Application of EPR to the Study of Catalysis,
DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)
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Since many free radical intermediates are postulated in catalytic mechanisms and since many of the commercially important catalysts are supported transition metal compounds, the method of electron paramagnetic resonance EPR should be a useful tool for the study of catalytic processes. EPR can, for example, provide detailed information about the symmetry of the catalytic site, about its oxidation state and about the interaction of adsorbed species with the site. Much information can also be obtained about paramagnetic intermediates formed on the surface such as identification of the species, studies of surface reactions involving these species, and molecular motion on the surface. The authors illustrate some of the above points by discussing selected examples which illustrate the application of EPR to catalysis. A brief review of the parts of EPR theory necessary to understand the examples to be discussed is included.
- Atomic and Molecular Physics and Spectroscopy