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Some Consequences of the Significantly Different Mobilities of Hydrophilic and Hydrophobic Metal Complexes in Perfluorosulfonated Ionomer Coatings on Electrodes

Shi, Minglian and Anson, Fred C. (1997) Some Consequences of the Significantly Different Mobilities of Hydrophilic and Hydrophobic Metal Complexes in Perfluorosulfonated Ionomer Coatings on Electrodes. Analytical Chemistry, 69 (14). pp. 2653-2660. ISSN 0003-2700. https://resolver.caltech.edu/CaltechAUTHORS:20171120-141114122

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Abstract

Thin coatings of Nafion on glassy carbon rotating disk electrodes were saturated with hydrophilic [Ru(NH_3)_6^(3+), Co(NH_3)_6^(3+)] or hydrophobic [Ru(bpy)_3^(2+)] counterions. With both types of counterions, the plateau currents obtained when the electrodes were rotated in solutions of the cations matched the currents obtained with the uncoated electrodes in the same solutions at all accessible rotation rates. The high rates of cross-coating charge propagation demonstrated by these results involved physical diffusion of the hydrophilic complexes and electron hopping between adjacent, immobile pairs of the hydrophobic complexes. The approximate concentration profiles that develop within, and just outside of, Nafion coatings on disk electrodes that are rotated in solutions of electroactive counterions are depicted.


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https://doi.org/10.1021/ac970137gDOIArticle
http://pubs.acs.org/doi/abs/10.1021/ac970137gPublisherArticle
Additional Information:© 1997 American Chemical Society. Received for review February 5, 1997. Accepted April 30, 1997. Publication Date (Web): July 15, 1997. This work was supported by the National Science Foundation.
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Issue or Number:14
Record Number:CaltechAUTHORS:20171120-141114122
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20171120-141114122
Official Citation:Some Consequences of the Significantly Different Mobilities of Hydrophilic and Hydrophobic Metal Complexes in Perfluorosulfonated Ionomer Coatings on Electrodes. Minglian Shi and Fred C. Anson. Analytical Chemistry 1997 69 (14), 2653-2660. DOI: 10.1021/ac970137g
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:83353
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:20 Nov 2017 22:22
Last Modified:03 Oct 2019 19:05

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