An interrupter technique with computer-assisted calculation of the ohmic potential drop UΩ is described. It allows to measure UΩ while the working electrode is under potentiostatic control. As an additional result the differential double layer capacity CD is calculated, which includes some informations about the state of the working electrode surface. Experiments with the presented interrupter technique show, that just using a Luggin capillary is absolutely insufficient to avoid IR drop, especially in low conductive media: steady state current-potential curves will yield erroneous results of the kinetic parameters of the electrode reactions if the IR drop is not carefully eliminated. The described interrupter technique gives the same results for the ohmic resistance RΩ as eg AC techniques or potential pulse measurements. The value of RΩ measured is always associated with the primary current distribution.

INVESTIGATIONS INTO THE ACTIVE PASSIVE TRANSITION OF 304 STAINLESS-STEEL IN ORGANIC MEDIA CONTAINING WATER AND HYDROGEN-CHLORIDE PART 1. IR DROP MEASUREMENT BY A COMPUTER-ASSISTED INTERRUPTER TECHNIQUE

ELSENER, BERNHARD;
1982-01-01

Abstract

An interrupter technique with computer-assisted calculation of the ohmic potential drop UΩ is described. It allows to measure UΩ while the working electrode is under potentiostatic control. As an additional result the differential double layer capacity CD is calculated, which includes some informations about the state of the working electrode surface. Experiments with the presented interrupter technique show, that just using a Luggin capillary is absolutely insufficient to avoid IR drop, especially in low conductive media: steady state current-potential curves will yield erroneous results of the kinetic parameters of the electrode reactions if the IR drop is not carefully eliminated. The described interrupter technique gives the same results for the ohmic resistance RΩ as eg AC techniques or potential pulse measurements. The value of RΩ measured is always associated with the primary current distribution.
1982
non-aqueous media; ohmic drop; interrupter
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/44610
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 9
  • ???jsp.display-item.citation.isi??? ND
social impact