Highly Dispersed and Stable Supported Metal Catalysts Prepared by Solid Phase Crystallization Method

Starting from the precursors containing active metal species in the crystal structure, highly dispersed supported metal catalysts have been prepared by the calcination-reduction treatment. This method is named as solid phase crystallization (spc) method and was compared with the conventional impregnation (imp) method. As the precursors, both perovskite-type and hydrotalcite-type oxides have been utilized for preparing various supported metal catalysts, which were successfully applied for the reforming of CH₄ and the decomposition of methanol. Especially spc-Ni/Mg–Al catalyst prepared from the hydrotalcite-type precursors showed high activity as well as high sustainability for the hydrogen production from methane.