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Hydroxide Adsorption on Ag(110) Electrodes: An in Situ Second Harmonic Generation and ex Situ Electron Diffraction Study Full article

Общее Language: Английский, Genre: Full article,
Status: Published, Source type: Original
Journal The Journal of Physical Chemistry B
ISSN: 1520-6106 , E-ISSN: 1520-5207
Output data Year: 2004, Volume: 108, Number: 48, Pages: 18640-18649 Pages count : 10 DOI: 10.1021/jp0481198
Authors Horswell Sarah L. 1 , Pinheiro Alexei L. N. 1 , Savinova Elena R. 2,3 , Pettinger Bruno 1 , Zei Mau-Scheng 4 , Ertl Gerhard 1
Affiliations
1 Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
2 Technische Universitaet Muenchen, Physik-Department E19, James-Franck Str. 1, D-85748 Garching, Germany
3 Boreskov Institute of Catalysis of the Siberian Branch of the Russian Academy of Sciences, Prospekt Akademika Lavrentieva, 5, Novosibirsk 630090, Russian Federation
4 Department of Physics, National Central University, Jungli, Taiwan 32054

Abstract: The adsorption of hydroxide on the Ag(110) surface has been studied with cyclic voltammetry, in situ second harmonic generation (SHG), and ex situ low energy electron diffraction (LEED) and reflection high energy electron diffraction (RHEED). OH- is found to be adsorbed on the Ag(110) surface at potentials negative of the potential of zero charge, forming small antiphase domains of c(2 × 6) symmetry. Further adsorption leads to longer-range order and the removal of antiphase domain boundaries and is associated with a current peak in the cyclic voltammogram (CV). Concurrently, a change in symmetry patterns is observed in SHG. A c(2 × 2) pattern gradually replaces the c(2 × 6) pattern as the potential, and the OH - coverage, is increased. At the beginning of the second current wave, another symmetry change takes place which is accompanied by a sharp change in the LEED pattern from a c(2 × 2) pattern to a (1 × 1) pattern with strong background, indicating a disordered adlayer. However, RHEED results show that some patches of c(2 × 2) structure remain on the surface. The correlation between SHG and diffraction measurements and comparison of the information obtained from each technique allow us to develop a detailed picture of the structures and electronic effects at the Ag(110) |alkaline electrolyte interface.
Cite: Horswell S.L. , Pinheiro A.L.N. , Savinova E.R. , Pettinger B. , Zei M-S. , Ertl G.
Hydroxide Adsorption on Ag(110) Electrodes: An in Situ Second Harmonic Generation and ex Situ Electron Diffraction Study
The Journal of Physical Chemistry B. 2004. V.108. N48. P.18640-18649. DOI: 10.1021/jp0481198 publication_identifier_short.wos_identifier_type publication_identifier_short.scopus_identifier_type publication_identifier_short.rinz_identifier_type
Dates:
Submitted: Apr 30, 2004
Accepted: Aug 9, 2004
Published print: Dec 1, 2004
Identifiers:
publication_identifier.wos_identifier_type WOS:000225417200035
publication_identifier.scopus_identifier_type 2-s2.0-10644264442
publication_identifier.rinz_identifier_type 13458687
publication_identifier.accession_number_identifier_type 2004:924933
publication_identifier.chemical_accession_number_identifier_type 142:64100
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