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

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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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Authors and Affiliations

  1. Departamento de Ciencias Químicas, Facultad de Química y Biología, USACH, Casilla 40, Santiago-33 Chile, Tel.: +5626820493; Fax: +5626812108 e-mail: mureta@lauca.usach.cl, , , , , , CL

    M. Soledad Ureta-Zañartu, Claudia Yáñez & Gloria Reyes

  2. Instituto de Química Física “Rocasolano” CSIC, Serrano 119, E-28006 Madrid, Spain, , , , , , ES

    José Ramón Gancedo & José F. Marco

Authors
  1. M. Soledad Ureta-Zañartu
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  2. Claudia Yáñez
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  3. Gloria Reyes
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  4. José Ramón Gancedo
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  5. José F. Marco
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Received: 2 June 1997 / Accepted: 28 August 1997

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Ureta-Zañartu, M., Yáñez, C., Reyes, G. et al. Electrodeposited Pt-Ir electrodes: characterization and electrocatalytic activity for the reduction of the nitrate ion. J Solid State Electrochem 2, 191–197 (1998). https://doi.org/10.1007/s100080050086

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  • DOI: https://doi.org/10.1007/s100080050086

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