Fabrication of non-equilibrium nanoparticles by selective leaching and their catalytic properties

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It has been found that selective leaching of Al on ternary Al alloys facilitates formation of nonequilibrium phases composed of remaining elements. This process can force the formation of non-equilibrium states which could no reached by melt-spinning method. By applying this process, we found that PdNi nanoparticles formed as a product of leached Al-Pd-Ni alloy showed high activity over CO oxidation reaction comparable with Pt. In summary, we have demonstrated that the leaching is not only a process synthesizing catalysts but also an available process for preparing nonequilibrium phases.