Oxynitride-hydride, metal-supported material containing oxynitride-hydride, and ammonia synthesis catalyst
AssigneeJapan Science and Technology Agency
InventorsMasaaki Kitano, Hideo Hosono, Toshiharu Yokoyama, Jun Kujirai, Kiya Ogasawara
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Abstract
The present invention is related to an oxynitride-hydride which is capable of achieving both stabilization and improvement of catalyst performance when used as a support, and the oxynitride-hydride can be easily synthesized. The oxynitride-hydride is represented by the following general formula (1), AnBmOl-xNyHz (1) wherein in the general formula (1), x represents a number represented by 0.1≤x≤3.5; y represents a number represented by 0.1≤y≤2.0; and z represents a number represented by 0.1≤z≤2.0.
Claims17
An oxynitride-hydride, which is represented by the following general formula (1),
- AnBmOl-xNyHz (1)
- wherein, in the general formula (1), A is at least one selected from the group consisting of Ba and Sr;
- B is at least one selected from the group consisting of Al, Ga, In, Si, and Ge;
- n is an integer of 1 to 3;
- m is 1 or 2;
- l is 4 or 5;
- x represents a number represented by 0.1≤x≤3.5;
- y represents a number represented by 0.1≤y≤2.0;
- and z represents a number represented by 0.1≤z≤2.0.
A method of producing an oxynitride-hydride represented by the following general formula (1), comprising:
- a step of heating a compound represented by the following general formula (2) and a compound represented by the following general formula (3) under an ammonia atmosphere,
- AnBmOl-xNyHz (1)
- A(NH2)2 (2)
- BkOj (3)
- wherein, in the general formulae (1) to (3), A is at least one selected from the group consisting of Ba and Sr;
- B is at least one selected from the group consisting of Al, Ga, In, Si, and Ge;
- n is an integer of 1 to 3;
- m is 1 or 2;
- l is 4 or 5;
- k is 1 or 2;
- j is 1 to 3;
- x represents a number represented by 0.1≤x≤3.5;
- y represents a number represented by 0.1≤y≤2.0;
- and z represents a number represented by 0.1≤z≤2.0.
A metal-supported material in which a transition metal (M) is supported on a support,
- wherein the support is a composition comprising an oxynitride-hydride which is represented by the following general formula (1),
- AnBmOl-xNyHz (1)
- wherein, in the general formula (1), A is at least one selected from the group consisting of Ba and Sr;
- B is at least one selected from the group consisting of Al, Ga, In, Si, and Ge;
- n is an integer of 1 to 3;
- m is 1 or 2;
- l is 4 or 5;
- x represents a number represented by 0.1≤x≤3.5;
- y represents a number represented by 0.1≤y≤2.0;
- and z represents a number represented by 0.1≤z≤2.0.
An ammonia synthesis catalyst, which is a composition comprising an oxynitride-hydride which is represented by the following general formula (1),
- AnBmOl-xNyHz (1)
- wherein, in the general formula (1), A is at least one selected from the group consisting of Ba and Sr;
- B is at least one selected from the group consisting of Al, Ga, In, Si, and Ge;
- n is an integer of 1 to 3;
- m is 1 or 2;
- l is 4 or 5;
- x represents a number represented by 0.1≤x≤3.5;
- y represents a number represented by 0.1≤y≤2.0;
- and z represents a number represented by 0.1≤z≤2.0.
Dependencies are inferred from the claim text.