Weakly chemisorbed CO layer on Rh(100) as detected by reverse flash and field 
ion appearance energy measurements

Medvedev, V. K.; Kulik, V. S.; Chernyi, V. I.; Suchorski, Yu

doi:10.1016/S0042-207X(96)00286-2

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Weakly chemisorbed CO layer on Rh(100) as detected by reverse flash and field ion appearance energy measurements

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Suchorski, Yu
Fritz Haber Institute, Max Planck Society;

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Citation

Medvedev, V. K., Kulik, V. S., Chernyi, V. I., & Suchorski, Y. (1997). Weakly chemisorbed CO layer on Rh(100) as detected by reverse flash and field ion appearance energy measurements. Vacuum, 48(3-4), 341-345. doi:10.1016/S0042-207X(96)00286-2.

Cite as: https://hdl.handle.net/21.11116/0000-0008-C78C-A

Abstract

Using the reverse flash (RF) method, the sticking coefficient and binding energy of CO molecules on Rh(100) are obtained for CO surface densities up to 1.2×10¹⁵ cm⁻². The presence of weakly bound CO molecules with a binding energy of 0.34 eV is detected at n>1.0×10¹⁵ cm⁻². Mass-to-charge-resolved retarding potential analysis of CO⁺ emitted from Rh(100) is performed and absolute values of CO⁺ field ion appearance energy obtained. By applying a thermionic cycle field-dependent values of the binding energy of CORh(100) at high coverages are obtained. A comparison of field-free (RF) results and field ion appearance energy spectroscopy (FIAES) data reveals the weakly bound (field-stabilized) CO layer as the origin of CO⁺ field ions emitted from Rh(100) for field ion imaging.