COMPOSITE OXIDE, METAL CARRIER AND AMMONIA SYNTHESIS CATALYST

Japanese Patent JP2023033614

A

To provide a composite oxide capable of further improving ammonia synthesis activity by carrying ruthenium or the like on a metal catalyst.SOLUTION: A composite oxide of the present invention is a composite oxide containing a metal element represented by the composition of general formula (1). AnXyMm (1)(In the general formula (1), A is a rare earth element characterized by being at least partially in a valence state of III, and X is any one of a Group 2 element, a Group 4 element, or a rare earth element of the periodic table, and is different from the A, M is any one of a Group 1 element, a group 2 element, a Group 4 element, or a rare earth element of the periodic table, and is different from the A and the X, n is 0