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Time-Resolved and Operando XAS Studies on Heterogeneous Catalysts — From the Gas Phase Towards Reactions in Supercritical Fluids

Jan-Dierk Grunwaldt, Alfons Baiker
2007 AIP Conference Proceedings  

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X-ray absorption spectroscopy is a well-suited technique to uncover the structure of heterogeneous catalysts under reaction conditions. Different aspects of in situ cell design suitable for dynamic and catalytic studies are discussed. In addition, criteria are presented that allow estimating the influence external and internal mass transfer. Starting with studies on gas-solid reactions, including structure-activity relationships, this concept is extended to liquid-solid reactions, reactions at
more » ... igh pressure and in supercritical fluids. The following examples are discussed in more detail: partial oxidation of methane over Pt-Rh/Al 2 O 3 , reduction of a Cu/ZnO catalyst, alcohol oxidation over Bi-promoted Pd/Al 2 O 3 in liquid phase and over Pd/Al 2 O 3 in supercritical CO 2 , and batch reactions (e.g. CO 2 -fixation over zinc-based catalysts).
doi:10.1063/1.2644598 fatcat:jwodolizzrcfhd3f3ff3ev5xci
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Jan-Dierk Grunwaldt, Alfons Baiker. "Time-Resolved and Operando XAS Studies on Heterogeneous Catalysts — From the Gas Phase Towards Reactions in Supercritical Fluids." AIP Conference Proceedings (2007)