The invention relates to the method for hydrogen generation from solid hydrogen storage compositions. This is achieved by thermal decomposition of ammonia borane (AB) in the presence of silicon nanoparticles. With addition of silicon nanoparticles, decomposition of AB was found to be less exothermic and the second step of decomposition was found to be slightly endothermic suggesting hydride formation. Induction period was absent with silicon nanoparticles and also increase in the amount of gas released was found.