| Autor: |
D. M. dos Anjos, Françoise Hahn, Germano Tremiliosi-Filho, Kouakou Boniface Kokoh, J.-M. Léger |
| Rok vydání: |
2008 |
| Předmět: |
|
| Zdroj: |
Journal of the Brazilian Chemical Society. 19:795-802 |
| ISSN: |
0103-5053 |
| DOI: |
10.1590/s0103-50532008000400026 |
| Popis: |
Ethanol oxidation has been studied on Pt-Sn and Pt-Sn-W electrodes prepared in an arc-melting furnace. Different electrochemical techniques like cyclic voltammetry and chronoamperometry were used to evaluate the catalytic activity of these materials. The electro-oxidation process was also investigated by in situ infrared reflectance spectroscopy in order to determine adsorbed intermediates and reaction products. Experimental results indicated that Pt-Sn and Pt-Sn-W alloys are able to oxidize ethanol mainly to acetaldehyde and acetic acid. Adsorbed CO was also detected, demonstrating the viability of splitting the C-C bond in the ethanol molecule during the oxidation process. The adsorbed CO was further oxidized to CO2.This reaction product was clearly detected by SNIFTIRS. Pt-Sn-W catalyst showed a better electrochemical performance than Pt-Sn that, in it turn, is better than Pt-alone. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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