Methane oxidation over SOFC anodes with nanocrystalline ceria-based phases

被引：7
|
作者：
Kharton, V. V. [1 ]
Yaremchenko, A. A.
Valente, A. A.
Frolova, E. V.
Ivanovskaya, M. I.
Frade, J. R.
Marques, F. M. B.
Rocha, J.
机构：
[1] Univ Aveiro, Dept Ceram, CICECO, P-3810193 Aveiro, Portugal
[2] Belarusian State Univ, Inst Physicochem Problems, Minsk 220050, BELARUS
[3] Univ Aveiro, Dept Chem, CICECO, P-3810193 Aveiro, Portugal
来源：
SOLID STATE IONICS | 2006年 / 177卷 / 19-25期
关键词：
SOFC anode; methane oxidation; catalyst; nanocrystalline ceria; syngas generation;
D O I：
10.1016/j.ssi.2006.04.037
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The electrocatalytic performance of cermet anodes comprising Pt and nanocrystalline ceria-based components, Pt-modified Ce0.45Zr0.45-La0.1O2-delta (CZLO) and Ce0.8Gd0.2O2-delta (CGO), was evaluated for the oxidation of dry CH4 in a SOFC-type reactor with zirconia-based electrolyte. At temperatures above 1100 K, CZLO-containing cermet exhibits a high activity towards the partial oxidation of methane, probably promoted by instability of the cubic fluorite lattice. For the stoichiometric O-2:CH4 ratio equal to 0.5, the CO yield over CZLO/Pt anode is 73% with 54% conversion at 1173 K. Further increase in the CO selectivity and CH4 conversion, up to 84% and 87% respectively, can be achieved by incorporating Pt-modified CZLO catalyst at the reactor outlet. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：2179 / 2183
页数：5
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