Methane oxidation over SOFC anodes with nanocrystalline ceria-based phases

Autor:	M. I. Ivanovskaya, E. V. Frolova, João Rocha, Jorge R. Frade, Fernando M.B. Marques, Anabela A. Valente, Aleksey A. Yaremchenko, Vladislav V. Kharton
Rok vydání:	2006
Předmět:	Materials science Inorganic chemistry General Chemistry Electrolyte Cermet Condensed Matter Physics Nanocrystalline material Methane Catalysis chemistry.chemical_compound chemistry Anaerobic oxidation of methane General Materials Science Cubic zirconia Partial oxidation
Zdroj:	Solid State Ionics. 177:2179-2183
ISSN:	0167-2738
DOI:	10.1016/j.ssi.2006.04.037
Popis:	The electrocatalytic performance of cermet anodes comprising Pt and nanocrystalline ceria-based components, Pt-modified Ce 0.45 Zr 0.45 La 0.10 O 2− δ (CZLO) and Ce 0.8 Gd 0.2 O 2− δ (CGO), was evaluated for the oxidation of dry CH 4 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 :CH 4 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 CH 4 conversion, up to 84% and 87% respectively, can be achieved by incorporating Pt-modified CZLO catalyst at the reactor outlet.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::da883ab5d3dea9c029a85f0ede85b420 https://doi.org/10.1016/j.ssi.2006.04.037 Zobrazit plný text záznamu Full Text from ScienceDirect