The influence of Ni stability, redox, and lattice oxygen capacity on catalytic hydrogen production via methane dry reforming in innovative metal oxide systems

Finding a robust catalytic system for hydrogen production via dry reforming of methane (DRM) remains challenge. Herein, MNi0.9Zr1−xYxO3 (M = Ce, La, and La0.6Ce0.4; x 0.00, 0.05, 0.07, 0.09) catalyst was prepared by the sol–gel method, tested DRM characterized surface area porosity, X-ray diffraction, H2-temperature programmed reduction, thermogravimetry, transmission electron microscopy. In La0.6Ce0.4NiO3 catalyst, substitution Ni 0.1% Zr results in constant high activity (83% yield at 800°C) due to presence reducible “NiO-species interacted strongly with support” (stable metallic over reduced catalyst) redox input ceria phase laying instant lattice oxygen during lag-off period CO2. Substitution Y CeNiO3 nurtures Ni3Y (providing highly stable CH4 decomposition) cerium yttrium oxide phases strong input). CeNi0.9Zr0.01Y0.09O3 shows 85% H2 800°C.