Partial charge transfer and adsorption at metal electrodes. The underpotential deposition of Hg(I), Tl(I), Bi(III) and Cu(II) on polycrystalline gold electrodes
✍ Scribed by G. Salié; K. Bartels
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 854 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0013-4686
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✦ Synopsis
Abet
-The absorption of H&, Tl+, B13+ and Cuz+ at polycrystalbne gold electrodes from aqueous solutions IS mvestigated by potentrostatic step expenme-nts at rotatmg rmgdBk electrodes The macroscoptc partml charge transfer coefiiuent 1 u determmed from the uutud part of the current transients at rmg and tik which 1s diffuszon controlled for low reactant concentrations The measured I are 047 (Hg$+), 061 (Tl'), 073 (B?) and 092 (Cuz+) f 003 The potential dependence. of the measured I IS small and could m&a& that the mam part of 1 IS caused by microscopic charge transfer A DdTusron controlled formation of the mam part of the partmlly charged adsorbate pomts to strong repulsive forces between the adsorbed particles With all of the mvesfigated systems, a second type of deposit has been detected which conasts of completely &charged metal Key words partial charge transfer, underpotential deposttton, adsorption, rrde, gold 1. INTRODUCl'ION