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dc.contributor.authorLong, RQ
dc.contributor.authorWan, HL
dc.contributor.author万惠霖
dc.date.accessioned2012-08-08T01:47:58Z
dc.date.available2012-08-08T01:47:58Z
dc.date.issued1998-03-20
dc.identifier.citationAPPLIED CATALYSIS A-GENERAL,1997,159(1-2):45-58zh_CN
dc.identifier.issn0926-860X
dc.identifier.urihttp://dx.doi.org/10.1016/S0926-860X(97)00047-1
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/13444
dc.description.abstractThe use of SrF2 as a dopant of Y2O3 catalyst for oxidative coupling of methane apparently increased C-2 selectivity and yield under the same conditions. However, it simultaneously decreased both the acidity and basicity of the catalyst, indicating that there was no direct relationship between catalytic performance and acidity/basicity of the catalyst. The interaction between SrF2 and Y2O3 phase took place more or less in the course of the catalyst preparations, as proved by XRD results of the fresh and used catalysts. The intrinsic anionic vacancies in the catalyst would be favorable to the activation of molecular oxygen under the reaction conditions. ESR and in situ Raman spectral results showed that superoxide ion (O-2(-)) adspecies was observed on the surface of Oa-pretreated 67 mol% SrF2/Y2O3 catalyst at 973 K, which may be the active oxygen species for oxidative coupling of methane.zh_CN
dc.language.isoenzh_CN
dc.publisherELSEVIER SCIENCE BVzh_CN
dc.subjectmethanezh_CN
dc.subjectoxidative couplingzh_CN
dc.subjectSrF2zh_CN
dc.subjectY2O3zh_CN
dc.subjectoxygen specieszh_CN
dc.titleOxidative coupling of methane over SrF2/Y2O3 catalystzh_CN
dc.typeArticlezh_CN


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