Stability of alkaline aqueous solutions of sodium borohydride

作者：Minkina Valentina G; Shabunya Stanislav I; Kalinin Vladimir I; Martynenko Vladimir V; Smirnova Alevtina L^*

来源：International Journal of Hydrogen Energy, 2012, 37(4): 3313-3318.

DOI：10.1016/j.ijhydene.2011.10.068

• Hydrogen storage
• Hydrogen generation
• Sodium borohydride
• Rate of hydrolysis

Experimental results regarding long-term stability of the alkaline-water borohydride solutions for hydrogen generation are presented. The influence of the concentration of sodium borohydride and sodium hydroxide on the rate of borohydride hydrolysis is analyzed at various temperatures, such as 25 degrees C, 40 degrees C, and 80 degrees C, and various concentrations of NaOH. The rate of hydrolysis decreases with the increase of the water to sodium borohydride mole ratio. For diluted solutions at H2O/NaBH4 >30, the rate of hydrolysis and hydrogen generation at a given temperature remains constant. At room temperature in 1.0 N NaOH, the degree of hydrolysis is 0.01% NaBH4/h that meets the stability requirements for the borohydride solutions during the long-term storage.

• 出版日期2012-2