Intermetallic compound, hydrogen storage/release material, catalyst and method for producing ammonia
AssigneesJapan Science and Technology Agency, Tokyo Institute of Technology
InventorsHideo Hosono, Yutong Gong, Jiazhen Wu, Masaaki Kitano, Toshiharu Yokoyama, Yangfan Lu, Tiannan Ye
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Abstract
Provided are an intermetallic compound having high stability and high activity, and a catalyst using the same. A hydrogen storage/release material containing an intermetallic compound represented by formula (1): RTX . . . (1) wherein R represents a lanthanoid element, T represents a transition metal in period 4 or period 5 in the periodic table, and X represents Si, Al or Ge.
Claims9
A transition metal-supported intermetallic compound comprising a transition metal M supported on an intermetallic compound represented by formula (1):
- RTX (1)
- wherein
- R represents a lanthanoid element,
- T represents a transition metal in period 4 or period 5 in the periodic table, and
- X represents Si, Al or Ge.
A transition metal-supported complex comprising a transition metal M supported on an intermetallic compound-hydrogen complex represented by formula (2), wherein the intermetallic compound is capable of storing and releasing hydrogen reversibly and the complex is capable of releasing hydrogen at 400° C. or less:
- RTX·aH (2)
- wherein
- R represents a lanthanoid element,
- T represents a transition metal in period 4 or period 5 in the periodic table,
- X represents Si, Al or Ge and
- a represents a number of 0.5 or more and 1.5 or less.
A method for producing ammonia, comprising contacting nitrogen and hydrogen with a catalyst, wherein the catalyst comprises an intermetallic compound represented by formula (1):
- RTX (1)
- wherein
- R represents a lanthanoid element,
- T represents a transition metal in period 4 or period 5 in the periodic table, and
- X represents Si, Al or Ge.
Dependencies are inferred from the claim text.