New Approaches to the Characterization of Carbon Paste Electrodes Using the Ohmic Resistance Effect and Qualitative Carbon Paste Indexes

Mikysek, T.; Švancara, I.; Kalcher, K.; Bartoš, M.; Vytřas, K.; Ludvík, Jiří

doi:https://dx.doi.org/10.1021/ac9004937

Number of the records: 1

New Approaches to the Characterization of Carbon Paste Electrodes Using the Ohmic Resistance Effect and Qualitative Carbon Paste Indexes

1.

SYSNO ASEP	0328295
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	New Approaches to the Characterization of Carbon Paste Electrodes Using the Ohmic Resistance Effect and Qualitative Carbon Paste Indexes
Title	Nové přístupy k charakterizaci uhlíkových pastových elektrod založené na změnách ohmického odporu a na kvalitativních indexech jednotlivých uhlíkových past
Author(s)	Mikysek, T. (CZ) Švancara, I. (CZ) Kalcher, K. (AT) Bartoš, M. (CZ) Vytřas, K. (CZ) Ludvík, Jiří (UFCH-W)_{RID, ORCID}
Source Title	Analytical Chemistry. - : American Chemical Society - ISSN 0003-2700 Roč. 81, č. 15 (2009), s. 6327-6333
Number of pages	7 s.
Language	eng - English
Country	US - United States
Keywords	voltammetry ; electroanalysis ; extraction
Subject RIV	CG - Electrochemistry
R&D Projects	LC510 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z40400503 - UFCH-W (2005-2011)
UT WOS	000268455600048
DOI	10.1021/ac9004937
Annotation	In this article, some new approaches to characterize the carbon paste mixtures and the respective carbon paste electrodes (CPEs) are presented, discussed, and critically evaluated. Particular attention has been paid to the changes of the ohmic resistance, relative to the dependence on composition of the CPE, the materials used, the time, and the position of storage. Four types of carbon pastes were examined, and for the interpretation of experimental data, a new simple model of "close-packing of spheres" has been applied. This model resembles the percolation theory for solid matter. In our case, however, it is possible to explain not only the "bent" or "broken" shape of the dependence of the electrode resistance upon the binder:carbon ratio and the corresponding electrochemical current response, but also differences caused by various material used and three various effects observed during the electrode aging.
Workplace	J. Heyrovsky Institute of Physical Chemistry
Contact	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Year of Publishing	2010

Number of the records: 1