Jodłowski P J, Jędrzejczyk R J, Rogulska A, Wach A, Kuśtrowski P, Sitarz M, Łojewski T, Kołodziej A, Łojewska J
Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 31-155 Kraków, Poland.
Jagiellonian University, Faculty of Chemistry, Ingardena 3, 30-060 Kraków, Poland.
Spectrochim Acta A Mol Biomol Spectrosc. 2014 Oct 15;131:696-701. doi: 10.1016/j.saa.2014.05.027. Epub 2014 May 23.
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.
该研究涉及一系列由钯和铈氧化物促进的钴氧化物组成的结构化催化剂的X射线光电子能谱（XPS）、拉曼光谱和能谱分析（EDX）。这项工作的目的是将从光谱分析中收集到的信息与甲烷燃烧动力学测试的信息联系起来，以建立所研究催化剂的基本结构-活性关系。活性最高的催化剂是掺杂少量钯的钴氧化物，它在与用于甲烷转化器的商业纯钯氧化物催化剂的对比中胜出。拉曼光谱和XPS分析表明，这种催化剂由钴尖晶石和钯氧化物组成。通过XPS和EDX方法对催化剂组成进行的定量分析表明，掺杂钯的钴催化剂表面富含钯氧化物，动力学参数表明其为甲烷燃烧提供了大量活性中心。
