Abstract
In this article, a new type of Cu–Co–P alloy with different atomic ratios of Co/P has been successfully synthesized, in which the Co2P particles have been formed. By means of the melt-spinning and phase extraction technologies, the pure Co2P particles with various morphologies could be obtained. It has been found that with the atomic ratio of Co/P changing from 1:2, 1:1, 3:2 to 2:1, the Co2P particles exhibit the morphologies of hollow hexagonal and quadrangular prisms, short rod-shape, fine and near-spheroidal particles, fibers and spheres, respectively. Besides of the stoichiometry of reactants Co/P, the non-equilibrium solidification caused by melt-spinning might be another reason for the morphological evolution of the Co2P phase. The synthesis of Co2P particles by the in-situ melt reaction provides an efficient, stable, controllable and green environment-friendly preparation method, in which the Cu–P alloy is supplied as the phosphorus resource. Meanwhile, this discovery provides new opportunities for the synthesis of transition metal phosphides.
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