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

Author(s)

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

• Document type: Journal article
• Source: INTERNATIONAL JOURNAL OF ELECTROCHEMISTRY; v. 2012, p. 10-pg., 2012-01-01.

Abstract

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)

• FAPESP's process: 07/00013-4 - New materials, studies and applications of CVD diamond, diamond-like-carbon (DLC) and nanostructured carbon obtained by chemical vapor deposition
• Grantee: Evaldo Jose Corat
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 09/10661-9 - Development of low Pt content Membrane Electrode Assembly (MEA) of high efficiency using electrochemical techniques and composites membranes for intermediate temperature PEMFC .
• Grantee: Valeria Cristina Fernandes
• Support Opportunities: Scholarships in Brazil - Post-Doctoral