Abstract:

The effects of reaction temperature, stabilizer (NaOH and CH₃COONa), concentrations of NaBH₄ and reactants on the activity of catalyst loaded on carbon fiber prepared by means of diploadreduction were investigated. Catalyst was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and the hydrolysis dynamics of sodium borohydride was studied. The experimental results show that in the presence of carbon fiber load Co-B catalyst in amorphous form and 0.19 mol/L NaOH stabilizer, at 40 ℃ under alkaline conditions, hydrogen production rate is nearly 96% for catalytic hydrolysis of NaBH4 for about 10 min and hydrolysis reaction is approximately the first order reaction at low sodium borohydride concentration.

Key words: sodium borohydride, hydrogen production, CoB catalyst/carbon fiber, kinetics