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

• Published in: Energy science & engineering Vol. 11; no. 4; pp. 1436 - 1450
• Main Authors: Abasaeed, Ahmed E., Sofiu, Mahmud L., Acharya, Kenit, Osman, Ahmed I., Fakeeha, Anis H., AL‐Otaibi, Raja Lafi, Ibrahim, Ahmed A., Al‐Awadi, Abdulrhman S., Bayahia, Hossein, Al‐Zahrani, Salma A., Kumar, Rawesh, Al‐Fatesh, Ahmed Sadeq
• Format: Journal Article
• Language: English
• Published: London John Wiley & Sons, Inc 01.04.2023; Wiley
• Subjects: Acids; Carbon; Carbon dioxide; Catalysts; Catalytic activity; CeNi0.9Zr1−xYxO3; Cerium; Cerium oxides; dry reforming; H2 yield; Heat resistance; Hydrogen; Hydrogen production; La0.6Ce0.4Ni0.9Zr1−xYxO3 catalyst system; Metal oxides; Metals; Methane; Oxidation; Oxygen; Porosity; Reforming; Sol-gel processes; Stainless steel; Substitutes; Synthesis gas; Thermogravimetry; X-ray diffraction; Yttrium; Yttrium oxide; Zirconium
• ISSN: 2050-0505; 2050-0505
• DOI: 10.1002/ese3.1402

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