| Texto completo | |
| Autor(es): |
Matsushima, Jorge T.
;
Fernandes, Valeria C.
;
Couto, Andrea B.
;
Baldan, Mauricio R.
;
Ferreira, Neidenei G.
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | INTERNATIONAL JOURNAL OF ELECTROCHEMISTRY; v. 2012, p. 10-pg., 2012-01-01. |
| Resumo | |
The Cu/Pd bimetallic system electrodeposited on boron-doped diamond (BDD) films for application, as electrode material in the electrochemical reduction of nitrate was studied. The electrochemical behavior of Cu, Pd, and Cu/Pd bimetallic system was evaluated by cyclic voltammetry. From these results, the formation of the Cu/Pd composite was verified. In addition, Cu with different phases and a Cu/Pd phase in the composite were obtained. Morphological analysis by scanning electron microscopy (SEM)revealed a homogeneous distribution of Cu/Pd bimetallic particles with intermediary dimensions compared to those observed in Cu or Pd electrodeposits separately. These composites were tested as electrocatalysts for nitrate reduction in Britton-Robinson buffer solution (pH 9). Electrochemical measurements showed that composites with higher Cu content displayed the best electrocatalytic activity for nitrate reduction, and the Cu/Pd phase in the bimetallic systemserved to improve the Cu adherence on BDD electrode. (AU) | |
| Processo FAPESP: | 07/00013-4 - Novos materiais, estudos e aplicações inovadoras em diamante-CVD, diamond-like-carbon (DLC) e carbono nanoestruturado obtidos por deposição química a partir da fase vapor |
| Beneficiário: | Evaldo Jose Corat |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 05/51387-6 - Producao e caracterizacao eletroquimica de filmes micro e nanocristalinos de diamante cvd sobre substratos porosos. |
| Beneficiário: | Neidenei Gomes Ferreira |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 09/10661-9 - Desenvolvimento de conjunto membrana-eletrodo (MEA) de alta eficiência e baixo teor de Pt utilizando técnicas eletroquímicas e membranas compósitas para células PEMFC de temperatura intermediária. |
| Beneficiário: | Valeria Cristina Fernandes |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |