127874 20260211104146.0 doi 10.1016/j.carbon.2014.11.016 sideral 94136 ART-2015-94136 eng Blanco, Matías Graphene-NHC-iridium hybrid catalysts built through -OH covalent linkage Dedicated to the lasting Memory of Prof. Dr. María Pilar García for her valuable talent as human, teacher and chemist 2015 Access copy available to the general public Unrestricted Graphene oxide (GO) and thermally reduced graphene oxide (TRGO) were covalently modified with imidazolium salts through their hydroxyl surface groups. The selective reaction of the -OH groups with p-nitrophenylchloroformate produced labile intermediate organic carbonate functions which were used for the covalent anchoring of a hydroxy-functionalized imidazolium salt. Nanohybrid materials containing iridium N-heterocyclic carbene (NHC)-type organometallic complexes were prepared by causing the imidazolium-functionalized materials to react with Ir(µ-OMe)(cod)]2. The iridium content of the graphene-based hybrid catalysts, as determined by XPS and ICP-MS was the order of ~5 and 10 wt.%, for the TRGO and GO-based materials, respectively. The graphene-supported iridium hybrid materials were active in the heterogeneous hydrogen-transfer reduction of cyclohexanone to cyclohexanol with 2-propanol/KOH as the hydrogen source. The thermally reduced graphene-NHC-iridium hybrid catalyst showed the best catalytic performance with an initial TOF of 11.500 h-1, slightly better than the related acetoxy-functionalized NHC iridium homogeneous catalyst. A good catalyst recyclability and stability were achieved. info:eu-repo/grantAgreement/ES/MINECO/CSD2009-00050 info:eu-repo/grantAgreement/ES/MINECO/CTQ2013-42532-P info:eu-repo/semantics/openAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es 6.198 2015 MATERIALS SCIENCE, MULTIDISCIPLINARY 27 / 270 = 0.1 2015 Q1 T1 CHEMISTRY, PHYSICAL 24 / 144 = 0.167 2015 Q1 T1 1.988 2015 Chemistry (miscellaneous) 2015 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Álvarez, Patricia Blanco, Clara Jiménez, M. Victoria Universidad de Zaragoza (orcid)0000-0002-0545-9107 Fernández-Tornos, Javier Pérez-Torrente, Jesús J. Universidad de Zaragoza (orcid)0000-0002-3327-0918 Oro, Luis A. Universidad de Zaragoza (orcid)0000-0001-7154-7239 Menéndez, Rosa 2010 760 Universidad de Zaragoza Dpto. Química Inorgánica Área Química Inorgánica 83 (2015), 21-31 Carbon Carbon 0008-6223 1506663 http://zaguan.unizar.es/record/127874/files/texto_completo.pdf Postprint 752562 http://zaguan.unizar.es/record/127874/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:127874 articulos driver 2026-02-11-10:38:22 ARTICLE