Molecular chemisorption at well-defined Pd(111) electrode surfaces: hydroquinone sulfonate studied by UHV-EC-STM

Citation
Je. Soto et al., Molecular chemisorption at well-defined Pd(111) electrode surfaces: hydroquinone sulfonate studied by UHV-EC-STM, J ELEC CHEM, 500(1-2), 2001, pp. 374-378
Citations number
11
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
ISSN journal
1572-6657 → ACNP
Volume
500
Issue
1-2
Year of publication
2001
Pages
374 - 378
Database
ISI
SICI code
Abstract
The chemisorption of 2,5-dihydroxybenzenesulfonate (hydroquinone sulfonate, HQS) from dilute aqueous solutions, onto a well-defined Pd(111) electrode surface has been studied by a combination of Auger electron spectroscopy, h igh-resolution electron energy loss spectroscopy, scanning tunneling micros copy and electrochemistry. The results indicate that HQS is oxidatively che misorbed and exists on the surface as benzoquinone sulfonate (BQS); it is o riented essentially parallel to the surface with a slight tilt due to the b ulky SO3- group. The H+ counter-ions in the ionic adlayer can be exchanged reversibly and quantitatively by K+ or Cs+ ions without changes in the stru cture and coverage of the surface-anchored species. (C) 2001 Elsevier Scien ce B.V. All rights reserved.