Coverage dependent desorption measurements of COCu(001) |
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| Institution: | 1. School of Materials Science and Engineering University of Shanghai for Science and Technology, Shanghai, 200093, China;2. Department of Cardiothoracic Surgery, Shanghai Children''s Medical Center Affiliated to Shanghai Jiaotong University, School of Medicine, Shanghai, 200127, China;1. Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz, Iran;2. Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam;1. School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran;2. Taleghani Hospital Research Development Committee, Shahid Beheshti University of Medical Sciences, Tehran, Iran;3. Taleghani Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran;4. University Medical Center Hamburg- Eppendorf, Hamburg, Germany;1. Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA;2. Institut Lagrange de Paris, Institut d''Astrophysique de Paris, 98 bis boulevard Arago, 75014 Paris, France;1. School of Electrical Engineering and Computer Science, Louisiana State University, Baton Rouge, LA 70803, USA;2. Department of Geology and Geophysics, Louisiana State University, Baton Rouge, LA 70803, USA |
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| Abstract: | We report time-resolved electron energy loss spectroscopy measurements of the coverage-dependent kinetic parameters for the thermal desorption of CO from Cu(001). Large, parallel increases in the activation energy for desorption and desorption prefactor are observed as a function of coverage. The activation energy away from zero coverage differs significantly from the measured isosteric heat of adsorption. The significance of these results is discussed in terms of applicable statistical models. We deduce the existence of an unusual temperature dependence in the adsorbate configurational entropy. |
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