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Chemisorption
About: Chemisorption is a research topic. Over the lifetime, 16298 publications have been published within this topic receiving 554989 citations.
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TL;DR: In this paper, the authors investigated the chemisorption of CO on the (111) surface of Ir at room temperature and below using both low-energy electron diffraction (LEED) and thermal desorption mass spectrometry.
Abstract: The chemisorption of CO on the (111) surface of Ir at room temperature and below has been investigated using both low‐energy electron diffraction (LEED) and thermal desorption mass spectrometry. The CO is adsorbed rapidly onto the (111) Ir forming a well‐ordered (√3×√3) R30° overlayer structure after an exposure of approximately 2 to 3 Langmuirs. For larger exposures the overlayer compresses continuously as additional CO is adsorbed until a (2√3×2√3) R30° structure is formed. The surface coverage of CO corresponding to the (√3×√3) R30° structure is one‐third monolayer, and mass spectrometry has shown that the surface coverage corresponding to the (2√3×2√3) R30° structure is 7/12 monolayer, where monolayer coverage is based on the number of surface Ir atoms. The isosteric heat of adsorption at one‐third monolayer coverage was measured by monitoring the intensity of the overlayer LEED beams as a function of CO pressure and surface temperature, and it was found to be 35±1 kcal/mole. Thermal desorption reveal...
129 citations
TL;DR: In this article, the adsorption energies of atomic hydrogen and of CO were determined as a microscopic probe of the reactivity of thin pseudomorphic Pd overlayers on Au(111) and (100) single crystal surfaces.
129 citations
TL;DR: In this paper, the interaction of oxygen with a single crystal surface was investigated using high-resolution electron energy loss spectroscopy, at gas exposures ranging from 10 to 10 9 L and at temperatures between 298 and 523 K. Three distinct stages of chemisorption/oxidation were distinguished by their vibrational spectra: (1) chemisorbbed oxygen atoms either in or below the outermost plane of copper atoms, (2) Cu 2 O island formation most likely at defect sites on the surface, and (3) the growth of a bulk cuprous oxide thin
129 citations
TL;DR: In this paper, total energy calculations using density functional theory with gradient corrections for CO chemisorption on an extended Pd{110} slab yield good agreement with experimental adsorption energies.
129 citations
129 citations