NiO/Ce1−xNixO2−δ as an alternative to noble metal catalysts for CO oxidation

Sk. Mahammadunnisa; P. Manoj Kumar Reddy; N. Lingaiah; Ch. Subrahmanyam

doi:10.1039/C2CY20641B

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NiO/Ce_1−xNi_xO_2−δ as an alternative to noble metal catalysts for CO oxidation†

Sk. Mahammadunnisa,^a P. Manoj Kumar Reddy,^a N. Lingaiah^b and Ch. Subrahmanyam*^a

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* Corresponding authors

^a Energy and Environmental Research Laboratory, Department of Chemistry, Indian Institute of Technology Hyderabad, Andhra Pradesh, India
E-mail: csubbu@iith.ac.in
Tel: +91-40-2301-6050

^b Catalysis Laboratory, I&PC Division, Indian Institute of Chemical Technology, Hyderabad, India

Abstract

A series of NiO/CeO₂ catalysts were prepared by using the combustion method and characterized by using XRD, N₂-physisorption, TEM, UV-visible, Raman, XPS, ICP-OES and H₂-TPR. Typical results indicated the NiO/CeO₂ had a better performance than CeO₂ for CO oxidation and 15 wt% NiO/CeO₂ is active and stable, whereas catalysts with a higher NiO content of 20 and 30 wt% deactivated at 130 °C onwards. The high activity and excellent stability of 15% NiO/CeO₂ catalysts can be ascribed to their high oxygen vacancy, high dispersion of NiO and strong metal–support interaction that leads to synergy between NiO and CeO₂.

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Article information

DOI: https://doi.org/10.1039/C2CY20641B
Article type: Paper
Submitted: 12 Sep 2012
Accepted: 29 Oct 2012
First published: 30 Oct 2012

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Catal. Sci. Technol., 2013,3, 730-736

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NiO/Ce_1−xNi_xO_2−δ as an alternative to noble metal catalysts for CO oxidation

Sk. Mahammadunnisa, P. Manoj Kumar Reddy, N. Lingaiah and Ch. Subrahmanyam, Catal. Sci. Technol., 2013, 3, 730 DOI: 10.1039/C2CY20641B

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