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dc.contributor.authorAmoroso, Francesco
dc.contributor.authorColussi, Sara
dc.contributor.authordel Zotto, Alessandro
dc.contributor.authorLlorca Piqué, Jordi
dc.contributor.authorTrovarelli, Alessandro
dc.contributor.otherUniversitat Politècnica de Catalunya. Institut de Tècniques Energètiques
dc.date.accessioned2013-11-28T13:20:35Z
dc.date.created2013-06-01
dc.date.issued2013-06-01
dc.identifier.citationAmoroso, F. [et al.]. Room-temperature Suzuki-Miyaura reaction catalyzed by Pd supported on rare earth oxides: Influence of the point of zero charge on the catalytic activity. "Catalysis letters", 01 Juny 2013, vol. 143, núm. 6, p. 547-554.
dc.identifier.issn1011-372X
dc.identifier.urihttp://hdl.handle.net/2117/20834
dc.description.abstractFive Pd/REO (rare earth oxide) compounds (Pd/La2O3, Pd/CeO2, Pd/Pr6O11, Pd/Sm2O 3, and Pd/Gd2O3) have been successfully used as precatalysts in the Suzuki-Miyaura C-C cross-coupling reaction of aryl bromides with arylboronic acids in ethanol/water at r.t. All Pd/REO showed high activity and selectivity. The effective catalyst arises from palladium leaching from the REO support. We have demonstrated that the activity of each Pd/REO (the decreasing order is Pd/La2O3 > Pd/Pr6O 11 > Pd/Gd2O3 > Pd/Sm2O 3 ≫ Pd/CeO2) is strictly related to the corresponding PZC (point of zero charge) value. Accordingly, it can be reasonably argued that the metal is released in solution in the form of Pd2+, and higher is the amount of positive charge on the surface in catalytic conditions, higher is the concentration of Pd2+ ions in solution and faster is the formation of the coupling product. Also the recycling of each Pd/REO is strictly connected with the PZC value of the REO support. As a matter of fact, Pd/CeO2, which has the lowest PZC value (6.7), shows the best reusability, according to its lower tendency to release Pd2+ ions in solution.
dc.format.extent8 p.
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria química::Química física
dc.subjectÀrees temàtiques de la UPC::Enginyeria química::Química del medi ambient::Geoquímica
dc.subject.lcshChemical reactions
dc.subject.lcshPalladium
dc.subject.otherC-C bond formation
dc.subject.otherMetal leaching
dc.subject.otherPalladium
dc.subject.otherPoint of zero charge
dc.subject.otherRare earth oxides
dc.subject.otherSuzuki-Miyaura reaction
dc.titleRoom-temperature Suzuki-Miyaura reaction catalyzed by Pd supported on rare earth oxides: Influence of the point of zero charge on the catalytic activity
dc.typeArticle
dc.subject.lemacReaccions químiques
dc.subject.lemacGeoquímica ambiental
dc.contributor.groupUniversitat Politècnica de Catalunya. GREENER - Grup de recerca d'estudis energètics i de les radiacions
dc.identifier.doi10.1007/s10562-013-1008-4
dc.relation.publisherversionhttp://link.springer.com/article/10.1007%2Fs10562-013-1008-4
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac12738644
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
local.citation.authorAmoroso, F.; Colussi, S.; Del Zotto, A.; Llorca, J.; Trovarelli, A.
local.citation.publicationNameCatalysis letters
local.citation.volume143
local.citation.number6
local.citation.startingPage547
local.citation.endingPage554


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