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dc.contributor.authorZhao, Evanen
dc.contributor.authorZheng, Haibinen
dc.contributor.authorZhou, Ronghuien
dc.contributor.authorHagelin-Weaver, Helena Een
dc.contributor.authorBowers, Clifford Ren
dc.date.accessioned2021-03-25T00:30:22Z
dc.date.available2021-03-25T00:30:22Z
dc.date.issued2015-11en
dc.identifier.issn1433-7851
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/319163
dc.description.abstractIntense para-hydrogen-enhanced NMR signals are observed in the hydrogenation of propene and propyne over ceria nanocubes, nano-octahedra, and nanorods. The well-defined ceria shapes, synthesized by a hydrothermal method, expose different crystalline facets with various oxygen vacancy densities, which are known to play a role in hydrogenation and oxidation catalysis. While the catalytic activity of the hydrogenation of propene over ceria is strongly facet-dependent, the pairwise selectivity is low (2.4% at 375 °C), which is consistent with stepwise H atom transfer, and it is the same for all three nanocrystal shapes. Selective semi-hydrogenation of propyne over ceria nanocubes yields hyperpolarized propene with a similar pairwise selectivity of (2.7% at 300 °C), indicating product formation predominantly by a non-pairwise addition. Ceria is also shown to be an efficient pairwise replacement catalyst for propene.
dc.description.sponsorshipACS‐PRF. Grant Number: 52258‐ND5 NSF. Grant Number: CHE‐1507230
dc.format.mediumPrint-Electronicen
dc.languageengen
dc.rightsAll rights reserved
dc.titleShaped Ceria Nanocrystals Catalyze Efficient and Selective Para-Hydrogen-Enhanced Polarization.en
dc.typeArticle
prism.endingPage14275
prism.issueIdentifier48en
prism.publicationDate2015en
prism.publicationNameAngewandte Chemie (International ed. in English)en
prism.startingPage14270
prism.volume54en
dc.identifier.doi10.17863/CAM.66281
dcterms.dateAccepted2015-08-01en
rioxxterms.versionofrecord10.1002/anie.201506045en
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2015-11en
dc.contributor.orcidZhao, Evan [0000-0003-2233-8603]
dc.identifier.eissn1521-3773
rioxxterms.typeJournal Article/Reviewen
rioxxterms.freetoread.startdate2016-11-30


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