Read e-book online Advances in Catalysis, Vol. 26 PDF

By D. D. Eley (ed.), Herman Pines (ed.), Paul B. Weisz (ed.)

ISBN-10: 0120078260

ISBN-13: 9780120078264

Considering 1948, this serial has sought to fill the distance among the papers and the textbooks that educate the varied components of catalysis study. This quantity contains articles at the purposes of adsorption microcalorimetry and natural syntheses utilizing aluminosilicates.

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Extra resources for Advances in Catalysis, Vol. 26

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The step height is obtained from the variation of the intensity maximum of the doublet diffraction beam features with electron energy. The detailed analysis of the surface structure based on these diffraction patterns is described elsewhere (13). The terrace width does not have to be uniform to obtain satisfactory diffraction patterns. Houston and Park (14) in a theoretical study have shown that although there may be a great deal of variation in the step width about an average value, one still obtains a diffraction pattern of satisfactory quality.

It has been found, however, that for light elements (with the exception of hydrogen and helium which cannot be detected since these elements have no inner electronic shells) the probability of Auger transitions is much greater than that of X-ray fluorescence. In recent years, AES (2),ultraviolet photoelectron spectroscopy (20),and X-ray photoelectron spectroscopy (2Za) have come to play prominent roles in studies analyzing the composition and bonding at surfaces. These techniques can conveniently be used to determine nondestructively the composition of the surface and changes of the surface composition under a variety of experimental conditions.

It appears that the stronger metal-carbon interaction on iridium surfaces imposes the periodicity on the carbon atoms in the overlayer, while the structure of the graphite overlayer on the Pt(ll1) face is independent of the substrate periodicity and rotational symmetry. Ordering of the dehydrogenated carbonaceous residue on the stepped iridium surface is absent when the surface is heated to above 1100 K. Atomic steps of(100)orientation appear to prevent the formation of ordered domains that are predominant on the Ir(l11) crystal face.

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Advances in Catalysis, Vol. 26 by D. D. Eley (ed.), Herman Pines (ed.), Paul B. Weisz (ed.)

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