NOVELTY - Production of hydrogen involves dehydrocoupling at least one amine-borane compound in the presence of at least one ligand-stabilized metal catalyst (A1) in an inert solvent and, optionally, in the presence of a base, where the metal catalyst comprises at least one ligand that bonds to the metal through a nitrogen; and optionally collecting hydrogen produced in the dehydrocoupling of the at least one amine borane.    USE - For dehydrocoupling of amine-borane compound useful for the production of hydrogen; for the preparation of linear, branched or cyclic polymer; in hydrogen generation system comprising hydrogen fuel cell such proton exchange membrane fuel cell (PEMFC) (claimed) which is used as electrical generator. The hydrogen produced by the method is useful for portable power sources, such as, fuel cells.    ADVANTAGE - The process generates hydrogen rapidly.    DETAILED DESCRIPTION - Production of hydrogen involves dehydrocoupling at least one amine-borane compound of the formula R1R2N-BHR3R4 (I) in the presence of at least one ligand-stabilized metal catalyst (A1) in an inert solvent and, optionally, in the presence of a base, where the metal catalyst comprises at least one ligand that bonds to the metal through a nitrogen; and optionally collecting hydrogen produced in the dehydrocoupling of the at least one amine borane.    R1-R4=1-20C alkyl or 6-14C aryl (both optionally substituted), H, or fluoro-substituted 1-20C alkyl;or    any two of R1-R4 are linked=2-10C alkylene (optionally substituted by 1-6C alkyl, halo, halo-substituted 1-6C alkyl, 3-10C cycloalkyl, aryl or heteroaryl);or    any two of R1-R4 together with nitrogen and/or boron atoms=ring.    INDEPENDENT CLAIMS are included for the following:    (1) hydrogen generation system comprising the amine borane compound (I), at least one ligand-stabilized metal catalyst, an inert solvent and, optionally, base, where the metal catalyst comprise at least one ligand that bonds to the metal through a nitrogen;    (2) new linear, branched or cyclic polymer comprising a repeating unit of formula -(N(R1)(R2)-B(R3)(R4))n- (II);    (3) preparation of the linear, branched or cyclic polymer comprising repeating unit (II) involving reacting the amine-borane compound (I), in the presence of the ligand-stabilized metal catalyst in an inert solvent and, optionally, in the presence of a base.    n= greater than or equal to 2.