Investigation of a Cu/Pd Bimetallic System Electrodeposited on Boron-Doped Diamond Films for Application in Electrocatalytic Reduction of Nitrate

Autor(es)

Matsushima, Jorge T. ; Fernandes, Valeria C. ; Couto, Andrea B. ; Baldan, Mauricio R. ; Ferreira, Neidenei G.

• 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