In-situ XAS for niobium oxide catalyst on hydrogen absorption and desorption of magnesium

Toru Kimura, Hiroki Miyaoka, Nobuko Hanada, Takayuki Ichikawa

Research output: Contribution to journalArticle

Abstract

The variation of the niobium (Nb) oxide catalyst during hydrogen absorption and desorption reactions was investigated by in-situ X-ray absorption spectroscopy (XAS). Results indicated that H2 was easily dissociated on the catalyst because the hydrogen absorption kinetics was significantly improved, and then the hydrogen atoms were diffused through inside of the catalyst. Thus, the catalytic mechanism of Nb oxides is different from that of conventional metal catalysts, in which the dissociated H is moved on the surface of catalyst.

Original languageEnglish
Pages (from-to)107-111
Number of pages5
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume79
Issue number3
DOIs
Publication statusPublished - 2015 Mar 1
Externally publishedYes

Fingerprint

Niobium oxide
niobium oxides
X ray absorption spectroscopy
Magnesium
magnesium
Hydrogen
Desorption
absorption spectroscopy
desorption
catalysts
Catalysts
hydrogen
x rays
hydrogen atoms
Metals
Atoms
Kinetics
kinetics
metals

Keywords

  • Catalyst
  • Hydrogen storage materials
  • In-situ X-ray absorption spectroscopy (XAS)
  • Magnesium

ASJC Scopus subject areas

  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys
  • Condensed Matter Physics

Cite this

In-situ XAS for niobium oxide catalyst on hydrogen absorption and desorption of magnesium. / Kimura, Toru; Miyaoka, Hiroki; Hanada, Nobuko; Ichikawa, Takayuki.

In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, Vol. 79, No. 3, 01.03.2015, p. 107-111.

Research output: Contribution to journalArticle

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