Atomization energy approach to the quantitative evaluation of catalytic activities of metal oxides during dehydrogenation of MgH2

H. Hirate, M. Morinaga, H. Yukawa, H. Nakai

研究成果: Article査読

4 被引用数 (Scopus)

抄録

The hydrogen desorption reaction of magnesium hydride (MgH2), MgH2 Mg + H2, is accelerated by mixing catalytic metal oxides (e.g., Nb2O5). This catalytic effect is evaluated quantitatively using the atomization energy concept. The measured hydrogen desorption rate increases monotonously with increasing y × ΔE O values of metal oxides, MxOy. Here, ΔEO, is the atomization energy for the oxide ion in M xOy. This indicates that the oxide ion interacts mainly with hydrogen atom in MgH2, in agreement with the observation of the O-H stretching mode in the FT-IR spectra during the dehydrogenation of the Nb2O5-catalyzed MgH2. This approach is also proved to be useful for the catalytic analysis of metal chlorides (e.g., TiCl3) on the decomposition reaction of NaAlH4 expressed as, NaAlH4 (1/3)Na3AlH6 + (2/3)Al + H 2.

本文言語English
ページ(範囲)S612-S615
ジャーナルJournal of Alloys and Compounds
509
SUPPL. 2
DOI
出版ステータスPublished - 2011 9 1

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

フィンガープリント 「Atomization energy approach to the quantitative evaluation of catalytic activities of metal oxides during dehydrogenation of MgH<sub>2</sub>」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル