caa a22 4500 475843371 CHVBK 20180406123907.0 cr unu---uuuuu 170329e20000401xx s 000 0 eng 10.1023/A:1027210806104 doi (NATIONALLICENCE)springer-10.1023/A:1027210806104 Structural aspects of chemisorption at Cu(110) revealed at the atomic level [Elektronische Daten] [A.F. Carley, P.R. Davies, R.V. Jones, K.R. Harikumar, G.U. Kulkarni, M.W. Roberts] We illustrate the impact that scanning tunnelling microscopy (STM) has made on our understanding of chemisorption and catalysis at metal surfaces at the atomic level by considering four examples where information from surface sensitive techniques was also available. The advantages of STM and the limitations of some of the other experimental methods are discussed. (1) Through a combination of STM and X-ray photoelectron spectroscopy (XPS) we have established that a number of distinct oxygen chemisorbed states can exist at a Cu(110) surface. These are metastable and temperature dependent. Furthermore, the presence of chemisorbed sulphur is shown to promote a specific oxygen state - isolated oxygen strings - which are likely to be more chemically reactive than the oxygen overlayer present at Cu(110). In this sense the sulphur is a structural promoter. (2) The oxidation of ammonia under ammonia-rich conditions results in the growth of imide (NH) strings at a Cu(110) surface and this has been followed quantitatively by STM. The reactive surface oxygen state participates in an oxydehydrogenation reaction generating NH-radical species which undergo surface diffusion and result in string growth. (3) Nitric oxide dissociates at Cu(110) to generate a two-phase system of chemisorbed nitrogen and oxygen adatoms. The oxygen is present in a well ordered (2 × 1) structure and the nitrogen in a (3 × 2) structure. The limitations of an earlier LEED study are discussed. (4) Structural aspects of chemisorbed sulphur generated by the dissociative chemisorption of hydrogen sulphide and methyl mercaptan are discussed. In the latter case carbon-sulphur bond cleavage results in the formation of a sulphide overlayer at 450 K with complete removal of carbon as desorbed hydrocarbons. Various sulphur structures have been delineated over a wide temperature range. Kluwer Academic Publishers, 2000 STM nationallicence oxygen nationallicence ammonia nationallicence hydrogen sulphide nationallicence nitric oxide nationallicence methyl mercaptan nationallicence copper nationallicence Carley A.F. Department of Chemistry, Cardiff University, PO Box 912, Cardiff CF10 3TB, UK aut Davies P.R. Department of Chemistry, Cardiff University, PO Box 912, Cardiff CF10 3TB, UK aut Jones R.V. Department of Chemistry, Cardiff University, PO Box 912, Cardiff CF10 3TB, UK aut Harikumar K.R. Department of Chemistry, Cardiff University, PO Box 912, Cardiff CF10 3TB, UK aut Kulkarni G.U. Department of Chemistry, Cardiff University, PO Box 912, Cardiff CF10 3TB, UK aut Roberts M.W. Department of Chemistry, Cardiff University, PO Box 912, Cardiff CF10 3TB, UK aut Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 11-12/1-4(2000-04-01), 229-306 1022-5528 11-12:1-4<229 2000 11-12 11244 https://doi.org/10.1023/A:1027210806104 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1027210806104 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Carley A.F. Department of Chemistry, Cardiff University, PO Box 912, Cardiff CF10 3TB, UK aut NATIONALLICENCE 700 1- Davies P.R. Department of Chemistry, Cardiff University, PO Box 912, Cardiff CF10 3TB, UK aut NATIONALLICENCE 700 1- Jones R.V. Department of Chemistry, Cardiff University, PO Box 912, Cardiff CF10 3TB, UK aut NATIONALLICENCE 700 1- Harikumar K.R. Department of Chemistry, Cardiff University, PO Box 912, Cardiff CF10 3TB, UK aut NATIONALLICENCE 700 1- Kulkarni G.U. Department of Chemistry, Cardiff University, PO Box 912, Cardiff CF10 3TB, UK aut NATIONALLICENCE 700 1- Roberts M.W. Department of Chemistry, Cardiff University, PO Box 912, Cardiff CF10 3TB, UK aut NATIONALLICENCE 773 0- Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 11-12/1-4(2000-04-01), 229-306 1022-5528 11-12:1-4<229 2000 11-12 11244 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer