Effect of surface acoustic waves on activity in heterogeneous catalysis

Gruyters, M.; Mitrelias, T.; King, David A.

doi:10.1007/bf01538189

Cited by 19 publications

(2 citation statements)

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“…In most "sonochemistry", sound acts by heating and compressing the system 37 . This is not the case in the surface science experiments mentioned above, which have ruled out heating effects [34][35][36] . The effect of sound on chemical reaction is very hard to explain by conventional arguments: sound frequency is very low and excites phonons of long wavelength with very low energy.…”

Section: Discussionmentioning

confidence: 99%

“…Inoue et al [29][30][31][32] have demonstrated that sound affects the yield of catalytic reactions. Prompted by these experiments King et al 34,35 have performed careful ultrahigh vacuum experiments in which the interplay between sound and chemisorbed molecules can be studied in a clean and controlled environment. They found that exposing a Pt surface to sound can change the rate of CO oxidation.…”

Section: Discussionmentioning

confidence: 99%

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The effect of strain on the adsorption of CO on Pd(100)

Metiu

2000

The Journal of Chemical Physics

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We study how the binding energy, the vibrational frequencies and the adsorption isotherm of CO on Pd(100) are modified when the solid is subject to uniform strain. The parameters controlling the thermodynamics of adsorption (the adsorption energy, the vibrational frequencies of the adsorbed molecules and the interaction energy between the molecules) have been calculated by using density functional theory. These parameters are then used in a grand canonical Monte Carlo simulation that determines the CO coverage when the surface is in thermodynamic equilibrium with a CO gas, at a specified pressure and temperature. We find that this is substantially affected by the strain. Our results, along with those obtained by others, suggest that the development of "elastochemistry", a study of the change in the chemical properties of a surface when subjected to strain, will lead to interesting and measurable results. It also suggests that differences in chemical activity between clusters on a support and clusters in gas phase may be partly due to the strain induced when a cluster is placed on the support.Comment: 8 pages, 5 figures, Submitted to J. Chem. Phy

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Section: Discussionmentioning

confidence: 99%