On the nature of oxidic nickel phases in NiO/γ-Al2O3 catalysts

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Abstract

Investigations on the characterization of oxidic nickel phases in NiO/γ-Al2O3 catalysts in a wide temperature range were carried out by means of temperature-programmed reduction (TPR), oxidation (TPO)and X-ray diffraction (XRD) methods. The results suggest a bimodal nature of oxidic nickel species that are “fixed” to the support. The differences in reducibility of catalysts calcined and reoxidized at the same temperatures were shown.

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