Read e-book online Chemical Physics of Solid Surfaces and Heterogeneous PDF

By D. A. King

ISBN-10: 0444419713

ISBN-13: 9780444419712

ISBN-10: 0444507450

ISBN-13: 9780444507457

The e-book is a multi-author survey (in 15 chapters) of the present country of data and up to date advancements in our figuring out of oxide surfaces. the writer checklist comprises lots of the stated international specialists during this box. the fabric lined contains primary thought and experimental stories of the geometrical, vibrational and digital constitution of such surfaces, yet with a different emphasis at the chemical homes and linked reactivity. the main target is on steel oxides yet insurance extends from 'simple' rocksalt fabrics corresponding to MgO via to advanced transition steel oxides with varied valencies.

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Extra info for Chemical Physics of Solid Surfaces and Heterogeneous Catalysis

Sample text

9) to additional CO; this is shown in Fig. 10. While the spectral changes are smaller here, the difference spectra in Fig. 10(b) show that CO interacts for all exposures used; there is no reaction threshold as there was for the stoichiometric surface. When the surface in Fig. 10, after exposure to 10^^ L CO, is heated to remove the adsorbed species, the changes are similar to those in Fig. 9, with the intensity of the V 3d band increasing as CO2 is desorbed from the surface, removing still more lattice oxygen.

Chapters 6 - 9 here treat various aspects of the growth of metal oxides on metal substrates. Chapters 8 and 9 consider adsorption and reaction on some of those films. The last area is oxide-oxide interfaces. While metal oxide films have been deposited commercially on oxide substrates for many years, and many such systems are of technological importance, the surface science of oxide-oxide interfaces is in its infancy [39,40]. Some oxide-on-oxide growth is discussed in Chaps. 6, 7 and 9. However, its future importance warrants some additional comments on the field.

3. Model of the rocksalt (100) surface. Large circles are O anions, small circles are metal cations. A [010] step to another (100) terrace is shown, as are both missing anion and missing cation point defects. ligands; however, the stoichiometry of the crystal is maintained along the step, and the step-edge ions can thus retain the same valence states that they have on the terraces (nearly Mg^^ and O^" in this case). This is indeed the step direction that is observed on MgO (100) surfaces. Another example of steps on oxide surfaces is shown in Fig.

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Chemical Physics of Solid Surfaces and Heterogeneous Catalysis by D. A. King

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