Co-P amorphous alloy and a new supported Co-P amorphous alloy catalyst CoP/TiO₂ were prepared respectively by reduction-chemical deposition method. The physical properties of the alloy catalysts were characterized by XRD, ICP, TEM, BET and DSC. The structure, composition, shape, surface area and thermal stabilities of Co-P and CoP/TiO₂ were compared. Besides, their catalytic activities for PH₃ decomposition were compared, too. Compared with Co-P particles, CoP/TiO₂ has bigger surface area, higher thermal stability and catalytic activity, which was attributed to interaction of TiO₂ support and catalyst and high dispersion of Co-P alloy particles on the support of TiO₂.

Key words: amorphous alloy, Co-P alloy, titania, supported catalyst