Academic Journals Database
Disseminating quality controlled scientific knowledge

Effect of glassy carbon properties on the electrochemical deposition of platinum nano-catalyst and its activity for methanol oxidation

ADD TO MY LIST
 
Author(s): SANJA TERZIC | DUSAN TRIPKOVIC | VLADISLAVA M. JOVANOVIC | AMALIJA TRIPKOVIC | ANDRZEJ KOWAL

Journal: Journal of the Serbian Chemical Society
ISSN 0352-5139

Volume: 72;
Issue: 2;
Start page: 165;
Date: 2007;
VIEW PDF   PDF DOWNLOAD PDF   Download PDF Original page

Keywords: glassy carbon support | platinum catalyst | electrochemical properties | methanol electrooxidation | scanning tunneling microscopy (STM)

ABSTRACT
The effects of the properties of glassy carbon on the deposition of platinum particles and the electrocatalytic activity of platinum supported on glassy carbon (GC/Pt) for methanol oxidation in alkaline and acidic solutions were studied. Platinum was potentiostatically deposited on two glassy carbon samples, thermally treated at different temperatures, which were either polished or anodicaly polarised in acid (GCOX-AC/Pt) and in alkali (GCOX-AL/Pt). Anodic polarisation of glassy carbon, either in alkaline or acidic solution, enhances the activity of both types of GC/Pt electrodes for methanol oxidation. The activity of the catalysts follows the change in the properties of the glassy carbon support upon anodic treatment. The specific activity of the GCOX-AL/Pt electrode for this reaction in alkali is increased only a few times in comparison with the activity of the GC/Pt one. On the other hand, the specific activity of the GCOX-AC/Pt electrode for methanol oxidation in acid is about one order of magnitude higher than that of the GC/Pt electrode. The role of the substrate on the properties of catalyst is discussed in detail.

Tango Jona
Tangokurs Rapperswil-Jona

     Save time & money - Smart Internet Solutions