Reactive adsorption overview

Although numerous reviews on the characteristics of carbonaceous materials have been published [51-54,59-63], in this chapter we focus on a detailed description of carbon surface chemistry and its importance for catalytic processes and those involving reactive adsorption. Thus, the classification of surface groups is followed by an overview of methods of surface modification and characterization, with a brief description and examples of their role in reactive adsorption and catalysis. 

The fifth contribution by M. Putkonen and L. NiinistO presents an overview of Organometallic Precursors for Atomic Layer Deposition (ALD). The key principle of ALD in contrast to CVD is the exclusion of any gas-phase prereaction allowing the thin film growth to be fully controlled by surface reactions and adsorption/desorption kinetics. ALD is thus ideally suited for the growth of ultra-thin layers and atomically abrupt interfaces needed in future nanoelectronic devices. While CVD and ALD have many aspects in common, precursors suitable for ALD generally need to be much more reactive than those used for CVD. Another challenge is to combine low steric demand with very high selectivity of the surface reactions. 

In the development of zeolite science, infrared spectroscopy has been one of the major tools for structure and reactivity characterization. However, the field of zeolite Raman spectroscopy is gaining importance. The Raman effect is an intrinsically weak phenomenon, and Raman spectra of zeolites are often obscured by a broad fluorescence. Just like IR spectroscopy, Raman can detect small. X-ray amorphous zeolite particles. Therefore, Raman spectroscopy has been used to examine zeolite synthesis mixtures with ex-situ methods (with separation of solid and liquid) and in-situ methods. In this work we give an overview of the zeolite framework vibrations, zeolite synthesis, adsorption on zeolites and metal substitution and ion exchange in zeolites. 

The interfacial reactivity of metalloporphyrins and chlorins is critically determined by their specific adsorption at the liquid/liquid junctions. The affinity of the water-soluble porphyrins for these interfaces is associated with their complex solvation structure arising from the hydrophobic central ring and peripheral ionisable groups. This chapter will also feature a brief overview on recent studies of the molecular organisation of water-soluble porphyrins as probed by a variety... 

This section is dedicated to the main focus of the UHV experiments in this thesis, the electronic structure of metal surfaces, supported metal clusters and adsorbate interactions. In the light of the idea to tune reactivity by the modification of the catalyst (i.e. size) a brief introduction of adsorption and the electronic stmcture of the catalyst adsorbate interaction is given Further, an overview over EES results on metal particles and clusters is presented, followed by a sections about EES of adsorbates and the data treatment for comparison to gas phase spectra, applied in this work. 

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