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Structural analyses of RuO2–TiO2/Ti and IrO2–RuO2–TiO2/Ti anodes used in industrial chlor-alkali membrane processes

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Abstract

The morphology and composition of RuO2–TiO2/Ti and IrO2–RuO2–TiO2/Ti anodes, which have been used for the production of chlorine for more than 10 years, were analyzed by various methods; such as high-resolution scanning electron microscopy, high-resolution Auger electron spectroscopy, electron probe X-ray emission microanalysis and X-ray diffraction analysis. Drastic changes in the surface morphology, including partial exfoliation of a small amount of the oxide layer and a reduction in the content of ruthenium species through dissolution, were observed for the RuO2–TiO2/Ti anode. For the IrO2–RuO2–TiO2/Ti anode, on the other hand, there were moderate changes in the surface morphology and moderate dissolution of iridium and ruthenium species.

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Acknowledgments

The authors are grateful to Shinko Electronic Industrial Co Ltd for obtaining the HR-AES spectra.

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Authors and Affiliations

  1. Department of Materials and Chemical Engineering, Shinshu University, 3-15-1 Tokida, Ueda, Nagano, 386-8567, Japan

    Yoshio Takasu & Wataru Sugimoto

  2. Permelec Electrode Ltd, 2023-15 Endo, Fujisawa, Kanagawa, 252-0816, Japan

    Yoshinori Nishiki & Shuji Nakamatsu

Authors
  1. Yoshio Takasu
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  2. Wataru Sugimoto
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  3. Yoshinori Nishiki
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  4. Shuji Nakamatsu
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Correspondence to Yoshio Takasu.

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Takasu, Y., Sugimoto, W., Nishiki, Y. et al. Structural analyses of RuO2–TiO2/Ti and IrO2–RuO2–TiO2/Ti anodes used in industrial chlor-alkali membrane processes. J Appl Electrochem 40, 1789–1795 (2010). https://doi.org/10.1007/s10800-010-0137-3

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  • DOI: https://doi.org/10.1007/s10800-010-0137-3

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