Reduction charge smaller than the deposited one in cathodic stripping voltammograms of AgCl

Material type: 文書・図像類

Author: Peng, Tangほか

Publisher: Scientific Research Publishing

Publication date: 2019-08

Material Format: Digital

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Note (General)：: A silver electrode was anodized in lowly concentrated potassium chloride solution almost under the steady state to generate a deposit of silver chlori...

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Material Type: 文書・図像類
Title: Reduction charge smaller than the deposited one in cathodic stripping voltammograms of AgCl
Author/Editor: Peng, Tang
Koichi, Jeremiah Aoki
Jingyuan, Chen
Author Heading: Peng, Tang
Koichi, Jeremiah Aoki
Jingyuan, Chen
Publication, Distribution, etc.: Scientific Research Publishing
Publication Date: 2019-08
Publication Date (W3CDTF): 2019-08
Periodical title: American Journal of Analytical Chemistry
No. or year of volume/issue: 10
Volume: 10
Pages: 286-295
ISSN (Periodical Title): ISSN : 2156-8278
ISSN : 2156-8251
Text Language Code: eng
Subject Heading: Silver Electrode
Double Layer Capacitance
Stripping Voltammetry
Chronocoulometry
Time-Dependent Charge
Target Audience: 一般
Note (General): A silver electrode was anodized in lowly concentrated potassium chloride solution almost under the steady state to generate a deposit of silver chloride on the electrode, and the deposit was cathodically stripped by linear potential scan to evaluate the reduction charge. Then the oxidation charge was larger than the reduction one. Since the equality was valid for long term chronocoulometry at the double potential step, the inequality is not due to any irreversibility of electrode reactions, but can be attributed to the process of the cathodic potential scan. A reason for the inequality is the negative charge of the capacitance involved in the electrode reaction, which has been observed in simple, dissolved redox species like a ferrocenyl derivative. The negative capacitive currents are conspicuous for high concentrations of redox species on the electrode because they result from the orientation of the dipoles of the redox species coupled with counterion, of which direction is opposite to that of the solvent dipoles. If a silver chloride film was thin enough to be regarded as a monolayer, we found that half of the cathodic stripping charge should be lost by the negative capacitance.
Access Restrictions: 限定公開
Related Material (DOI): 10.4236/ajac.2019.108021
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 福井大学 : 福井大学学術機関リポジトリ