A new method of studying ion transfer at liquid vertical bar liquid phase boundaries using a carbon nanotube paste electrode with a redox active binder

Kachoosangi, Roohollah Torabi, Xiao, Lei, Wildgoose, Gregory G., Marken, Frank, Bulman Page, Philip C. and Compton, Richard G. (2007) A new method of studying ion transfer at liquid vertical bar liquid phase boundaries using a carbon nanotube paste electrode with a redox active binder. The Journal of Physical Chemistry C, 111 (49). pp. 18353-18360. ISSN 1932-7447

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Abstract

We report a new method for the study of voltammetric processes at liquid vertical bar liquid interfaces, namely that of using a redox active organic oil as the binder in a carbon nanotube (CNT) paste electrode. Specifically we report voltarnmetry at the,liqui vertical bar liquid interface studied at a N,N-didodecyl-N',N'-diethylphenylenediamine (DDPD, as binder) CNT paste electrode immersed in aqueous electrolytes containing potassium salts of various anions (AsF6-, PF6_, ClO4-, SCN-, I-, NO3, Br-, Cl-, F-, and SO42-). Ion transfer across the liquid vertical bar liquid interface occurs to maintain electroneutrality upon oxidation of the DDPD, the direction of which, and the subsequent effect upon the observed voltammetric response, is found to be driven by the relative hydrophobicity of the ions involved. This method of studying liquid vertical bar liquid interfaces offers significant advantages, not least with regard to ease of electrode fabrication and cleaning and the formation of multiple three-phase boundaries (at which any voltarnmetry must occur) due to the structure of the DDPD-CNT paste vertical bar aqueous electrolyte interface.

Item Type: Article
Uncontrolled Keywords: electroactive oil droplets,photochemical-reactions,graphite-electrodes,insertion processes,anion transfer,square-wave,voltammetry,film-modified electrodes,cyclic,liquid interfaces,water interface
Faculty \ School: Faculty of Science > School of Chemistry
Depositing User: Rachel Smith
Date Deposited: 20 Jun 2011 13:39
Last Modified: 21 Apr 2020 19:25
URI: https://ueaeprints.uea.ac.uk/id/eprint/32880
DOI: 10.1021/jp0763275

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