Structural and catalytic properties of copper oxide/nickel oxide modified zirconia prepared by sol-gel technique
Metadata of CSIR Papers
View Archive Info| Field | Value | |
| Title |
Structural and catalytic properties of copper oxide/nickel oxide modified zirconia prepared by sol-gel technique
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| Creator |
Dongare, M
Malshe, KM Gopinath, CS Tare, VB Kemnitz, E |
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| Subject |
Electrochemistry; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Materials Science, Characterization & Testing
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| Description |
Methane oxidation using CuO-ZrO2, CuO-Y2O3-ZrO2, CuO-Y2O3-CeO2-ZrO2 indicated that the last composition showed the maximum catalytic activity due to redox behavior of both Cu2+ and Ce4+ species as well as oxygen mobility. Investigation of the NiO-ZrO2 system showed that it is possible to obtain cubic fluorite phase, which is stable at temperatures below 873 K, at concentrations of nickel oxide varying from 2 to 15 mol%. The lattice constant decreased linearly with increasing concentration of NiO. The composition with 20 mol% NiO is also found to be cubic with fluorite structure and retains the same cubic structure even after prolonged heating at 1273 K with small amount of NiO. XPS spectra along with XRD data indicated that at low concentrations of NiO, Ni2+ enters zirconia lattice substitutionally creating oxygen vacancies. There is, however, some evidence of nickel occupying interstitial position also. NiO is found to be present as a separate phase with ZrO2 particles being surrounded by NiO phase above 15 mol%. Implications of the present results towards the catalytic activity and as an anode material are discussed.
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| Publisher |
ELECTROCHEMICAL SOCIETY INCPENNINGTON65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
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| Date |
2011-09-24T09:38:14Z
2011-09-24T09:38:14Z 2002 |
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| Type |
Proceedings Paper
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| Identifier |
HIGH TEMPERATURE MATERIALS, PROCEEDINGS
1-56677-371-7 http://hdl.handle.net/123456789/24180 |
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| Language |
English
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