| Home | Organizers | Proceedings Editors | Proceedings Contributors | Search | | ||
|
|
|||
|
||||
|
|
||||
| Title: | PREPARATION AND CHARACTERIZATION OF NANOCRYSTALLINE Ce0.45Zr0.45La0.10O2-δ FOR METHANE OXIDATION REACTORS | |
| DOI No: | 10.1142/9789812701947_0091 | |
| Source: | PHYSICS, CHEMISTRY AND APPLICATION OF NANOSTRUCTURES (pp 405-408) | |
| Author(s): | E. V. FROLOVA
Research Institute for Physical Chemical Problems, Belarusian State University, Leningradskaya str., 14, 220050 Minsk, Belarus M. I. IVANOVSKAYA Research Institute for Physical Chemical Problems, Belarusian State University, Leningradskaya str., 14, 220050 Minsk, Belarus V. V. KHARTON Department of Ceramics and Glass Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal A. A. YAREMCHENKO Department of Ceramics and Glass Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal |
|
| Abstract: | Nanocrystalline Ce0.45Zr0.45La0.10O2-δ powder was prepared by organic-free modification of the sol-gel technique. Crystallization of amorphous precursor starts at 600 °C and results in the formation of highly dispersed (4÷5 nm) cubic fluorite solid solution, stable up to 1100 °C. The ESR studies showed that the incorporation of La(III) into the Zr0.5Ce0.5O2 lattice leads to increasing concentration of Ce3+ defects. This may contribute to the high catalytic activity towards partial oxidation of dry methane. The methane oxidation on composite Ce0.45Zr0.45La0.10O2-δ/Pt anodes in a model SOFC-type reactor provided 73 % CO selectivity with 54 % conversion efficiency at 900 °C and CH4:O2 ratio equal to 2. | |
| Full Text: | View full text in PDF format (347KB) | |
| TOC: | Back to Table of Contents | |
|
||