2000-10-1 · A safe, simple, compact process generates high-purity hydrogen gas on demand from base-stabilized, aqueous solutions of sodium borohydride, NaBH 4, by using a ruthenium, Ru, catalyst.These NaBH 4-based solutions can store up to 7% hydrogen by weight.NaBH 4 solutions do not generate significant amounts of H 2 gas under ambient conditions. However, when in contact with Ru catalyst, …