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dc.contributor.authorLundwall, Matthew J.
dc.contributor.authorMcClure, Sean M.
dc.contributor.authorWang, Xin
dc.contributor.authorWang, Zhou-jun
dc.contributor.authorChen, Ming-shu
dc.contributor.author陈明树
dc.contributor.authorGoodman, D. Wayne
dc.date.accessioned2013-02-25T01:35:49Z
dc.date.available2013-02-25T01:35:49Z
dc.date.issued2012-08-30
dc.identifier.citationJOURNAL OF PHYSICAL CHEMISTRY C,2012,116(34):18155-18159zh_CN
dc.identifier.issn1932-7447
dc.identifier.urihttp://dx.doi.org/10.1021/jp301824c
dc.identifier.uriWOS:000308120000021
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/14886
dc.description.abstractThe structure sensitivity of n-heptane dehydrocyclization has been evaluated on Pt nanoparticles as a function of Pt particle size. Pt particles were vapor-deposited onto a SiO2 surface in ultrahigh vacuum (UHV) and then run under near-atmospheric pressures (195 Torr) by transferring the samples in situ to a batch reactor connected to the UHV system. The results demonstrate that the reaction rate increases as the particle size is decreased from 4 to 1.5 nm, consistent with results on high surface area technical catalysts. However, as particle size is further decreased below 1.5 nm, the reaction rate decreases, thus providing evidence of an optimum particle size for the dehydrocyclization reaction under the experimental conditions. The reactions on the nanoparticles are also compared with results obtained on Pt(100) and Pt(110) single crystals, which were run in the same apparatus under identical conditions. The differences between supported and unsupported It demonstrate that nanoparticles deactivate at a slower rate than single crystals, which suggests participation from the underlying silica support.zh_CN
dc.description.sponsorshipDepartment of Energy, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences, and Biosciences [DE-FG02-95ER-14511]; Robert A. Welch Foundation [A-300]zh_CN
dc.language.isoenzh_CN
dc.publisherAMER CHEMICAL SOCzh_CN
dc.subjectPLATINUM CRYSTAL-SURFACESzh_CN
dc.subjectPRESSUREzh_CN
dc.subjectDEHYDROGENATIONzh_CN
dc.subjectHYDROGENATIONzh_CN
dc.subjectSPECTROSCOPYzh_CN
dc.subjectCONVERSIONzh_CN
dc.subjectPARTICLESzh_CN
dc.subjectMECHANISMzh_CN
dc.subjectGROWTHzh_CN
dc.titleThe Structure-Sensitivity of n-Heptane Dehydrocyclization on Pt/SiO2 Model Catalystszh_CN
dc.typeArticlezh_CN


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