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dc.contributor.authorZhu, Yihan
dc.contributor.authorLu, Weimin
dc.contributor.authorLi, Han
dc.contributor.authorWan, Huilin
dc.contributor.author万惠霖
dc.date.accessioned2011-05-24T04:39:09Z
dc.date.available2011-05-24T04:39:09Z
dc.date.issued2007-02
dc.identifier.citationJOURNAL OF CATALYSIS,2007,246(2):382-389zh_CN
dc.identifier.issn0021-9517
dc.identifier.urihttp://dx.doi.org/doi:10.1016/j.jcat.2006.12.019
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/9124
dc.description.abstractSelective modification of surface and bulk V5+/V4+ ratios in Mo-V-Te-O catalysts has been achieved using nitric acid and saturated ammonia solutions as pH adjustors. The addition of nitric acid strongly suppressed V4+ in the bulk but encouraged it on the surface. Because the bulk-phase compositions of Mo-V-Te-O catalysts varied only slightly, the changes in the catalytic performance for selective propane oxidation to acrolein resulted mainly from the variation of the bulk and surface V5+/V4+ ratios. The high concentration of surface V5+ that was responsible for propane activation led to high selectivity of propylene and high conversion of propane. Increased bulk V4+ might result in oxygen vacancies, which promote the electron and oxygen transfer so as to increase the selectivity of deep oxidation products (COx). A low bulk V4+ concentration prefers selective oxidation products; the yield of acrolein was as high as 21.4%. (c) 2007 Elsevier Inc. All rights reserved.zh_CN
dc.language.isoenzh_CN
dc.publisherACADEMIC PRESS INC ELSEVIER SCIENCEzh_CN
dc.subjectpropanezh_CN
dc.subjectselective oxidationzh_CN
dc.subjectV5+/V4+ ratiozh_CN
dc.subjectacroleinzh_CN
dc.subjectMo-V-Te-O catalystszh_CN
dc.subjectsurface and bulkzh_CN
dc.titleSelective modification of surface and bulk V5+/V4+ ratios and its effects on the catalytic performance of Mo-V-Te-O catalystszh_CN
dc.typeArticlezh_CN


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