3rd Workshop on the Simultaneous Combination of Spectroscopies with X-ray Absorption, Scattering and Diffraction Techniques

Session

Catalysis Session 2

CAT2

5 Jul 2012, 09:00

Auditorium HG E 3 (<a href="http://www.ethz.ch/index_EN">ETH Zurich</a>)

10. In situ X-ray studies of model and real catalysts: Bridging the complexity gap

Prof. Anatoly Frenkel (Yeshiva University)

05/07/2012, 09:00

Materials / Nanomaterials

Invited oral contribution

In the last decade, there has been a surge in advancing synchrotron-based characterization methods to study catalytic materials. Most notable innovations include combining the X-ray absorption and scattering methods, and coupling of one or both of them to vibrational spectroscopies. I will report on recent developments at the Synchrotron Catalysis Consortium (SCC) at Brookhaven National...

55. In-situ QXAS investigation of the genesis of cobalt active phases in supported Fischer-Tropsch catalysts

Dr Andrei Khodakov (UCCS, CNRS, Université Lille 1, ENSCL, Ecole Centrale de Lille)

05/07/2012, 09:30

Catalysis

Oral contribution

Cobalt Fischer-Tropsch catalysts are typically prepared by impregnation, followed by calcination in oxidizing atmosphere and activation in hydrogen. Decomposition of cobalt nitrate is a crucial step in the genesis of active phase and could involve several short-living intermediate species. In the present work, in-situ quick X-ray absorption spectros-copy (QXAS) in combination with other...

21. Evidence for central carbon in nitrogenase FeMo cofactor

Mr Daniel Sippel (Institut für organische Chemie und Biochemie, Albert-Ludwigs-Universität Freiburg)

05/07/2012, 09:50

Catalysis

Oral contribution

The dissociation of the stable triple bond of atmospheric dinitrogen (N2) and the reduction to bioavailable ammonia (NH4+) is called nitrogen fixation. Biological nitrogen fixation is carried out by the nitrogenase1, an enzyme complex consisting under turnover condition of two metallo proteins, the MoFe- and the Fe-protein2. Nitrogen reduction takes place at the MoFe-protein, whereas the...

67. Identifying dynamic structural changes in catalysts with time and energy-resolved XAS and XES

Dr Maarten Nachtegaal (PSI)

05/07/2012, 10:10

Catalysis

Oral contribution

The directed development of new catalysts necessitates an understanding of the structure - performance relation. Two continuous developments at the SuperXAS beam line of the Swiss Light Source, sub second XAS and XES, allow determining the dynamic electronic and geometric structures of catalysts under in situ conditions. When combined with a quadrupole mass spectrometer or gas chromatograph,...