题目：Carbon nanotube-gold nanohybrids: design, synthesis and evaluation as heterogeneous catalysts
报告人：法国原子能与可替代能源委员会Dr. Edmond GRAVEL
时间：2014年11月5日上午10:30-11:30
地点：同安二201
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biwn必赢
2014年10月29日
摘要：Recent developments have led to the discovery of highly active heterogeneous catalytic systems. Among these, supported nanoparticulate catalysts have gained increasing interest as they provide clean, selective, and efficient reactions. In addition, the hybrid-supported metals offer the possibility of recovering the catalyst, thus permitting its reuse. Numerous metals, including gold, have been assembled onto solid supports although metallic gold has traditionally been regarded as a poor catalytic species. The catalytic activity of bulk gold is nevertheless dramatically enhanced when downsized to nanometric particles (AuNPs). This peculiar behavior of nano-gold has recently boosted its use in fine chemical synthesis applied, for example, to selective hydrogenations, carbon-carbon bonds formation, or oxidations. Various materials can be used as support for metal nanoparticles including metal oxides (Al2O3, SiO2…), clays, zeolites, polymers, amorphous carbon etc. When compared to other supports, carbon nanotubes (CNTs) have some advantages that include low cost, chemical, thermal and mechanical stability, inertness, high surface area, and chemically tunable topography.1 Moreover, CNTs are electronically active and can contribute to the stabilization of transient higher oxidation states of the metals.
We recently reported a novel carbon nanotube-gold nanohybrid (AuCNT) that was synthesized using a layer-by-layer strategy. This original catalyst was then applied to a wide variety of organic transformations.2-4
文献：
1. J. John, E. Gravel, I. N. N. Namboothiri, E. Doris, Nanotechnol. Rev. 2012, 1, 515–539.
2. J. John,E. Gravel, A. Hagège, H. Li, T. Gacoin, E. Doris, Angew. Chem. Int. Ed.2011, 50, 7533–7536.
3. a) R. Kumar, E. Gravel, A. Hagège, H. Li, D. V. Jawale, D. Verma, I. N. N. Namboothiri, E. Doris, Nanoscale2013, 5, 6491–6497; b) R. Kumar, E. Gravel, A. Hagège, H. Li, D. Verma, I. N. N. Namboothiri, E. Doris, ChemCatChem2013, 5, 3571–3575; .
4. a) D. V. Jawale, E. Gravel, V. Geertsen, H. Li, N. Shah, I. N. N. Namboothiri, E. Doris, ChemCatChem2014, 6, 719–723; b) D. V. Jawale, E. Gravel, V. Geertsen, H. Li, N. Shah, R. Kumar, J. John, I. N. N. Namboothiri, E. Doris, Tetrahedron2014, 70, 6140–6145; c) N. Shah, E. Gravel, D. V. Jawale, E. Doris, I. N. N. Namboothiri, ChemCatChem2014, 6, 2201–2205; d) N. Shah, E. Gravel, D. V. Jawale, E. Doris, I. N. N. Namboothiri, ChemCatChem2014, DOI: 10.1002/cctc.201402782.
Biography:
Dr. Edmond Gravel studied pharmacy at the Paris-Sud 11 University (France), where he obtained his PharmD in 2007 and received his Ph.D. under the guidance of Prof. ErwanPoupon in 2008. He then joined the group of Eric Doris as a post-doctoral fellow at the Alternative Energies and Atomic Energy Commission of France (CEA). He was appointed as a permanent researcher in the Nanoscience group in 2009. His research interests focus on bioactive natural products, supramolecular self-assemblies, heterogeneous catalysis, and nanomaterials for biomedical applications.
