Determination of the surface area of loose metal deposits by impedance spectroscopy / Nikitin V. S.,Rudoi V. M.,Ostanina T. N.,Dolmatova E. A. // JOURNAL OF ANALYTICAL CHEMISTRY. - 2017. - V. 72, l. 4. - P. 390-395.

ISSN/EISSN:

1061-9348 / 1608-3199

Type:

Article

Abstract:

The surface area and fractal dimensions of the surface of loose copper and zinc deposits obtained within 30 and 300 s at direct current sixfold exceeding limiting diffusion current on a smooth electrode were in situ determined by impedance spectroscopy. Impedance measurements were performed in 0.5 M Na2SO4 solution. A constant phase element taking into account the distribution of double-layer capacitance over the fractal surface of the electrode was used in the equivalent impedance scheme. Specific surface calculated with regard to the weight of the released metal slightly varied within 300 s (from 6.16 to 6.55 and from 7.12 to 5.89 m(2)/g for copper and zinc deposits, respectively). Fractal dimensions estimated by chronopotentiometry were given for comparison. Fractal dimensions found by two methods for loose copper and zinc deposits agree with each other; their values (2.19-2.75) testify that the surface of the deposits densely fills the space.

Author keywords:

impedance spectroscopy; constant phase element; chronopotentiometry; loose metal deposits; specific surface; fractal dimensions

DOI:

10.1134/S1061934817040098

Web of Science ID:

ISI:000399822400007

Соавторы в МНС:

Другие поля

Поле	Значение
Month	APR
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1608-3199
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Analytical
Author-Email	nikitin-viachieslav@mail.ru
Funding-Acknowledgement	Government of the Russian Federation {[}211, 02.A03.21.0006]
Funding-Text	This work was supported by the Government of the Russian Federation (program 211, no. 02.A03.21.0006). The research was partially conducted using the equipment of the Center of Collective Use ``Composition of Substances{''} of the Institute of High-Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences.
Number-of-Cited-References	14
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	1
Journal-ISO	J. Anal. Chem.
Doc-Delivery-Number	ES8QR