POTENTIOSTATIC CHARGE DISPLACEMENT BY EXCHANGING ADSORBED SPECIES ON PT(111) ELECTRODES - ACIDIC ELECTROLYTES WITH SPECIFIC ANION ADSORPTION

Authors
ORTS JM GOMEZ R FELIU JM ALDAZ A CLAVILIER J
Citation
Jm. Orts et al., POTENTIOSTATIC CHARGE DISPLACEMENT BY EXCHANGING ADSORBED SPECIES ON PT(111) ELECTRODES - ACIDIC ELECTROLYTES WITH SPECIFIC ANION ADSORPTION, Electrochimica acta, 39(11-12), 1994, pp. 1519-1524
Citations number
16
Categorie Soggetti
Electrochemistry
Journal title
Electrochimica acta → ACNP
ISSN journal
00134686
Volume
39
Issue
11-12
Year of publication
1994
Pages
1519 - 1524
Database
ISI
SICI code
0013-4686(1994)39:11-12<1519:PCDBEA>2.0.ZU;2-G
Abstract
The voltammetric contribution of some specifically adsorbed anions (ac etate, oxalate, chloride and bromide) is revised for the case of Pt(11 1) electrodes by means of experiments of displacement by CO in acidic medium. It is found that the usual states correspond to the reversible adsorption/desorption of hydrogen whereas the so-called unusual state s would correspond to the adsorption/desorption of anions. This means that the maximum coverage of hydrogen adatoms prior to hydrogen evolut ion is around two-thirds of a complete monolayer of Pt(111). From the potential dependence of the voltammetric profiles the electrosorption valency of the different anionic species is calculated.