Water production reaction on Rh(110) (Articolo in rivista)

  • Water production reaction on Rh(110) (Articolo in rivista) (literal)
  • 2005-01-01T00:00:00+01:00 (literal)
  • 10.1021/ja0524301 (literal)
Alternative label
  • Africh, C (1,2); Lin, HP (3); Corso, M (1,2); Esch, F (2); Rosei, R (1,2); Hofer, WA (3); Comelli, G (1,2) (2005)
    Water production reaction on Rh(110)
    in Journal of the American Chemical Society (Print); American Chemical Society, Washington (Stati Uniti d'America)
  • Africh, C (1,2); Lin, HP (3); Corso, M (1,2); Esch, F (2); Rosei, R (1,2); Hofer, WA (3); Comelli, G (1,2) (literal)
Pagina inizio
  • 11454 (literal)
Pagina fine
  • 11459 (literal)
  • 127 (literal)
  • 32 (literal)
  • Scopus (literal)
  • ISI Web of Science (WOS) (literal)
  • (1) Univ Trieste, Dept Phys and Ctr Excellence Nanostruct Mat, I-34127 Trieste, Italy; (2) INFM, TASC Lab, I-34012 Basovizza, Trieste, Italy; (3) Univ Liverpool, Dept Chem, Surface Res Ctr, Liverpool L69 3BX, Merseyside, England (literal)
  • Water production reaction on Rh(110) (literal)
  • By means of scanning tunneling microscopy and density functional theory calculations, we studied the water formation reaction on the Rh(110) surface when exposing the (2 x 1)p2mg-O structure to molecular hydrogen, characterizing each of the structures that form on the surface during the reaction. First the reaction propagates on the surface as a wave front, removing half of the initial oxygen atoms. The remaining 0.5 monolayers of 0 atoms rearrange in pairs, forming a c(2 x 4) structure. Second, as the reaction proceeds, areas of an intermediate structure with c(2 x 2) symmetry appear and grow at the expense of the c(2 x 4) phase, involving all the oxygen atoms present on the surface. Afterward, the c(2 x 2) islands shrink, indicating that complete hydrogenation occurs at their edges, leaving behind a clean rhodium substrate. Two possible models for the c(2 x 2) structure, where not only the arrangement but also the chemical identity is different, are given. The first one is a mixed H + O structure, while the second one resembles the half-dissociated water layer already proposed on other metal surfaces. In both models, the high local oxygen coverage is achieved by the formation of a hexagonal network of hydrogen bonds. (literal)
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