The Skeletal IR Spectra of Metal Oxides

IR spectroscopy is largely used for the characterization of metal oxide catalysts in relation to their structural features, with additional possible information on their morphology. Several collections of IR, Raman or both IR and Raman spectra of inorganic materials and minerals have been published, and are available electronically. In the following we will briefly review some of the applications of vibrational spectroscopies in the characterization of such materials. 

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Another example concerns C03 O4/AI2 O3 systems also used in the total oxidation of organics as well as precursors of supported Co metal catalysts. In Fig. 18.2 the skeletal IR spectra of the support Siralox 5 (alumina containing 5% Si02, from Sasol) and of two C03O4/AI2O3 catalysts are compared. 

Selected physical properties such as spectroscopy and magnetic chemistry reveal useful data on the general skeletal arrangement, bond strength, energy, and valency of metal Tu-complexes. In this chapter some of the details of infrared spectroscopy (IR), nuclear magnetic resonance (NMR), mass spectra, Mossbauer spectroscopy, magnetic susceptibility, and oxidation state are discussed in terms of the characterizations of metal 7i-complexes. 

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