Transition Metal Oxides by Harold H. Kung

By Harold H. Kung

During this ebook the writer offers an up to date precis of current info at the constitution, digital houses, chemistry and catalytic houses of transition steel oxides. the topics coated within the booklet might be divided into 3 sections. the 1st (chapters 1 to three) covers the structural, actual, magnetic, and digital houses of transition steel oxides. even if the emphasis is on floor homes, appropriate bulk homes also are mentioned. the second one part (chapters four to 7) covers floor chemical houses. It contains issues that describe the significance of floor coordinative unsaturation in adsorption, the formation of floor acidity and the function of acidity in identifying floor chemical houses, the character and reactivities of adsorbed oxygen, and the skin chemistry reduce oxides. The 3rd part (chapters eight to fourteen) is at the catalytic houses. quite a few catalytic reactions together with decomposition, hydrogenation, isomerization, metathesis, selective oxidation, and reactions concerning carbon oxides are mentioned. Emphasis is put extra on response mechanisms and the position of catalysts than on kinetics and techniques.

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Surface atom relaxation is expected to be different for the oxygen and for the Zn atoms, assuming that ZnO is a covalent compound. For ionic compounds, relaxation of a surface ion is determined by three factors [ l l ] : changes in h e ionic size because of reduced surface charge transfer resulting from a reduced Madelung potential at the surface, imbalance of the ionic forces because of the termination of the lattice, and the residual influence of covalent bonding. The extent and the direction of relaxation depend on the relative contributions of these factors.

B. Anderson, Chern. Phys. , 72, 514 (1980). S. Bagus, and U. Wahlgren, Mol. , 33. 641 (1977). o) C. Satoko, and M. Tsukada, IMS Ann. Review, 1979, p. 33; M. Tsukada, H. Adachi, and C. Satoko, Prog. , 14, 113 (1982). p) M. Tsukada, C. Satoko. and H. Adachi, J. Phys. Japan, 48. 200 (1980). reduction by X-ray, XPS data could be recorded for Cr ion and reduced Cr atom from the same sample. Presumably, since both the Cr ion and the Cr atom are embedded in the same solid matrix, their extra-atomic relaxation should be the same.

Medema, and P. Gellings, &it. Physik. Chem. Neue Folge, 111, 215 (1978). 16. F. Roozebaum, M. Mittelmeijer-Hazeleger, J. Moulijn, J. Medema, V. de Beer, and P. Gellings, J . Phys. , 84, 2783 (1980). 17. I. Wachs, R. Saleh, S . Chan, and C. Chersich, Appl. , 15, 339 (1985). 18. A. Vijux, and P. Courtine, J . , 23, 93 (1978). 19. G. C. Bond and P. Konig, J . , 77, 309 (1982). 20. Murakami, M. Inomata, K. Mori, T. Ui, K. Suzuki. A. Miyamoto, and T. Hattori, in Preparation of Catalysts III. G. Poncelet, P.

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