Synergetic effect of oxides on hydrogen reaction kinetics of magnesium hydride

Aep Patah, Akito Takasaki, Janusz S. Szmyd

研究成果: Conference contribution

6 被引用数 (Scopus)

抄録

The kinetics of hydrogen reaction (absorption and desorption) on the MgH2 have been reported to be improved significantly by addition of transition metal oxides as catalysts. Among the oxides reported previously, Cr2O3 seems to improve hydrogen absorption kinetics and ND2O5 for desorption kinetics. The catalytic effect of addition of more than one oxide, however, has not been reported yet. We investigated the hydrogen reaction kinetics of ball milled MgH2 powders added with either Cr2O3 or ZnO together with Nb2O5. In absorption reaction, the hydrogen contents reached 6 wt% and 5.3 wt% in 5 min for the powders added with 1 mol% ZnO + 1 mol% Nb2O5 and with 1 mol% Cr2O3 + 1 mol% Nb2O5, respectively. Those powders desorbed hydrogen up to about 4.5 wt% in 20 min. The significant improvement was not expected if one of the oxides was added separately. The combination of two kinds of oxides might play an important role for improvement of reaction kinetics.

本文言語English
ホスト出版物のタイトルSelected, peer reviewed papers from The Sixth Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6
出版社Trans Tech Publications Ltd
ページ1605-1608
ページ数4
PART 2
ISBN(印刷版)0878494626, 9780878494620
DOI
出版ステータスPublished - 2007
イベント6th Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6 - Jeju, Korea, Republic of
継続期間: 2007 11月 52007 11月 9

出版物シリーズ

名前Materials Science Forum
番号PART 2
561-565
ISSN(印刷版)0255-5476
ISSN(電子版)1662-9752

Conference

Conference6th Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6
国/地域Korea, Republic of
CityJeju
Period07/11/507/11/9

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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