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Nickel boride alloys,Ni-B,were prepared using chemical reduction method by the reaction of metal chloride with sodium borohydride,and heat-treated at various temperatures. The structures of the as-prepared alloys were studied using X-ray diffractometry(XRD),scanning electronic microscopy(SEM) and nitrogen adsorption-desorption analysis. When being adopted as the catalysts for successive hydrogen generation from sodium borohydride solution,the Ni-B alloy treated at 90 ℃ achieves a maximum hydrogen generation rate of 15.4 L/(min·g),and an average hydrogen generation rate of 13.6 L/min,which can give successive hydrogen supply to a 2.2 kW PEMFC at a hydrogen utilization of 100%.
Nickel boride alloys, Ni-B, were prepared using chemical reduction method by the reaction of metal chloride with sodium borohydride, and heat-treated at various temperatures. The structures of the as-prepared alloys were studied using X-ray diffractometry (XRD) , when scanning electron microscopy (SEM) and nitrogen adsorption-desorption analysis. When being the catalysts for successive hydrogen generation from sodium borohydride solution, the Ni-B alloy treated at 90 ° C achieves a maximum hydrogen generation rate of 15.4 L / (min · G), and an average hydrogen generation rate of 13.6 L / min, which can give successive hydrogen supply to a 2.2 kW PEMFC at a hydrogen utilization of 100%.