โ Scribed by S. Schuldiner; T.B. Warner
No coin nor oath required. For personal study only.
Hydrogen formed by cathodic polarization of a bright platinum electrode in CO-saturated I M H,SO, is shown to remain associated with the electrode for relatively long periods of time . Such hydrogen causes unusual open-circuit potential behaviour after anodic pulses, and can give charac teristic hydrogen regions in anodic charging curves . Potential behaviour, in itself, may not be a sufficient criterion for the absence of hydrogen at the electrode interface .
Resume-H, forme par polarisation cathodique sur electrode Pt poli dans H,SO 4 . 1 M saturee de CO, apparait demeurant associe a 1'electrode durant des periodes relativement longues . II provoque, apres pulsions anodiques, un comportement inhabituel de la tension en circuit ouvert et pent manifester sur Its courbes de charge anodique des regions caracteristiques de l'hydrogene . Le comportement des tensions n'apporte pas par lui-meme un critere sutllsant de ]'absence d'H, a l'interface de l'electrode .
Zusanln enfassung-Es wird gezeigt, dass Wasserstoff, welcher an blanken Platinelektroden in COgesattigter 1 M H,SO, dumb kathodische Polarisation gebildet wurde, fur relativ lange Zeiten an der Elektrode verbleibt . Dieser Wasserstoff ergibt unerwartetes Verhalten der unbelasteten Potentiale nach anodischen Pulsen and kann charakteristische Wasserstoffgebiete in anodischen Ladekurven bewirken . Das Potentialverhalten allein jedoch ist unter Umstanden
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The early stages of Ag electrodeposition on columnar structured Pt electrodes was investigated in acid solutions covering the underpotential deposition (upd) and overpotential deposition (opd) ranges. Results show a remarkable dependence of the Ag growth mode on the electrode roughness and potential