Download e-book for iPad: Impact of Surface Science on Catalysis by Bruce C. Gates, Helmut Knoezinger

By Bruce C. Gates, Helmut Knoezinger

ISBN-10: 0120078457

ISBN-13: 9780120078455

Content material: Dynamics of reactions at surfaces / Gerhard Ertl -- Theoretical floor technology and catalysis, calculations and ideas / B. Hammer and J.K. Nørskov -- Scanning tunneling microscopy stories of catalytic reactions / Joost Wintterlin -- Adsorption energetics and bonding from femtomole calorimetry and from first ideas idea / Qingfeng Ge, Rickmer Kose, and David A. King -- lively websites on oxides: from unmarried crystals to catalysts / Hicham Idriss and Mark A. Barteau -- Catalysis and floor technological know-how: what can we examine from experiences of oxide-supported cluster version structures? / H.-J. Freund, M. Bäumer, and H. Kuhlenbeck -- Sum frequency new release: floor vibrational spectroscopy experiences of catalytic reactions on steel single-crystal surfaces / Gabor A. Somorjai and Keith R. McCrea

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It is believed that surface diffusion of adsorbates belongs to the most complex phenomena of dynamics in surface reactions, for which proper consideration of the relevant length scale is of decisive importance. Another aspect concerns modification of the dissociation probability of an adsorbed molecule resulting from interaction with other adsorbates. The well-known promoter effects of adsorbed alkali metal atoms in catalysis fall into this category, as discussed in detail elsewhere (160). However, such an effect may be exerted even by the same kind of adsorbate.

The definition of a (microscopic) single-particle diffusion coefficient then becomes meaningless, all the more so if one considers that ubiquitous defects will act as intermediate traps for particles migrating over longer distances. It is believed that surface diffusion of adsorbates belongs to the most complex phenomena of dynamics in surface reactions, for which proper consideration of the relevant length scale is of decisive importance. Another aspect concerns modification of the dissociation probability of an adsorbed molecule resulting from interaction with other adsorbates.

After dissociation, these atoms were found to be one to three lattice constants apart from each other, just as in the case of thermal dissociation, as discussed previously in connection with the effect of hot adatoms (2). The nonlinear dependence of the dissociation rate on the current was rationalized in the framework 40 GERHARD ERTL of a general model for dissociation induced by intramolecular vibrational excitation via inelastic electron tunneling. In a next step, even the rotational motion of single adsorbed O2 molecules was induced by the STM tip and imaged (141).

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Impact of Surface Science on Catalysis by Bruce C. Gates, Helmut Knoezinger


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