Advanced Methods
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Prof. Albert V. Crewe, Fermi Institute
M. Jose Yacaman
ADVANCED METHODS of catalyst characterization This symposium, jointly sponsored with the American Chemical Society, focused on the ultrastructure of heterogeneous catalysts and the relationship betwen structure and catalytic activity. Characterization tools highlighted in the symposium included transmission electron microscopy (TEM), scanning TEM (STEM), electron energy loss spectroscopy (EELS), ion scattering spectroscopy (ISS), infrared characterization (IR), nuclear magnetic resonance (NMR), Mossbauer spectroscopy and extended X ray absorption fine structure (EXAFS). The symposium comprised 30 presentations from an international cast of participants. Countries represented included The Netherlands, France, Belgium, Mexico, England and the United States. A programming innovation was also incorporated. While all papers were presented in the usual lecture format, authors also prepared and displayed poster-format versions of their work for more extensive
scrutiny. Although these posters were unmanned, considerable information of a more detailed nature was made available to interested attendees of this and other symposia. Among the outstanding research achievements reported in the symposium, Albert V. Crewe of Fermilab reported on atomic resolution STEM imaging of Pt atoms on carbon. M.J. Yacama'n of the University of Mexico reported on the characterization by conventional TEM, albeit of ultra high resolution, of particles in the 25 - 200A range. J.M. Dominguez and G.W. Simmons similarly reported on the application of analytical STEM techniques to catalyst particles of only 20A size. In addition to these direct observation methods, considerable interest was generated by authors who described application of NMR techniques to catalyst research. These included N.T. Stokes et al of the University of Illinois, J.B. Nagy et al of Belgium, and J.M. Thomas of the University of Cambridge, England.
K. KLIER
Lehigh University Principal Support Office of Naval Research (D. Nelson) American Chemical Society Petroleum Research Fund Supplemental Support Air Products and Chemicals The Badger Company Exxon Research and Engineering Company Merck Sharp & Dohme Research Laboratories Mobil Research & Development Corporation Pfizer Shell Development Company Union Carbide Corporation
MRS BULLETIN, NOVEMBER/DECEMBER 1982, PAGE 11
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