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Article

Enhancement of the Negative Capacitance Associated with the Dissolution of Silver by Salt Concentrations by Means of Anodic Stripping Voltammetry

by
Ru Wang
1,
Koichi Jeremiah Aoki
2 and
Jingyuan Chen
1,*
1
Department of Applied Physics, University of Fukui, 3-9-1 Bunkyo, Fukui 910-0017, Japan
2
Electrochemistry Museum, Fukui 910-0804, Japan
*
Author to whom correspondence should be addressed.
Electrochem 2022, 3(3), 397-406; https://doi.org/10.3390/electrochem3030027
Submission received: 2 June 2022 / Revised: 8 July 2022 / Accepted: 15 July 2022 / Published: 25 July 2022
(This article belongs to the Special Issue Electrochemistry Modulated Interfacial Processes: Fundamental and Application)
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Abstract

The amount of anodically dissolved charge of silver by linear sweep stripping voltammetry has been observed to be smaller than that of the potentiostatically deposited charge. The imbalance in the charge is opposite to the participation in the double-layer capacitance. This can be explained in terms of the negative capacitive current, which is caused by dipoles of generated redox charge (Ag+) with counterions (NO3−). Lower concentrations of counterions may suppress the capacitance to retain the equality of the charge. This prediction is examined in this work by the oxidation of silver film at various concentrations of NO3− by anodic stripping voltammetry. The capacitance decreased with a decrease in the salt concentrations less than 0.05 mol dm−3. Low concentrations of salts prevent loss of the anodic charge in electroanalysis. This dependence was related with the lifespan of generated silver nitrate dipoles and is described theoretically.
Keywords: anodic stripping voltammetry of silver ion; negative capacitance associated with redox reactions; lifespan of dipoles; low concentration of salts anodic stripping voltammetry of silver ion; negative capacitance associated with redox reactions; lifespan of dipoles; low concentration of salts

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MDPI and ACS Style

Wang, R.; Aoki, K.J.; Chen, J. Enhancement of the Negative Capacitance Associated with the Dissolution of Silver by Salt Concentrations by Means of Anodic Stripping Voltammetry. Electrochem 2022, 3, 397-406. https://doi.org/10.3390/electrochem3030027

AMA Style

Wang R, Aoki KJ, Chen J. Enhancement of the Negative Capacitance Associated with the Dissolution of Silver by Salt Concentrations by Means of Anodic Stripping Voltammetry. Electrochem. 2022; 3(3):397-406. https://doi.org/10.3390/electrochem3030027

Chicago/Turabian Style

Wang, Ru, Koichi Jeremiah Aoki, and Jingyuan Chen. 2022. "Enhancement of the Negative Capacitance Associated with the Dissolution of Silver by Salt Concentrations by Means of Anodic Stripping Voltammetry" Electrochem 3, no. 3: 397-406. https://doi.org/10.3390/electrochem3030027

APA Style

Wang, R., Aoki, K. J., & Chen, J. (2022). Enhancement of the Negative Capacitance Associated with the Dissolution of Silver by Salt Concentrations by Means of Anodic Stripping Voltammetry. Electrochem, 3(3), 397-406. https://doi.org/10.3390/electrochem3030027

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