Ni and Ni–Co Catalysts Based on Mixed Ce–Zr Oxides Synthesized in Isopropanol Medium for Dry Reforming of Methane

Single-phase Ce–Zr oxides with a fluorite structure were synthesized by the solvothermal method in an isopropanol medium. Synthesis was performed at the supercritical parameters of isopropanol. The effect of the synthesis parameters on the characteristics of the obtained materials (specific surface area, morphology, particle size, phase composition) was established. Ni (5 wt %) and Ni + Co (5 wt %) were deposited at a ratio of 1 : 1 by incipient wetness impregnation. The structure and properties of samples were characterized by physicochemical methods, such as X-ray diffraction, Raman spectroscopy, high-resolution transmission electron microscopy, and temperature-programmed reduction by hydrogen. The dependences of the conversion of reagents (CH 4 and CO 2 ), the yield of hydrogen, and the Ce/Zr ratio in the Dry reforming of methane (DRM) reaction on the composition of catalysts were studied. The effect of the composition of a deposited metallic component and the Ce/Zr ratio in the support on the catalytic properties and catalysts stability in the DRM reaction was shown.