Abstract
Water-dispersible Ru (0) nanorods stabilized by Poly (N-vinyl-2-pyrrolidone) (PVP) were employed as catalyst in the hydrolysis of sodium borohydride (NaBH4). The hydrogen generation rate was determined as a function of solution temperature, NaBH4 concentration, and catalyst amount. Ru (0) nanorods were found to be highly active catalysts even at room temperature. Kinetics study indicated that the hydrolysis reaction was first order in catalyst concentration and zeroth order in substrate concentration. The activation parameters of the hydrolysis reaction were also determined from the evaluation of the kinetic data. The PVP-stabilized Ru (0) nanorods provided a lower apparent activation energy (Ea = 33.4 ± 1 kJ/mol) than bulk Ru(0) metal and other reported Ru-based supported catalysts for the hydrolysis of NaBH4.
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