Prasad, D. Hari and Jung, H. Y. and Jung, H. G. and Kim, B. K. and Lee, H. W. and Lee, J. H. (2008) Single step synthesis of nano-sized NiO-Ce0.75Zr0.25O2 composite powders by glycine nitrate process. Materials Letters, 62 (4-5). 587 - 590.
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Single step synthesis of NiO–Ce0.75Zr0.25O2 and Ce0.75Zr0.25O2 powders was successfully achieved by glycine nitrate process (GNP). In this method, a precursor solution is prepared by mixing glycine with an aqueous solution of mixed (Ni, Ce–Zr) metal nitrates in the requisite quantities. The precursor was heated to evaporate excess water, yielding a honey-like liquid. Further heating the precursor at above 200 °C caused the precursor liquid to auto-ignite. Cubic fluorite nature of Ce0.75Zr0.25O2 and NiO phases was identified by XRD for the as-prepared samples. SEM and TEM analysis illustrate the foamy microstructural nature and the particle sizes of range 35–50 nm and 12–18 nm with a BET surface area of 5.5 and 29.2 m2/g for NiO–Ce0.75Zr0.25O2 and Ce0.75Zr0.25O2 powders respectively. Catalytic performance for partial oxidation of methane of Ni–Ce0.75Zr0.25O2 showed 58% methane conversion for a time period of 12 h with good H2 and CO selectivity along with H2/CO ratio of 2.
|Uncontrolled Keywords:||Glycine nitrate process; Nano-materials; Ceria–zirconia; Catalysts; SOFC|
|Subjects:||Material Science > Nanofabrication processes and tools|
Material Science > Nanostructured materials
|Deposited On:||10 Feb 2010 09:16|
|Last Modified:||10 Feb 2010 09:16|
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