effect of glassy carbon properties on the electrochemical deposition of platinum nano-catalyst and its activity for methanol oxidation
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ID: 256774
2007
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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.
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| Authors | ;SANJA TERZIC;DUSAN TRIPKOVIC;VLADISLAVA M. JOVANOVIC;AMALIJA TRIPKOVIC;ANDRZEJ KOWAL |
| Journal | meditsinskaia radiologiia |
| Year | 2007 |
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