期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 649, 期 1-2, 页码 136-141出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2010.02.016
关键词
Sulfate; Adsorption; Adsorbate-adsorbate interactions; Surface dynamics; Scanning tunneling microscopy
资金
- Deutsche Forschungsgemeinschaft [MA 1618/14]
- Alexander-von-Humboldt foundation
In situ video-rate scanning tunneling microscopy studies of the anion adlayer on Au(1 1 1) electrodes in sulfate containing electrolytes are presented that provide direct data on the structure and dynamics of the potential induced phase transition between the disordered adlayer and the ordered (root 3 x root 7) structure as well as of local transient structures in the disordered adsorbate phase Specifically strong correlations between adsorbates spaced at distances of root 3 Au surface lattice constants along the [1 1 (2) over bar] directions of the metal substrate are observed supporting the formation of a 1D (bi)sulfate network via hydrogen-bonding along this direction This network structure is in accordance with the rather slow adsorbate dynamics with residence times in the range of milliseconds or larger (C) 2010 Elsevier B V All rights reserved
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