Coadsorption of K and O on Ni(100) by HREEL investigation

• Published in: Surface science Vol. 415; no. 1; pp. 62 - 69
• Main Authors: Cupolillo, A, Chiarello, G, Scalese, S, Caputi, L.S, Papagno, L, Colavita, E
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 30.09.1998; Amsterdam Elsevier Science; New York, NY
• Subjects: Adsorption and desorption kinetics; evaporation and condensation; Alkali metals; Chemisorption; Condensed matter: structure, mechanical and thermal properties; Electron energy loss spectroscopy (EELS); Exact sciences and technology; Oxidation; Physics; Solid-fluid interfaces; Surface chemical reaction; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Vibrations of adsorbed molecules; Chemisorption; Surface chemical reaction; Oxidation; Vibrations of adsorbed molecules; Alkali metals; Electron energy loss spectroscopy (EELS); Gas solid adsorption; Oxygen; EEL spectroscopy; Transition elements; Coadsorption; Gas solid interface; Nickel; Experimental study; Potassium; Preadsorption
• ISSN: 0039-6028; 1879-2758
• DOI: 10.1016/S0039-6028(98)00468-3

The coadsorption of oxygen on a potassium precovered Ni(100) surface was investigated by the high resolution electron energy loss technique. The interaction between the coadsorbate atoms takes place only for a K coverage of 0.38 ML corresponding to the completion of the first K layer. At this K coverage, an intense vibrational feature, at 180 meV, is a consequence of the oscillating motion of the atoms of the Ni–K–O clusters, particularly, of the component vibrating along the surface plane.