Photon Tools for Physical Chemistry 2014

Session

Session 6 Catalysis, Surfaces and Reacted Clusters (Jeroen van Bokhoven)

1 Oct 2014, 14:50

47. X-ray absorption spectroscopy on catalysts, a photon tool to determine structure – performance relationsX-ray absorption spectroscopy on catalysts, a photon tool to determine structure – performance relations

Jeroen van Bokhoven (Paul Scherrer Institut)

01/10/2014, 14:50

Catalysts are the enabling technology for conversion and synthesis of energy and chemicals. To increase the sustainability of chemicals and fuels production, new and better processes must be developed, which requires the development of new and better catalysts. Their design is greatly helped by the fundamental understanding of why one catalyst is a better one than another. To this end, in situ...

49. Photoelectron spectroscopy of size-selected cluster ions using synchrotron radiation

Prof. Gerd Ganteför (University of Konstanz)

01/10/2014, 15:15

Talk

Catalytic properties of metal clusters exhibit a pronounced size dependence. In general, catalytic properties depend on the chemisorption bond between the molecule (e.g., CO) and the catalyst. One well studied case is the chemisorption of CO to metal surfaces. Depending on the metal, the 4 sigma, 1 pi and 5 sigma orbitals which form the bond show strong variations in binding energy. For...

39. Application of Strong VUV Light Sources in Chemical Dynamics Research

Prof. Xueming Yang (Dalian Institute of Chemical Physics)

01/10/2014, 16:10

Talk

Xueming Yang State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China Abstract Strong VUV light sources are essential in the study of chemical reaction dynamics because of it potential for highly sensitive and high resolution detection of atomic, molecular and radical species through VUV...

41. Catalysis and Electrocatalysis by Clusters: Size, Composition and Support Effects

Dr Stefan Vajda (Materials Science Division and Nanoscience and Technology Division Argonne National Laboratory, Argonne, IL 60439, USA)

01/10/2014, 16:35

Talk

The elucidation of the size, composition, shape, structure and function relationship, of the effect of support along with the determination and control of the nature of the catalytic particles under reaction conditions are instrumental for addressing fundamental aspects of catalysis on the way to the design and understanding the function of existing and new classes of cluster-based catalytic...

55. Identifying the transient phase in CO oxidation by XAS spectroscopy

Urs Hartfelder (ETH Zurich)

01/10/2014, 17:00

Talk

Supported platinum catalysts for the oxidation of carbon monoxide adopt different structures depending on temperature and reactant concentrations. These structures, which show vastly different activity, can be identified by X-ray absorption spectroscopy (XAS). While the low-temperature, low-activity state and the high-temperature, high-activity state are each well characterized, there is...

57. In situ XAS of ceria redox materials under relevant conditions for solar thermochemical fuel generation

Mr Matthäus Rothensteiner (PSI/ETH Zurich)

01/10/2014, 17:20

Talk

The conversion and storage of solar energy by generating fuels from H2O and CO2 using thermochemical redox cycles driven by concentrated solar radiation present a viable pathway towards a sustainable and environmentally benign energy future. A two-step cycle based on non-stoichiometric ceria that requires challenging operation conditions - typically 1773 K for the reduction and 1073 K for...