Vittal, R. and Kim, K.J. and Gomathi, H. and Yegnaraman, V. (2008) CTAB-Promoted Prussian Blue-Modified Electrode and Its Cation Transport Characteristics for K+, Na+, Li+, and NH4 + Ions. Journal of Physical Chemistry B, 112 (4). pp. 1149-1156. ISSN 1520-6106

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A Prussian blue (PB) film was deposited on a glassy carbon (GC) electrode by cyclic voltammetry in the presence of the cationic surfactant cetyltrimethylammonium bromide (CTAB). The electrode thus formed showed 4-fold enhancements in redox current and charge values in pure KCl electrolyte as well as greater stability than an electrode prepared in the absence of CTAB. This improved performance of a PB + CTAB electrode versus a PB electrode was further demonstrated using SEM, XRD, and electrochemical impedance spectroscopy (EIS) measurements. A comparative study was undertaken on the cation transport characteristics of PB and PB + CTAB electrodes for Na+, Li+, and NH4 + ions. We obtained a CV pattern for a CTABpromoted PB film, which showed ideal Nernstian behavior at all scan rates from 5 to 140 mV s-1. Conditions for the formation and preservation of these ideal and stable PB films are discussed. Possible mechanisms for the beneficial effects of CTAB are proposed.

Item Type: Article
Subjects: Electrodics and Electrocatalysis
Depositing User: ttbdu cecri
Date Deposited: 19 Jan 2012 08:37
Last Modified: 19 Jan 2012 08:37

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