scholarly journals Bond Energies of Adsorbed Intermediates to Metal Surfaces: Correlation with Hydrogen–Ligand and Hydrogen–Surface Bond Energies and Electronegativities

2018 ◽  
Vol 57 (51) ◽  
pp. 16877-16881 ◽  
Author(s):  
Spencer J. Carey ◽  
Wei Zhao ◽  
Charles T. Campbell
2020 ◽  
Vol 124 (15) ◽  
pp. 8257-8268 ◽  
Author(s):  
Stefan R. Kachel ◽  
Benedikt P. Klein ◽  
Juliana M. Morbec ◽  
Maik Schöniger ◽  
Mark Hutter ◽  
...  

2014 ◽  
Vol 136 (11) ◽  
pp. 4137-4140 ◽  
Author(s):  
Eric M. Karp ◽  
Trent L. Silbaugh ◽  
Charles T. Campbell

2015 ◽  
Vol 640 ◽  
pp. 36-44 ◽  
Author(s):  
Jess Wellendorff ◽  
Trent L. Silbaugh ◽  
Delfina Garcia-Pintos ◽  
Jens K. Nørskov ◽  
Thomas Bligaard ◽  
...  

1979 ◽  
Vol 34 (1) ◽  
pp. 46-54 ◽  
Author(s):  
E. Hummel ◽  
M. Domke ◽  
J. H. Block

Abstract The onset, eδ0, in the energy distribution of field desorbed silver ions (from Ag deposit on a W-tip) has been measured at T > 400 K. With increasing field strength (0.5 < 1010 V/m < F < 1·1010 V/m) or with decreasing temperature (800 K > T > 500 K) eδ0 increases up to 1.5 eV. For a comparison with the eδ0-values, activation energies, Q, for field desorption have been determined from Arrhenius plots (0.5 eV < Q < 2 eV). Two different kinetic regimes (desorption and diffusion) were identified. For field desorption, the sum eδ0 + Q is constant, irrespective of F-values.In the frame of "image hump" or "charge exchange" models, field dependent activation barriers are discussed. Temperature dependencies are related to (i) the Fermi distribution of the emitter, (ii) the distribution of F and (iii) the distribution of surface bond energies. Results are consistently explained in a three-dimensional model with directionally distinguished desorption steps.


Author(s):  
M. L. Knotek

Modern surface analysis is based largely upon the use of ionizing radiation to probe the electronic and atomic structure of the surfaces physical and chemical makeup. In many of these studies the ionizing radiation used as the primary probe is found to induce changes in the structure and makeup of the surface, especially when electrons are employed. A number of techniques employ the phenomenon of radiation induced desorption as a means of probing the nature of the surface bond. These include Electron- and Photon-Stimulated Desorption (ESD and PSD) which measure desorbed ionic and neutral species as they leave the surface after the surface has been excited by some incident ionizing particle. There has recently been a great deal of activity in determining the relationship between the nature of chemical bonding and its susceptibility to radiation damage.


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