reaction. In the case of organic molecule oxidation reactions, the platinum structures created using platinum nanoparticles in the electrodeposition solution exhibited earlier onset potentials and increased current densities compared to those that were electrodeposited in their absence. ฉ 2016
Keywords
Electrocatalysis, electrodeposition, Ethylene glycol oxidation, Methanol oxidation, Nanostructured Pt
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