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Preparation, characterization, and electrocatalytic properties of hybrid coatings of hexacyanometalate-doped-cationic films

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Abstract

Electrochemically active hybrid coatings based on cationic films, didodecyldimethylammonium bromide (DDAB), and poly(diallyldimethylammonium chloride) (PDDAC) are prepared on electrode surface by cycling the film-covered electrode repetitively in a pH 6.5 solution containing Fe(CN)6 3− and Ru(CN)6 4− anions. Modified electrodes exhibited stable and reversible voltammetric responses corresponding to characteristics of Fe(CN)6 3−/4− and Ru(CN)6 4−/3− redox couples. The cyclic voltammetric features of hybrid coatings resemble that of electron transfer process of surface-confined redox couple. Electrochemical quartz crystal microbalance results show that more amounts of electroactive anionic complexes partitioned into DDAB coating than those doped into PDDAC coating from the same doping solution. Peak potentials of hybrid film-bound redox couples showed a negative shift compared to those at bare electrode and this shift was more pronounced in the case of DDAB. Finally, the advantages of hybrid coatings in electrocatalysis are demonstrated with sulfur oxoanions.

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Acknowledgements

This work was financially supported by the National Science Council of Taiwan (ROC).

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Authors and Affiliations

  1. Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei, Taiwan, 106, Republic of China

    Shen-Ming Chen, Wen-Yan Chzo & R. Thangamuthu

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  1. Shen-Ming Chen
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  2. Wen-Yan Chzo
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  3. R. Thangamuthu
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Correspondence to Shen-Ming Chen.

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Chen, SM., Chzo, WY. & Thangamuthu, R. Preparation, characterization, and electrocatalytic properties of hybrid coatings of hexacyanometalate-doped-cationic films. J Solid State Electrochem 12, 1487–1495 (2008). https://doi.org/10.1007/s10008-007-0486-y

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  • DOI: https://doi.org/10.1007/s10008-007-0486-y

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