Spectroscopy in Oxidation Catalysis

The fundamentals of the use of infrared spectroscopy in the research on solid oxidation catalysts are briefly summarized. The application of IR to a number of case studies is reported they include methanol partial and total oxidation and steam reforming, CO oxidation and water gas shift, methylaromatics selective oxidations, oxidative dehydrogenation of butenes to butadiene, total oxidation of halide hydrocarbons and oxygenates, selective catalytic reduction of NOx. 

In this chapter we will focus on the application of IR spectroscopy methods to oxidation catalysts. We will mainly summarize the work performed in our lab, discussing it in relation to the most relevant papers published in the recent international literature. 

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Application examples of in situ UV-vis and in situ EPR spectroscopy in oxidation catalysis... 

The importance of XAS spectroscopy in oxidation catalysis research results from its abiUty to provide information on the local structure of active redox sites under reaction-Uke conditions, which can often hardly be obtained by other methods, such as XRD which is restricted to crystaUine material, EPR spectroscopy which only detects species with unpaired electrons, or UV-vis diffuse reflectance and Raman spectroscopy which are less sensitive to strongly absorbing TMI in reduced valence states. Thus, in situ EXAFS has been widely used to determine the local environment and redox behaviour of TMI in nanoporous oxides. A typical example is discussed in 19.3.2.2a for Fe-ZSM-5 zeolites. Another major application is the determination of size and shape of supported metal clusters, especially for particles smaller than... 

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