A novel hydrogen storage material: The hydrolysis products of sodium borohydride

In this study, HPSB (hydrolysis products of sodium borohydride) is introduced as a novel hydrogen storage material with a porous structure, synthesized through the hydrolysis of sodium borohydride. This hydrogen storage material reveals an impressive capability to ad/absorb large amount of hydrogen at room temperature conditions. The optimal hydrogen release for HPSB-Y2O3, HPSB-CeO2 and HPSB-Pr6O11 is 0.89 wt%, 1.06 wt%, and 2.08 wt%, respectively. Cyclic tests on HPSB-CeO2 and HPSB-Pr6O11 confirmed stable hydrogen release across five cycles, showcasing the excellent potential of HPSB materials for hydrogen storage. HPSB materials, with varied Y2O3 content, exhibit porous structures with lamellar arrangements. Increasing Y2O3 decreases hydrogen release efficiency. CeO2 and Pr6O11 substitution enhances dehydrogenation kinetics. Surface composition analysis reveals lamellar structures primarily consist of Na, Co, and O, while granular substances are rich in rare earth oxides (REO). BET surface area measurements confirm varying porosity. XPS and XRD analyses validate the non-crystalline nature of HPSB samples. Overall, HPSB materials demonstrate promising hydrogen storage potential.