The electronic structure and reactivity of the oxygen-modified Mo2C(0 001) surface

• Published in: Applied surface science Vol. 254; no. 23; pp. 7622 - 7625
• Main Authors: EDAMOTO, K, NAKADAI, Y, ABE, Y, OZAWA, K
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Amsterdam Elsevier 30-09-2008
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Electron and ion emission by liquids and solids; impact phenomena; Exact sciences and technology; Photoemission and photoelectron spectra; Physics; Solid surfaces and solid-solid interfaces; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Water; Chemisorption; Oxygen; Inorganic compounds; Angular resolution; Low index single crystal surfaces; Transition element compounds; Photoemission spectroscopy; Photoelectron spectroscopy; Monocrystals; Electronic structure; Fermi level; Molybdenum carbide; Carbides
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2008.01.125

Oxygen adsorption on Mo2C(0 0 0 1) has been investigated with angle-resolved photoemission spectroscopy (ARPES). When the surface is reacted with O2, the O 2p-induced states are formed at 4.1 and 5.3 eV at the point. The emissions around the Fermi level are also intensified by oxygen adsorption, which is due to the formation of a partially filled state. It is found that the reactivity of the surface toward H2O adsorption is much enhanced by pre-adsorption of oxygen. The reactivity is found to be maximized at thetaO 0.2.