Properties of metal oxides

Table 8.3. Properties of metal oxide phosphonic acid cements (Ellis, 1989 Ellis Wilson, 1991)...

Ellis, J. Wilson, A. D. (1992). The formation and properties of metal oxide poly(vinylphosphonic acid) cements. Dental Materials, 8, 79-84. 

Although the band model explains well various electronic properties of metal oxides, there are also systems where it fails, presumably because of neglecting electronic correlations within the solid. Therefore, J. B. Good-enough presented alternative criteria derived from the crystal structure, symmetry of orbitals and type of chemical bonding between metal and oxygen. This semiempirical model elucidates and predicts electrical properties of simple oxides and also of more complicated oxidic materials, such as bronzes, spinels, perowskites, etc. 

Busca, G. (1998) Spectroscopic characterization of the acid properties of metal oxide catalysts, Catal. Today, 41, 191. 

It was found that acidic or basic properties of metal oxides are not directly connected to their hydrogenolytic power, but redox properties seem to play a more important role.19... 

The chemistry of metal oxides can be understood only when their crystal structure is understood. Knowledge of the geometric structure is thus a prerequisite to understanding the properties of metal oxides. The bulk structure of polycrystalline solids can usually be determined by x-ray... 

As discussed in the previous section, metal oxides have both acidic and basic properties. The acid-base properties of metal oxides have led to many interesting catalytic reactions. Catalytic reactions such as H2-D2 exchange, hydrogenation, isomerization, dehydrogenation, dehydrohalo-genation, and benzylation can be considered as examples of acid-base catalysis reactions.31-36 These reactions will be briefly discussed in the following section. The remarkable properties of MgO as a catalyst have been well documented in the literature and we shall discuss some of these unique catalytic properties. 

Describe the acid-base properties of metal oxides. 

Ryan M. Richards was raised near Flint, Michigan. In 1994, he completed both B.A. in chemistry and B.S. in forensic science at Michigan State University. He then spent 2 years as an M.S. student at Central Michigan University working on organometallic chemistry with Professor Bob Howell. He was awarded a Ph D. in 2000 for investigating the properties of metal oxide nanoparticles in the laboratory of Professor Kenneth Klabunde at Kansas State University. In 1999, he was an invited scientist at the Boreskov Institute of Catalysis in Novosibirsk,... 

TABLE 9.1 Various Properties of Metal Oxides and Nitrides... 

Liu, C., and Huang, P. M. (2001). The influence of catechol humification on surface properties of metal oxides. In Humic Substances Structure, Models and Functions, Ghabbour, E. A. and Davies, G, eds., Royal Society of Chemistry, Cambridge, UK, pp. 253-270. 

---