国重室邀请国际著名催化学家Michel Che教授来访biwn必赢，并做“卢嘉锡讲座”。Michel Che教授曾先后任欧洲催化学会主席、国际催化委员会主席等要职，是界面配位化学领域的开拓者之一，他对多相催化过程不同阶段进行了宏观到分子水平的研究，取得的成果桥联了分子化学和固体化学之间的空间，为界面配位化学领域的创立做出了巨大贡献。
欢迎各位感兴趣的课题组老师和同学前往听取报告。
题 目: Relevance of Geochemistry to the Life of a Catalyst: When Fire Meets Water
讲座人: Prof. Michel Che
Université Pierre et Marie Curie, France
时 间: 12月18日（周五）10:00-12:00
地 点: 卢嘉锡202报告厅
点击此处下载Prof. Michel Che简历。报告题目：Relevance of Geochemistry to the Life of a Catalyst: When Fire
Meets Water
报告人：
Prof. Michel Che
Universite Pierre et Marie Curie
Institute Universitaire de France
报告摘要：85-90% of all chemical processes are catalytic and 80-85% of the
latter use solid catalysts. The importance of supported catalysts that
contribute for 75% of solid catalysts comes from the variety of
reactions they are able to promote [1a,1b]. In the industry, their
preparation involves a series of unit operations [1a], such as
deposition of a precursor of the active phase on the oxide support
from an aqueous solution, elimination of the solvent, drying,
calcination, sulfidation and reduction. In unit operations, both the
liquid-solid and gas-solid interfaces are involved. Compared to the
latter, the liquid-solid interface has been rather neglected [2]
despite the fact that different methods of deposition (incipient
wetness impregnation, equilibrium adsorption or
deposition-precipitation) affect the final properties of the catalyst.
This is a clear indication that the phenomena initially occurring at
the solid-liquid interface do contribute to the final properties of
the catalyst.
In order to investigate catalysts preparation, we have developed a
molecular approach based on transition metal complexes and stable
isotopes [3] as well as suitable spectroscopies [4] to investigate the
liquid-solid interface. We have shown that catalysts preparation is
related to several fields of chemistry and in particular colloid
science, electrochemistry, supramolecular chemistry, coordination
chemistry and geochemistry, giving thus a conceptual framework to the
science of catalysts preparation.
While earlier studies have largely discussed the relevance of
coordination chemistry to the science of catalysts preparation as well
as the role of the oxide support as solid ligand, the present lecture
will focus on geochemistry and the role of the oxide support as
reactant. The major contribution of geochemistry has been to improve
our understanding of the so-called ageing with subsequent formation of
mixed species or phases on oxide supports, under conditions where the
latter can dissolve. It will be shown that water and heating are the
key parameters and are at stakes during all the steps of the catalyst
life (preparation, reaction and regeneration).
References
[1] a) Handbook of heterogeneous catalysis, 2nd Ed., G. Ertl, H.
Knozinger, F. Schüth, J. Weitkamp Eds, Wiley-VCH, Weinheim, 2008, 8
volumes; b) J.M. Thomas, W.J. Thomas, Principles and practice of
heterogeneous catalysis, 2nd Ed., Wiley-VCH, Weinheim, 2014.
[2] F. Zaera, Chem. Rev. 112 (2012) 2920.
[3] M. Che, Stud. Surf. Sci. Catal. 75A (1993) 31 and 130A (2000) 115.
[4] Characterization of solid materials and heterogeneous catalysts:
From structure to surface reactivity, M. Che and J.C. Védrine Eds,
Wiley-VCH, Weinheim, 2012, 2 volumes.
