报告人：Krijn P. de Jong
(Professor, Utrecht University
时间：07月08日（周五） 9 : 30
地点：化学工程楼学术报告厅（203）
Biography：
Krijn P. de Jong, scientific director of the Debye Institute for Nanomaterials Science of Utrecht University, member of the Academia Europaea, the editorial board of Journal of Catalysis, the Technology Advisory Council of BP, and the International Advisory Committee at the Key State Laboratory 'Physical Chemistry of Solid Surfaces' of Xiamen University. He worked in Shell Research from 1982-1997, and was appointed as full professor of inorganic chemistry and catalysis at Utrecht University in 1997. His current research interests are catalyst synthesis and assembly, hydrocarbon conversions over zeolites, solid catalysts for fine chemicals manufacture, conversion of synthesis gas and hydrogen storage. He has published over 200 scientific papers in Science, Nature, Chem. Rev., Chem. Soc. Rev., J Am. Chem. Soc., Angew. Chem. Int. Ed etc., and obtained the International Award for Excellence in Natural Gas Conversion, the Unilever Chemistry Award and the Shell Patent Award etc.
Abstract：
Nanostructured catalysts play a key role in processes ranging from oil refining to synthesis gas conversion. Zeolites are crystalline, microporous alumino-silicates that are widely applied in catalysis and separation. In this talk we intend to unravel the 3D nanostructure of complex zeolite catalysts using a.o. electron tomography [1, 2]. Mesoporous zeolites [2] facilitate mass transfer and restrict secondary reactions in e.g. hydrocracking. Electron tomography is used to assess the mesopore network and its consequences for catalysis [3]. Trimodal porosity combining micropores (~1 nm), **all mesopores (~3 nm) and large mesopores (20-50 nm) provided unique selectivity in hydrocracking [3]. The mesoporosity and microporosity of these zeolite Y samples has been quantified using advanced image ****ysis techniques [4]. Second, platinum loaded zeolite Y crystals have been studied. These Pt/Y crystals are widely used as bi-functional catalysts. In carefully synthesized Pt/Y crystals electron tomography revealed for the first time that within one zeolite Y crystal the Pt particles of 1-2 nm in size were uniformly dispersed, however, from one crystal to another the density of Pt particles varied up to a factor of 35 [5]. Third, we have varied the Pt location in Pt/Al2O3/Y catalysts. The control, characterization and impact of the location on hydrocracking of alkanes of will be presented [6].
References:
1. H. Friedrich, P.E. de Jongh, A.J. Verkleij and K.P. de Jong, Chem. Rev. 109 (2009) 1613-1629.
2. Y. Wei, T.E. Parmentier, K.P. de Jong, J. Zecevic, Chem. Soc. Rev. 44, (2015), 7234-7264.
3. K.P. de Jong, J. Zecevic, H. Friedrich, P.E. de Jongh, M. Bulut, S. van Donk, R. Kenmogne, A. Finiels, V. Hulea and F. Fajula, Angew. Chem. Int. Ed. 49 (2010) 10074-10078.
4. J. Zecevic, C.J. Gommes, H. Friedrich, P.E. de Jongh, K.P. de Jong, Angew. Chem. Int. Ed. 51 (2012) 4213-4217.
5. J. Zecevic, A.M.J. van der Eerden, H. Friedrich, P.E. de Jongh and K.P. de Jong, ACS Nano 7 (2013) 3698-3705.
6. J. Ze evi , G. Vanbutsele, K.P. de Jong, J.A. Martens, Nature 528 (2015), 245-254.
