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Influence of Organic Solvents on the Kinetics of Electron Transfer and the Adsorption at Highly Oriented Pyrolytic Graphite

Liu, Yi and Freund, Michael S. (2000) Influence of Organic Solvents on the Kinetics of Electron Transfer and the Adsorption at Highly Oriented Pyrolytic Graphite. Langmuir, 16 (2). pp. 283-286. ISSN 0743-7463. https://resolver.caltech.edu/CaltechAUTHORS:20170725-072343042

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Abstract

Acetonitrile and several other common organic solvents have been found to dramatically influence the kinetics of electron transfer and the adsorption at freshly cleaved highly oriented pyrolytic graphite (HOPG). Ferricyanide and anthraquinone-2,6-disulfonate were used to investigate the effect of several pretreatment procedures including cleaving, electrochemical pretreatment, and thermal etching on the activity of basal plane HOPG. The results of this work suggest that although active sites produced by cleaving are relatively stable in air and in aqueous solution, exposure to organic solvents quickly and irreversibly passivates them toward simple outer-sphere electron transfer and adsorption. In contrast, electrochemically pretreated and thermally etched HOPG is much less sensitive to organic solvents, suggesting that the natures of the active sites produced by these methods are significantly different. As a result, it is important to take into account this behavior when using freshly cleaved HOPG in surface and electrochemical studies.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/la991044sDOIArticle
http://pubs.acs.org/doi/abs/10.1021/la991044sPublisherArticle
ORCID:
AuthorORCID
Freund, Michael S.0000-0003-1104-2292
Additional Information:© 2000 American Chemical Society. Received 2 August 1999. Published online 23 December 1999. Published in print 1 January 2000. We wish to thank Lehigh University for support of this work. Y.L. acknowledges the Buch Fellowship from Department of Chemistry, Lehigh University.
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Lehigh UniversityUNSPECIFIED
Issue or Number:2
Record Number:CaltechAUTHORS:20170725-072343042
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170725-072343042
Official Citation:Influence of Organic Solvents on the Kinetics of Electron Transfer and the Adsorption at Highly Oriented Pyrolytic Graphite Yi Liu and and Michael S. Freund*,† Langmuir 2000 16 (2), 283-286 DOI: 10.1021/la991044s
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:79315
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:25 Jul 2017 16:26
Last Modified:03 Oct 2019 18:18

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