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Fast-scan cyclic voltammetry and scanning electrochemical microscopy studies of the pH-dependent dissolution of 2-electron mediators immobilized on zirconium phosphate containing carbon pastes

Munteanu, Florentina LU ; Mosbach, M; Schulte, A; Schuhmann, W and Gorton, Lo LU (2002) In Electroanalysis 14(21). p.1479-1487
Abstract
A detailed study is presented on the leaking of two different 2-electron-transfer redox mediators from zirconium phosphate-modified carbon-paste electrodes. Two redox mediators commonly used in bioelectrochemistry, viz. methylene green and riboflavin, were adsorbed on zirconium phosphate and further integrated into carbon paste. Fast scan cyclic voltammetry and scanning electrochemical microscopy were used to characterize the leakage of these redox mediators at different pH conditions. It could be shown that an exposure to acidic pH-values significantly increased the rate of their leakage from the mediator-zirconium phosphate-modified carbon paste, whereas a tight adsorption was observed at neutral pH.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
carbon-paste electrodes, modified, zirconium phosphate, leakage, methylene green, riboflavin, fast-scan cyclic voltammetry, scanning, electrochemical microscopy (SECM)
in
Electroanalysis
volume
14
issue
21
pages
1479 - 1487
publisher
John Wiley & Sons
external identifiers
  • wos:000179597300004
  • scopus:0036861893
ISSN
1040-0397
DOI
10.1002/1521-4109(200211)14:21<1479::AID-ELAN1479>3.0.CO;2-T
language
English
LU publication?
yes
id
dd75eec7-d074-436d-a55a-78658326b3b9 (old id 322450)
date added to LUP
2007-11-02 13:06:38
date last changed
2017-01-01 06:55:47
@article{dd75eec7-d074-436d-a55a-78658326b3b9,
  abstract     = {A detailed study is presented on the leaking of two different 2-electron-transfer redox mediators from zirconium phosphate-modified carbon-paste electrodes. Two redox mediators commonly used in bioelectrochemistry, viz. methylene green and riboflavin, were adsorbed on zirconium phosphate and further integrated into carbon paste. Fast scan cyclic voltammetry and scanning electrochemical microscopy were used to characterize the leakage of these redox mediators at different pH conditions. It could be shown that an exposure to acidic pH-values significantly increased the rate of their leakage from the mediator-zirconium phosphate-modified carbon paste, whereas a tight adsorption was observed at neutral pH.},
  author       = {Munteanu, Florentina and Mosbach, M and Schulte, A and Schuhmann, W and Gorton, Lo},
  issn         = {1040-0397},
  keyword      = {carbon-paste electrodes,modified,zirconium phosphate,leakage,methylene green,riboflavin,fast-scan cyclic voltammetry,scanning,electrochemical microscopy (SECM)},
  language     = {eng},
  number       = {21},
  pages        = {1479--1487},
  publisher    = {John Wiley & Sons},
  series       = {Electroanalysis},
  title        = {Fast-scan cyclic voltammetry and scanning electrochemical microscopy studies of the pH-dependent dissolution of 2-electron mediators immobilized on zirconium phosphate containing carbon pastes},
  url          = {http://dx.doi.org/10.1002/1521-4109(200211)14:21<1479::AID-ELAN1479>3.0.CO;2-T},
  volume       = {14},
  year         = {2002},
}