Kinetics of carbon monoxide oxidation over YBaCuO perovskites

Autor:	Jonathan C. Otamiri, S.L.T. Andersson
Rok vydání:	1991
Předmět:	chemistry.chemical_classification Inorganic chemistry General Engineering chemistry.chemical_element Oxygen balance Oxygen Catalysis chemistry.chemical_compound chemistry Methanizer Carbon dioxide Compounds of carbon Electrochemical reduction of carbon dioxide Carbon monoxide
Zdroj:	Applied Catalysis. 73:267-280
ISSN:	0166-9834
DOI:	10.1016/0166-9834(91)85141-h
Popis:	The kinetics of carbon monoxide oxidation over YBa 2 Cu 3 O 6+x and PrBa 2 Cu 3 O 6+x catalysts was investigated in the temperature range 160 to 200°C and a single rate expression for all catalysts was derived. A reaction mechanism consistent with the kinetics is proposed: it involves the formation of carbon dioxide via two routes. In these, carbon monoxide reacts with either mobile lattice oxygen or with adsorbed oxygen species to give carbon dioxide. Oxygen-deficient samples are more active than oxygen-rich samples due to higher concentrations of oxygen surface vacancies and defects. The presence of water significantly diminishes activity reversibly, probably as a result of competitive adsorption with carbon monoxide.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3c064b894fca9be66d2fc9208c00b898 https://doi.org/10.1016/0166-9834(91)85141-h Zobrazit plný text záznamu