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

页码：2179 / 2183

页数：5

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