Highly selective Pd/titanate nanotube catalysts for the double-bond migration reaction |
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| Affiliation: | 1. Catalysis and Reaction Engineering Group, Department of Chemical Engineering, University of Bath, Bath BA2 7AY, UK;2. Electrochemical Engineering Group, School of Engineering Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, UK;3. Department of Chemistry, University of York, York YO10 5DD, UK;1. UNESP – Univ Estadual Paulista, Instituto de Química de Araraquara, Departamento de Química Geral e Inorgânica, P.O. Box 355, Araraquara, São Paulo 14801-970, Brazil;2. Clermont–Université, ICCF, Université Blaise Pascal, CNRS, UMR 6296, F-63177 Aubière cedex, France;3. Clermont–Université, Université Blaise Pascal, GreD UMR 6247 CNRS, INSERM U931, 24 Avenue des Landais, 63177 Aubière Cedex, France;4. UNESP – Univ Estadual Paulista, Faculdade de Ciências Farmacêuticas de Araraquara, Departamento de Análises Clínicas, P.O. Box 502, Araraquara, São Paulo 14801-902, Brazil;1. Instituto de Carboquímica (CSIC), C/Miguel Luesma 4, 50018 Zaragoza, Spain;2. Department of Chemical Engineering, University of Bath, Bath BA2 7AY, UK;3. Departament d’Enginyeria Química, Universitat de València, C/Dr. Moliner 50, 46100, Burjassot, Valencia, Spain;4. Department of Applied Physics and Electromagnetism, Universitat de Valencia, C/Dr. Moliner 50, 46100 Burjassot, Valencia, Spain;1. Department of Physics, Anadolu University, TR-26470 Eski?ehir, Turkey;2. Department of Physics, Eski?ehir Osmangazi University, TR-26480 Eski?ehir, Turkey;1. SFI Strategic Research Cluster in Solar Energy Conversion, UCD School of Chemistry and Chemical Biology, UCD Science Centre, University College Dublin, Belfield, Dublin 4, Ireland;2. SFI Strategic Research Cluster in Solar Energy Conversion, UCD School of Chemical and Bioprocess Engineering, University College Dublin, Belfield, Dublin 4, Ireland |
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| Abstract: | Pd(II) and Pd(0) catalysts supported onto titanate nanotubes (H2Ti3O7) were prepared by an ion-exchange technique. The catalysts are characterised by narrow size distribution of metal nanoparticles on the external surface of the nanotubes. Pd(II) catalysts show high selectivity toward double-bond migration reaction versus hydrogenation in linear olefins. The catalytic activity exhibits a volcano-type dependence on the metal loading, with the maximum activity observed at ca. 8 wt%. The Pd(II) was shown to be rapidly reduced to Pd(0) by appropriate choice of solvent. Prereduced Pd(0) catalysts were found to be less active toward double-bond migration and more selective toward hydrogenation. The DBM reaction was faster in protic solvents, such as methanol or ethanol. |
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