▎ 摘　　要

Graphene supported Pt/Co bimetallic nanoparticles(GBNPS) were prepared using a chemical co.reduction method. The obtained GBNPS were characterized by transmission electron microscope(TEM), high.resolution transmission electron microscopy(HRTEM), X-ray diffraction(XRD) and X. ray photoelectron spectroscopy(XPS). The effects of metal compositions on the hydrolysis reaction of the alkaline KBH4 solution were studied. The results indicated that the average particle size of GBNPS was from 3.2 nm to 3.9 nm. Pt20Co80 GBNPS displayed the highest catalytic activity, showing a high hydrogen release rate of 35973.35 mol(H2).h(-1).mol(Pt)(-1) at 35 degrees C. Pt-20 Co-80 GBNPS showed the corresponding apparent activation energy of 36 kJ/mol for the hydrolysis of an alkaline KBH4.