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Electrodeposited Pt-Ir electrodes: characterization and electrocatalytic activity for the reduction of the nitrate ion

Authors
  • Ureta-Zañartu, M. Soledad1
  • Yáñez, Claudia1
  • Reyes, Gloria1
  • Gancedo, José Ramón2
  • Marco, José F.2
  • 1 Departamento de Ciencias Químicas, Facultad de Química y Biología, USACH, Casilla 40, Santiago-33 Chile, Tel.: +5626820493; Fax: +5626812108 e-mail: [email protected], CL
  • 2 Instituto de Química Física “Rocasolano” CSIC, Serrano 119, E-28006 Madrid, Spain, ES
Type
Published Article
Journal
Journal of Solid State Electrochemistry
Publisher
Springer-Verlag
Publication Date
Apr 01, 1998
Volume
2
Issue
3
Pages
191–197
Identifiers
DOI: 10.1007/s100080050086
Source
Springer Nature
Keywords
License
Yellow

Abstract

The activity of Pt-Ir deposits on titanium for the reduction of the nitrate ion in 0.5 M perchloric acid was studied. The electrodes were characterized by SEM-EDAX, XPS and cyclic voltammetry. The activity of the electrodes for the nitrate reduction depended on the Pt-Ir ratio. Repetitive cyclic voltammograms produced an enrichment of the electrode surface with Ir and a decrease of the catalytic activity. A synergistic effect in the electrodes with low iridium content is discussed.

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