The ethanol electrooxidation at Pt layers deposited on polycrystalline Au
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
|---|---|
| Data(s) |
18/09/2013
18/09/2013
2012
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| Resumo |
The ethanol electro-oxidation reaction was evaluated using a polycrystalline Au substrate modified with two different amounts of Pt using the galvanic exchange methodology. FTIR results suggest that Pt deposits have a greater ability to break the C-C bond present in the ethanol molecule. However, under potentiostatic conditions both modified Au surfaces undergo faster deactivation in comparison with polycrystalline platinum as indicated by the chronoamperometric results. XPS results indicate the presence of two phases depending on the Pt content. These are: (i) Pt-Au alloy and (ii) segregated Pt. The structural and electronic properties of these phases were related to the differences observed in the catalytic activity. Conselho Nacional de Pesquisa (CNPq) [Proc. 142507/2007-5] Conselho Nacional de Pesquisa (CNPq) Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) |
| Identificador |
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, CAMBRIDGE, v. 14, n. 2, pp. 599-606, MAY, 2012 1463-9076 http://www.producao.usp.br/handle/BDPI/33443 10.1039/c1cp22390a |
| Idioma(s) |
eng |
| Publicador |
ROYAL SOC CHEMISTRY CAMBRIDGE |
| Relação |
PHYSICAL CHEMISTRY CHEMICAL PHYSICS |
| Direitos |
openAccess Copyright ROYAL SOC CHEMISTRY |
| Palavras-Chave | #PLATINUM-GOLD ALLOYS #OXYGEN REDUCTION REACTION #SMALL ORGANIC-MOLECULES #TIME FTIR SPECTROSCOPY #SURFACE-COMPOSITION #METHANOL OXIDATION #FUEL-CELLS #NANOPARTICLES #CATALYSTS #ACID #CHEMISTRY, PHYSICAL #PHYSICS, ATOMIC, MOLECULAR & CHEMICAL |
| Tipo |
article original article publishedVersion |
