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dc.contributor.authorZhang, Qinghong
dc.contributor.author张庆红
dc.contributor.authorDeng, Weiping
dc.contributor.authorWang, Ye
dc.contributor.author王野
dc.date.accessioned2012-03-30T01:39:38Z
dc.date.available2012-03-30T01:39:38Z
dc.date.issued2011-05-31
dc.identifier.citationCHEMICAL COMMUNICATIONS,2011,47(33):9275-9292zh_CN
dc.identifier.issn1359-7345
dc.identifier.urihttp://dx.doi.org/doi:10.1039/c1cc11723h
dc.identifier.uriWOS:000293648200002
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/11941
dc.description.abstractThe size of the active phase is one of the most important factors in determining the catalytic behaviour of a heterogeneous catalyst. This Feature Article focuses on the size effects in two types of reactions, i.e., the metal nanoparticle-catalysed dehydrogenation of alcohols and the metal oxide nanocluster-catalysed selective oxidation of hydrocarbons (including the selective oxidation of methane and ethane and the epoxidation of propylene). For Pd or Au nanoparticle-catalysed oxidative or non-oxidative dehydrogenation of alcohols, the size of metal nanoparticles mainly controls the catalytic activity by affecting the activation of reactants (either alcohol or O(2)). The size of oxidic molybdenum species loaded on SBA-15 determines not only the activity but also the selectivity of oxygenates in the selective oxidation of ethane; highly dispersed molybdenum species are suitable for acetaldehyde formation, while molybdenum oxide nanoparticles exhibit higher formaldehyde selectivity. Cu(II) and Fe(III) isolated on mesoporous silica are highly efficient for the selective oxidation of methane to formaldehyde, while the corresponding oxide clusters mainly catalyse the complete oxidation of methane. The lattice oxygen in iron or copper oxide clusters is responsible for the complete oxidation, while the isolated Cu(I) or Fe(II) generated during the reaction can activate molecular oxygen forming active oxygen species for the selective oxidation of methane. Highly dispersed Cu(I) and Fe(II) species also function for the epoxidation of propylene by O(2) and N(2)O, respectively. Alkali metal ions work as promoters for the epoxidation of propylene by enhancing the dispersion of copper or iron species and weakening the acidity.zh_CN
dc.description.sponsorshipNational Natural Science Foundation of China[20625310, 20773099, 20873110, 20923004, 21033006]; National Basic Research Program of China[2010CB732303]zh_CN
dc.language.isoenzh_CN
dc.publisherROYAL SOC CHEMISTRYzh_CN
dc.titleEffect of size of catalytically active phases in the dehydrogenation of alcohols and the challenging selective oxidation of hydrocarbonszh_CN
dc.typeArticlezh_CN


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