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Journal of Materials Science

, Volume 42, Issue 22, pp 9293–9299 | Cite as

Effect of the preparation methodology on some physical and electrochemical properties of Ti/Ir x Sn(1−x)O2 materials

  • Josimar Ribeiro
  • Paula D. P. Alves
  • Adalgisa R. de Andrade
Article

Abstract

The aim of this work was to prepare electrodes based on the Ti/Ir x Sn(1−x)O2 composition, as well as test their stability toward the chlorine evolution reaction (ClER). To this end, two different preparation routes were investigated: thermal decomposition of polymeric precursors (DPP) and standard decomposition using isopropanol as solvent (SD/ISO). A systematic investigation of the structural, morphological, and electrochemical properties of the anodes with a nominal composition of Ti/Ir x Sn(1−x)O2, prepared through the two different methodologies, was carried out. The oxide layer surface morphology, microstructure, and composition were investigated by Energy Dispersive X-ray Spectroscopy (EDS) and Scanning Electron Microscopy (SEM) techniques prior to and after accelerated life tests. EDS analyses following total deactivation of the electrode gave evidence of a relatively large content of Ir in the coating. XRD results showed there was formation of solid solution between IrO2 and SnO2, and the degree of miscibility of these solutions is controlled by the preparation method. Thus, the DPP method led to phase separation and large interval of immiscibility between the oxides analyzed. On the other hand, the SD/ISO method led to formation of solid solution for all the investigated compositions. The SD/ISO method produced materials rich in Ir, so the electrode lifetime was much longer if compared with the DPP counterparts.

Keywords

SnO2 Iridium IrO2 Accelerate Life Test Scanning Electron Microcopy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

A.R. de Andrade acknowledges the financial support to this work by FAPESP foundation. The scholarships granted by CAPES (P.D.P. Alves) and FAPESP (J. Ribeiro #02/06465–0) are greatly acknowledged.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Josimar Ribeiro
    • 1
  • Paula D. P. Alves
    • 1
  • Adalgisa R. de Andrade
    • 1
  1. 1.Departamento de Química da Faculdade de Filosofia Ciências e Letras de Ribeirão PretoUniversidade de São PauloRibeirao PretoBrazil

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