Enhancing the hydrogen transfer catalytic activity of hybrid carbon nanotube-based NHC–iridium catalysts by increasing the oxidation degree of the nanosupport
CVD-grown multiwalled carbon nanotubes were purified by applying four different treatments with increasing oxidation severity. The growing severity of the treatment results in progressive oxygen functionalization of the surface along with introduction of an increasing quantity of defects on the carbon nanotube walls. Iridium-N-heterocyclic carbene complexes were covalently anchored to those oxidized surfaces through their surface carboxylic acids via acetyl linkers. The carbon nanotube-based iridium-NHC hybrid materials developed are active in the hydrogen-transfer reduction of cyclohexanone to cyclohexanol with 2-propanol/KOH as hydrogen source but with rather different activity. The catalytic activity of the hybrid catalysts is strongly influenced by the type and amount of oxygenated functionalization resulting from the treatment applied to the support, being the most active and the most oxidized material.
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Royal Society of Chemistry (UK)
2016
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Online Access: | http://hdl.handle.net/10261/148463 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100003176 |
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dig-incar-es-10261-1484632018-11-15T07:54:08Z Enhancing the hydrogen transfer catalytic activity of hybrid carbon nanotube-based NHC–iridium catalysts by increasing the oxidation degree of the nanosupport Blanco, Matías Álvarez Rodríguez, Patricia Blanco Rodríguez, Clara Jiménez, M. Victoria Pérez-Torrente, Jesús J. Oro, Luis A. Blasco, Javier Cuartero, Vera Menéndez López, Rosa María Ministerio de Economía y Competitividad (España) European Commission Diputación General de Aragón Ministerio de Educación, Cultura y Deporte (España) CVD-grown multiwalled carbon nanotubes were purified by applying four different treatments with increasing oxidation severity. The growing severity of the treatment results in progressive oxygen functionalization of the surface along with introduction of an increasing quantity of defects on the carbon nanotube walls. Iridium-N-heterocyclic carbene complexes were covalently anchored to those oxidized surfaces through their surface carboxylic acids via acetyl linkers. The carbon nanotube-based iridium-NHC hybrid materials developed are active in the hydrogen-transfer reduction of cyclohexanone to cyclohexanol with 2-propanol/KOH as hydrogen source but with rather different activity. The catalytic activity of the hybrid catalysts is strongly influenced by the type and amount of oxygenated functionalization resulting from the treatment applied to the support, being the most active and the most oxidized material. The authors thank the Spanish Ministry of Economy and Competitiveness (MINECO/FEDER) (Projects Consolider Ingenio 2010 CSD2009-00050 and CTQ2013-42532-P) and the Diputación General de Aragón (FSE-E07 and FSE-E69) for their financial support. Dr. P. A. thanks MINECO for a Ramón y Cajal contract. M. B. acknowledges his fellowship from MECD (AP2010-0025). Peer Reviewed 2017-04-19T07:25:13Z 2017-04-19T07:25:13Z 2016 2017-04-19T07:25:14Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1039/c5cy01998b e-issn: 2044-4761 issn: 2044-4753 Catalysis Science and Technology 6(14): 5504-5514 (2016) http://hdl.handle.net/10261/148463 10.1039/c5cy01998b http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100003176 #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2013-42532-P Publisher's version https://doi.org/10.1039/c5cy01998b Sí open Royal Society of Chemistry (UK) |
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CVD-grown multiwalled carbon nanotubes were purified by applying four different treatments with increasing oxidation severity. The growing severity of the treatment results in progressive oxygen functionalization of the surface along with introduction of an increasing quantity of defects on the carbon nanotube walls. Iridium-N-heterocyclic carbene complexes were covalently anchored to those oxidized surfaces through their surface carboxylic acids via acetyl linkers. The carbon nanotube-based iridium-NHC hybrid materials developed are active in the hydrogen-transfer reduction of cyclohexanone to cyclohexanol with 2-propanol/KOH as hydrogen source but with rather different activity. The catalytic activity of the hybrid catalysts is strongly influenced by the type and amount of oxygenated functionalization resulting from the treatment applied to the support, being the most active and the most oxidized material. |
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Ministerio de Economía y Competitividad (España) |
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Ministerio de Economía y Competitividad (España) Blanco, Matías Álvarez Rodríguez, Patricia Blanco Rodríguez, Clara Jiménez, M. Victoria Pérez-Torrente, Jesús J. Oro, Luis A. Blasco, Javier Cuartero, Vera Menéndez López, Rosa María |
format |
artículo |
author |
Blanco, Matías Álvarez Rodríguez, Patricia Blanco Rodríguez, Clara Jiménez, M. Victoria Pérez-Torrente, Jesús J. Oro, Luis A. Blasco, Javier Cuartero, Vera Menéndez López, Rosa María |
spellingShingle |
Blanco, Matías Álvarez Rodríguez, Patricia Blanco Rodríguez, Clara Jiménez, M. Victoria Pérez-Torrente, Jesús J. Oro, Luis A. Blasco, Javier Cuartero, Vera Menéndez López, Rosa María Enhancing the hydrogen transfer catalytic activity of hybrid carbon nanotube-based NHC–iridium catalysts by increasing the oxidation degree of the nanosupport |
author_sort |
Blanco, Matías |
title |
Enhancing the hydrogen transfer catalytic activity of hybrid carbon nanotube-based NHC–iridium catalysts by increasing the oxidation degree of the nanosupport |
title_short |
Enhancing the hydrogen transfer catalytic activity of hybrid carbon nanotube-based NHC–iridium catalysts by increasing the oxidation degree of the nanosupport |
title_full |
Enhancing the hydrogen transfer catalytic activity of hybrid carbon nanotube-based NHC–iridium catalysts by increasing the oxidation degree of the nanosupport |
title_fullStr |
Enhancing the hydrogen transfer catalytic activity of hybrid carbon nanotube-based NHC–iridium catalysts by increasing the oxidation degree of the nanosupport |
title_full_unstemmed |
Enhancing the hydrogen transfer catalytic activity of hybrid carbon nanotube-based NHC–iridium catalysts by increasing the oxidation degree of the nanosupport |
title_sort |
enhancing the hydrogen transfer catalytic activity of hybrid carbon nanotube-based nhc–iridium catalysts by increasing the oxidation degree of the nanosupport |
publisher |
Royal Society of Chemistry (UK) |
publishDate |
2016 |
url |
http://hdl.handle.net/10261/148463 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100003176 |
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