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Journal of Solid State Electrochemistry

, Volume 22, Issue 9, pp 2821–2828 | Cite as

Electrochemical behavior of CoSb3 in sulfuric and oxalic acids over the potential range 0 to 40 V

  • Delphine Veys-Renaux
  • Richard Drevet
  • Carine Petitjean
  • Lionel Aranda
  • Nicolas David
  • Patrice Berthod
Original Paper
  • 65 Downloads

Abstract

The electrochemical behavior of pure Co, pure Sb, and CoSb3 has been investigated over a large anodic potential range (0 to 40 V) in two acids, i.e., oxalic acid or sulfuric acid at different concentrations (0.01 to 1 M). Potentiodynamic polarizations performed on CoSb3 plates reveal the possible formation of a passive layer between 1 and 3 V (vs SCE), on a passivation plateau. The oxidation of CoSb3 at 2 V in sulfuric and oxalic acids results in the growth of an anodic conversion layer. This coating is mainly made of a porous layer of amorphous antimony oxides due to dealloying of CoSb3. In the specific case of oxalic acid, rods of crystallized oxalates are tangled between the oxide sheets.

Keywords

Intermetallics Thin films Anodization Dealloying SEM 

Notes

Acknowledgements

The French National Research Agency (ANR) is gratefully acknowledged for financial support of the post-doctoral position of Richard Drevet in the project Nanoskut (ANR-12-PRGE-0008-01).

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Delphine Veys-Renaux
    • 1
  • Richard Drevet
    • 1
  • Carine Petitjean
    • 1
  • Lionel Aranda
    • 1
  • Nicolas David
    • 1
  • Patrice Berthod
    • 1
  1. 1.Institut Jean LamourUMR 7198 CNRS-Université de Lorraine, Campus Artem, allée André GuinierNancy cedexFrance

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