Electrochromic characteristics of a nickel borate thin film investigated by in situ XAFS and UV/vis spectroscopy

Masaaki Yoshida; Tsuyoshi Iida; Takehiro Mineo; Takumi Yomogida; Kiyofumi Nitta; Kazuo Kato; Hiroaki Nitani; Hitoshi Abe; Tomoya Uruga; Hiroshi Kondoh

doi:10.5796/electrochemistry.82.355

Electrochromic characteristics of a nickel borate thin film investigated by in situ XAFS and UV/vis spectroscopy

Masaaki Yoshida, Tsuyoshi Iida, Takehiro Mineo, Takumi Yomogida, Kiyofumi Nitta, Kazuo Kato, Hiroaki Nitani, Hitoshi Abe, Tomoya Uruga, Hiroshi Kondoh

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

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 700nm 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.

Original language	English
Pages (from-to)	355-358
Number of pages	4
Journal	Electrochemistry
Volume	82
Issue number	5
DOIs	https://doi.org/10.5796/electrochemistry.82.355
Publication status	Published - 2014 May

Keywords

Electrochromism
In situ measurement
Nickel borate
X-ray absorption spectroscopy

ASJC Scopus subject areas

Electrochemistry

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10.5796/electrochemistry.82.355

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title = "Electrochromic characteristics of a nickel borate thin film investigated by in situ XAFS and UV/vis spectroscopy",

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 700nm 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.",

keywords = "Electrochromism, In situ measurement, Nickel borate, X-ray absorption spectroscopy",

author = "Masaaki Yoshida and Tsuyoshi Iida and Takehiro Mineo and Takumi Yomogida and Kiyofumi Nitta and Kazuo Kato and Hiroaki Nitani and Hitoshi Abe and Tomoya Uruga and Hiroshi Kondoh",

year = "2014",

month = may,

doi = "10.5796/electrochemistry.82.355",

language = "English",

volume = "82",

pages = "355--358",

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publisher = "Electrochemical Society of Japan",

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TY - JOUR

T1 - Electrochromic characteristics of a nickel borate thin film investigated by in situ XAFS and UV/vis spectroscopy

AU - Yoshida, Masaaki

AU - Iida, Tsuyoshi

AU - Mineo, Takehiro

AU - Yomogida, Takumi

AU - Nitta, Kiyofumi

AU - Kato, Kazuo

AU - Nitani, Hiroaki

AU - Abe, Hitoshi

AU - Uruga, Tomoya

AU - Kondoh, Hiroshi

PY - 2014/5

Y1 - 2014/5

N2 - 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 700nm 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.

AB - 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 700nm 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.

KW - Electrochromism

KW - In situ measurement

KW - Nickel borate

KW - X-ray absorption spectroscopy

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JO - Electrochemistry

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Electrochromic characteristics of a nickel borate thin film investigated by in situ XAFS and UV/vis spectroscopy

Abstract

Keywords

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