Halide electroadsorption on single crystal surfaces

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The structure and phase behavior of halides have been investigated on single crystals of Ag and Au using synchrotron x-ray scattering techniques. The adlayer coverages are potential dependent. For all halides studied the authors found that with increasing potential, at a critical potential, a disordered adlayer transforms into an ordered structure. Often these ordered phases are incommensurate and exhibit potential-dependent lateral separations (electrocompression). The authors have analyzed the electrocompression in terms of a model which includes lateral interactions and partial charge. A continuous compression is not observed for Br on Ag(100). Rather, they find that the adsorption is site-specific (lattice ... continued below

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13 p.

Creation Information

Ocko, B.M. & Wandlowski, T. July 1, 1997.

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  • Ocko, B.M. Brookhaven National Lab., Upton, NY (United States). Dept. of Physics
  • Wandlowski, T. Univ. of Ulm (Germany). Dept. of Electrochemistry

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Description

The structure and phase behavior of halides have been investigated on single crystals of Ag and Au using synchrotron x-ray scattering techniques. The adlayer coverages are potential dependent. For all halides studied the authors found that with increasing potential, at a critical potential, a disordered adlayer transforms into an ordered structure. Often these ordered phases are incommensurate and exhibit potential-dependent lateral separations (electrocompression). The authors have analyzed the electrocompression in terms of a model which includes lateral interactions and partial charge. A continuous compression is not observed for Br on Ag(100). Rather, they find that the adsorption is site-specific (lattice gas) in both the ordered and disordered phases. The coverage increases with increasing potential and at a critical potential the disordered phase transforms to a well-ordered commensurate structure.

Physical Description

13 p.

Notes

OSTI as DE97006752

Source

  • 1996 Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 2-6 Dec 1996

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  • Other: DE97006752
  • Report No.: BNL--64433
  • Report No.: CONF-961202--114
  • Grant Number: AC02-76CH00016
  • Office of Scientific & Technical Information Report Number: 495691
  • Archival Resource Key: ark:/67531/metadc683809

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  • July 1, 1997

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  • July 25, 2015, 2:21 a.m.

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  • Nov. 10, 2015, 12:29 p.m.

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Ocko, B.M. & Wandlowski, T. Halide electroadsorption on single crystal surfaces, article, July 1, 1997; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc683809/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.