Hydrogen generation and storage by aqueous sodium borohydride (NaBH4) hydrolysis for small portable fuel cells (H2 e PEMFC)

Abstract

The present study reports original experimental work on hydrogen generation as an energy carrier for portable power applications. Nowadays, the progress of handheld devices implies the need for a fully reliable electricity supply and consequently a sudden on-demand on H-2 production/storage. In view of this issue, an innovator mini-reactor (9 cm(3)) with an ovoid geometry and a capability to generate and store hydrogen up to eight successive injections of fuel was designed. Hydrogen was generated from the catalytic hydrolysis of sodium borohydride (NaBH4), and both single and successive loadings were performed with excess of water (x = 16), at room temperature, in the presence of a powder unsupported Ni-Ru reused catalyst. The obtained results give emphasis to the importance of the reactor geometry and reveals the aptitude of the catalyst to be reused during successive loads of fuel without any treatment and minor loss of activity. Overall, the generated data from this work may provide novel insights to establish a hydrogen based economy for portable applications.