Electrochromic Characteristics of a Nickel Borate Thin Film Investigated by In Situ XAFS and UV/vis Spectroscopy

• YOSHIDA Masaaki

  Department of Chemistry, Keio University

• IIDA Tsuyoshi

  Department of Chemistry, Keio University

• MINEO Takehiro

  Department of Chemistry, Keio University

• YOMOGIDA Takumi

  Department of Chemistry, Keio University

• NITTA Kiyofumi

  Japan Synchrotron Radiation Research Institute

• KATO Kazuo

  Japan Synchrotron Radiation Research Institute

• NITANI Hiroaki

  Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization

• ABE Hitoshi

  Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization

• URUGA Tomoya

  Japan Synchrotron Radiation Research Institute

• KONDOH Hiroshi

  Department of Chemistry, Keio University

Abstract

The electrochromic transition of a nickel borate thin film between colorless and brown was examined by means of in situ XAFS and UV/vis spectroscopy. The XAFS spectra showed that the average valence state of the nickel species in the film changed from +2.1 to +3.8 following the application of an electrode potential. Additionally, a broad peak at 700 nm was observed during in situ UV/vis absorption measurements on the application of a positive potential. These results suggest that the nickel borate film reversibly forms a NiOOH structure with a domain size of several nanometers during the electrochromic reaction.

Journal

• Electrochemistry

  Electrochemistry 82 (5), 355-358, 2014

  The Electrochemical Society of Japan

Keywords

• Electrochromism
• X-ray Absorption Spectroscopy
• Nickel Borate
• In Situ Measurement

Details

• CRID: 1390001206499801600
• NII Article ID: 130004562457
• NII Article ID: 40020051352
• NII Book ID: AN00151637
• DOI: 10.5796/electrochemistry.82.355
• ISSN: 21862451
• ISSN: 13443542
• NDL BIB ID: 025428460
• Web Site: http://id.ndl.go.jp/bib/025428460
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I025428460
• Web Site: https://www.jstage.jst.go.jp/article/electrochemistry/82/5/82_13-E00038/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Allowed