Methane oxidation over SOFC anodes with nanocrystalline ceria-based phases
authors Kharton, VV; Yaremchenko, AA; Valente, AA; Frolova, EV; Ivanovskaya, MI; Frade, JR; Marques, FMB; Rocha, J
nationality International
journal SOLID STATE IONICS
author keywords SOFC anode; methane oxidation; catalyst; nanocrystalline ceria; syngas generation
keywords SYNGAS
abstract 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.
publisher ELSEVIER SCIENCE BV
issn 0167-2738
year published 2006
volume 177
issue 19-25
beginning page 2179
ending page 2183
digital object identifier (doi) 10.1016/j.ssi.2006.04.037
web of science category Chemistry, Physical; Physics, Condensed Matter
subject category Chemistry; Physics
unique article identifier WOS:000242555200118
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journal impact factor 3.107
5 year journal impact factor 2.904
category normalized journal impact factor percentile 58.409
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