Characterization of reaction of green rust with foreign ions using X-ray absorption fine structure

Shigeru Suzuki, Kozo Shinoda, Masugu Sato, Shinji Fujimoto, Masato Yamashita, Hiroyuki Konishi, Takashi Doi, Takayuki Kamimura, Tamotsu Hashimoto, Katsuya Inoue

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Measurements of X-ray absorption fine structure (XAFS), that is X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS), were performed for characterizing the reactions of hydrosulphate green rust (GR) with copper or nickel sulphate ions. Fe K edge XANES spectra showed that a part of Fe (II) in GR2 was oxidized by the addition of copper sulphate ions, while Fe (II) in GR was not oxidized by the addition of nickel sulphate ions. Cu K edge and Ni K edge XANES spectra showed that copper sulphate ions were reduced to zero charge copper in the GR suspension, whereas nickel sulphate ions were not reduced. Radial structural functions for iron obtained from Fe K edge EXAFS spectra indicated that the structure of GR consisted of corner sharing of structural units formed by FeO6 octahedra. Radial structural functions for copper and nickel also indicated that copper sulphate ions were transformed to metallic copper with the face-centered cubic structure in the GR suspension, whereas the local structure of nickel sulphate ions were unchanged. XANES and EXAFS data of GR oxidized by a H 2O2 solution were also investigated for comparison.

Original languageEnglish
Pages (from-to)353-357
Number of pages5
JournalZairyo to Kankyo/ Corrosion Engineering
Volume57
Issue number8
DOIs
Publication statusPublished - 2008 Aug

Keywords

  • Atmospheric corrosion
  • Copper
  • EXAFS
  • Green rust
  • Iron
  • Nickel
  • XANES

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrochemistry
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Characterization of reaction of green rust with foreign ions using X-ray absorption fine structure'. Together they form a unique fingerprint.

  • Cite this

    Suzuki, S., Shinoda, K., Sato, M., Fujimoto, S., Yamashita, M., Konishi, H., Doi, T., Kamimura, T., Hashimoto, T., & Inoue, K. (2008). Characterization of reaction of green rust with foreign ions using X-ray absorption fine structure. Zairyo to Kankyo/ Corrosion Engineering, 57(8), 353-357. https://doi.org/10.3323/jcorr.57.353