DEHYDROGENATION CATALYST FOR FORMIC ACID, METHOD FOR PRODUCING HYDROGEN, AND METHOD FOR PRODUCING DEUTERIUM GAS OR DEUTERATED HYDROGEN

To provide a catalyst for dehydrogenation of formic acid which allows hydrogen, heavy hydrogen gas or heavy-hydrogenated hydrogen containing no carbon monoxide to be produced through dehydrogenation of formic acid in a highly efficient manner. A catalyst for dehydrogenation of formic acid, including: a multinuclear metal complex represented by the following Formula (1), a tautomer or stereoisomer thereof, or a salt thereof, where M 1 and M 2 denote transition metals and may be the same as or different from each other; Q 1 to Q 6 each independently denote carbon or nitrogen; R 1 to R 6 each independently denote, for example, a hydrogen atom, an alkyl group, a phenyl group, a nitro group, a halogen group, a sulfonate group (sulfo group); L 1 and L 2 each independently denote an aromatic anionic ligand or an aromatic ligand, and may be substituted by one or more substituents; Y 1 and Y 2 each independently denote any ligand or are absent; and m denotes a positive integer, 0, or a negative integer.