An EQCM investigation of capacitance of MnO2 in electrolytes containing multivalent cations

Nayak, Prasant Kumar and Munichandraiah, N (2012) An EQCM investigation of capacitance of MnO2 in electrolytes containing multivalent cations. In: JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 685 . pp. 37-40.

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Abstract

MnO2 is electrochemically deposited on Au coated quartz crystal to study the electrochemical capacitance properties and to monitor the mass variations that accompany reversible adsorption/desorption of Na+, Mg2+ and La3+ ions during discharge/charge cycling. There is an increase in the values of specific capacitance of MnO2 with increase in charge of the cation in the electrolyte. Also, there is an increase in mass during discharge due to adsorption of cations from the electrolyte resulting from reduction of MnO2. Mass decreases during charging process due to desorption of cations. The magnitude of mass variation is approximately proportional to the atomic weight of the cationic element. (C) 2012 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Publisher:	ELSEVIER SCIENCE SA
Additional Information:	Copyright for this article belongs to the ELSEVIER SCIENCE SA, SWITZERLAND
Keywords:	EQCM;Electrodeposition;Manganese dioxide;Specific capacitance;Multivalent cations
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	02 Jan 2013 08:45
Last Modified:	02 Jan 2013 08:45
URI:	http://eprints.iisc.ac.in/id/eprint/45597

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