Role of lattice oxygen in methane activation on Ni-phyllosilicate@Ce1-xZrxO2 core-shell catalyst for methane dry reforming: Zr doping effect, mechanism, and kinetic study
نویسندگان
چکیده
• Core-shell Ni-phyllosilicate@Ce 1-x Zr x O 2 catalysts with high coke resistance for DRM. Optimum doping in shell doubles catalyst activity (TOF) TOF increase upon caused by higher lattice oxygen content of and SMSI. Mechanism & kinetic study conducted to probe role DRM activity. Lattice Ce facilitates CH 4 dissociation at metal/support interface. Sandwich structured core-shell Ni-Phyllosilicate@Ce are reported Optimal loading (x = 0.05 – 0.1) the is observed significantly intrinsic Extensive characterization using HRTEM, XRD, TPR, -TPD, XPS, EXAFS CO pulse chemisorption indicates that enhancement can be attributed mobility ceria-zirconia stronger metal-support interaction Ni. It inferred from a rigorous mechanism not only participates oxidation carbonaceous reaction intermediates but also rate determining step C H bond on Ni an oxygen-mediated pathway. The involvement methane activation manifests Zr-doped maximum storage capacity.
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ژورنال
عنوان ژورنال: Applied Catalysis B-environmental
سال: 2021
ISSN: ['1873-3883', '0926-3373']
DOI: https://doi.org/10.1016/j.apcatb.2021.119998