title: Spectroscopic characterization of Co3O4 catalyst doped with CeO2 and PdO for methane catalytic combustion.
abstract: The study deals with the XPS, Raman and EDX characterization of a series of structured catalysts composed of cobalt oxides promoted by palladium and cerium oxides. The aim of the work was to relate the information gathered from spectroscopic analyses with the ones from kinetic tests of methane combustion to establish the basic structure-activity relationships for the catalysts studied. The most active catalyst was the cobalt oxide doped with little amount of palladium and wins a confrontation with pure palladium oxide catalyst which is commercially used in converters for methane. The analyses Raman and XPS analyses showed that this catalyst is composed of a cobalt spinel and palladium oxide. The quantitative approach to the composition of the catalysts by XPS and EDX methods revealed that the surface of palladium doped cobalt catalyst is enriched with palladium oxide which provides a great number of active centres for methane combustion indicated by kinetic parameters.
authors.affiliation: Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 31-155 Kraków, Poland. Electronic address: jodlowski@chemia.pk.edu.pl.
authors.forename: P J
authors.initials: PJ
authors.lastname: Jodłowski
authors.affiliation: Jagiellonian University, Faculty of Chemistry, Ingardena 3, 30-060 Kraków, Poland.
authors.forename: R J
authors.initials: RJ
authors.lastname: Jędrzejczyk
authors.affiliation: Jagiellonian University, Faculty of Chemistry, Ingardena 3, 30-060 Kraków, Poland.
authors.forename: A
authors.initials: A
authors.lastname: Rogulska
authors.affiliation: Jagiellonian University, Faculty of Chemistry, Ingardena 3, 30-060 Kraków, Poland.
authors.forename: A
authors.initials: A
authors.lastname: Wach
authors.affiliation: Jagiellonian University, Faculty of Chemistry, Ingardena 3, 30-060 Kraków, Poland.
authors.forename: P
authors.initials: P
authors.lastname: Kuśtrowski
authors.affiliation: Faculty of Materials Science and Ceramics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Sitarz
authors.affiliation: Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 31-155 Kraków, Poland.
authors.forename: T
authors.initials: T
authors.lastname: Łojewski
authors.affiliation: Institute of Chemical Engineering, Polish Academy of Sciences, Bałtycka 5, 44-100 Gliwice, Poland; Faculty of Civil Engineering, Opole University of Technology, Katowicka 48, 45-061 Opole, Poland.
authors.forename: A
authors.initials: A
authors.lastname: Kołodziej
authors.affiliation: Jagiellonian University, Faculty of Chemistry, Ingardena 3, 30-060 Kraków, Poland.
authors.forename: J
authors.initials: J
authors.lastname: Łojewska
mesh_terms: D002384:Catalysis; D002563:Cerium / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D008697:Methane / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D013052:Spectrometry, X-Ray Emission; D013059:Spectrum Analysis, Raman
chemical_list: D010087:Oxides; D002563:Cerium; D003035:Cobalt; D010165:Palladium; C030583:ceric oxide; C048320:palladium oxide; D008697:Methane; C060728:cobalt oxide
keywords: Cobalt oxide; Combustion; Methane; Palladium promoted catalysts; Structured catalysts