Nanofabrication of Model Catalysts on TEM Windows

It is becoming more and more evident that in situ techniques are indispensable for future development in catalysis research, since catalyst properties during operation conditions can be dramatically different to those inferred from pre-and post-operation analyses [117,132]. It is well known that catalyst particles change shape, sinter into larger particles, or even may volatilize in the form of, for example, carbonyls, volatile oxides, or organometallic compounds in the course of a catalytic process, which in turn alter the surface kinetics occurring 

Finally, with EBL it is possible to prepare well-defined arrays of particles on the TEM membranes with both well-defined particle sizes and interparticle separation (both short- and long-range ordering). In Fig. 4.8, this is illustrated by an array of 50-nm wide and 15-nm thick Cu nanoparticles on Si02. There are three interparticle distances, 100, 200, and 500 nm, respectively. 

5 Experimental Case Studies with Nanofabricated Model Catalysts Catalytic Reactions and Reaction-Induced Restructuring 

In this section, we present experimental results for each of the planar model catalysts presented above. We have chosen to use CO oxidation at atmospheric pressure as the main model reaction. There have been several studies using simple reactions, like CO oxidation [29] or ethylene hydrogenation [68], and no 

we describe several approaches to study catalytic surface reactions (primarily CO oxidation) on lithographically fabricated model catalysts at atmospheric pressures, in UHV, and in electrocatalysis. In addition, we discuss reaction-induced restructuring of these lithographically fabricated samples. 

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