Ni supported on YSZ: XAS and XPS characterization and catalytic activity for CO2 methanation
2017
Kesavan, Jagadesh Kopula | Luisetto, Igor | Tuti, Simonetta | Meneghini, Carlo | Battocchio, Chiara | Iucci, Giovanna
Ni supported on yttrium-stabilized zirconium oxide catalysts have been prepared by electroless plating method. Structure, electronic and chemical state of Ni as a function of Ni content (1, 7 and 12 wt%) have been characterized combining X-ray diffraction, X-ray absorption spectroscopy, X-ray photoelectron spectroscopy, temperature-programmed reduction (H₂-TPR) and BET. The catalytic activity for the CO₂ methanation was studied in the 250–500 °C temperature range, finding the highest CO₂ conversion and CH₄ selectivity for the catalyst with the largest Ni loading. A dependence of activity and CH₄ selectivity on Ni crystallites size was highlighted.
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