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Electrocatalytic oxidation of NADH at carbon paste electrodes modified with Meldola Blue adsorbed on zirconium phosphate: effect of Ca2+ and polyethyleneimine

Ladiu, Ioana LU ; Popescu, IC and Gorton, Lo LU (2005) In Journal of Solid State Electrochemistry 9(5). p.296-303
Abstract
The basic electrochemistry of carbon paste electrodes modified with Meldola Blue adsorbed on zirconium phosphate (MB-ZP-CPEs) and their ability to oxidize NADH have been investigated. Three types of carbon powder (graphite and glassy carbon-type Sigradur K and G) were used to obtain MB-ZP-CPEs. On comparing cyclic voltammograms recorded at MB-ZP-CPEs, similarly prepared from the three different carbon powders, those made with Sigradur K exhibited the lowest background current, and the best MB electrochemistry, seen as the highest peak intensities and smallest peak separation. Using MB-ZP-CPEs based on Sigradur K a study on NADH oxidation was done focusing on the effect of the Ca2+ concentration in the contacting solution and on the... (More)
The basic electrochemistry of carbon paste electrodes modified with Meldola Blue adsorbed on zirconium phosphate (MB-ZP-CPEs) and their ability to oxidize NADH have been investigated. Three types of carbon powder (graphite and glassy carbon-type Sigradur K and G) were used to obtain MB-ZP-CPEs. On comparing cyclic voltammograms recorded at MB-ZP-CPEs, similarly prepared from the three different carbon powders, those made with Sigradur K exhibited the lowest background current, and the best MB electrochemistry, seen as the highest peak intensities and smallest peak separation. Using MB-ZP-CPEs based on Sigradur K a study on NADH oxidation was done focusing on the effect of the Ca2+ concentration in the contacting solution and on the addition of polyethyleneimine (PEI) into the paste. It can be stated that MB-ZP-CPEs based on Sigradur K and containing 1.23% (w/w) PEI exhibited the best behavior for NADH oxidation, measured by the highest electrocatalytic rate constant (8.2 x 10(3) M-1 s(-1)). (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Solid State Electrochemistry
volume
9
issue
5
pages
296 - 303
publisher
Springer
external identifiers
  • wos:000229504200009
  • scopus:21144435869
ISSN
1433-0768
DOI
10.1007/s10008-004-0618-6
language
English
LU publication?
yes
id
7ef57d37-d36d-4eab-a824-91e4229f1a9c (old id 151038)
date added to LUP
2007-06-27 09:46:31
date last changed
2017-01-01 04:24:51
@article{7ef57d37-d36d-4eab-a824-91e4229f1a9c,
  abstract     = {The basic electrochemistry of carbon paste electrodes modified with Meldola Blue adsorbed on zirconium phosphate (MB-ZP-CPEs) and their ability to oxidize NADH have been investigated. Three types of carbon powder (graphite and glassy carbon-type Sigradur K and G) were used to obtain MB-ZP-CPEs. On comparing cyclic voltammograms recorded at MB-ZP-CPEs, similarly prepared from the three different carbon powders, those made with Sigradur K exhibited the lowest background current, and the best MB electrochemistry, seen as the highest peak intensities and smallest peak separation. Using MB-ZP-CPEs based on Sigradur K a study on NADH oxidation was done focusing on the effect of the Ca2+ concentration in the contacting solution and on the addition of polyethyleneimine (PEI) into the paste. It can be stated that MB-ZP-CPEs based on Sigradur K and containing 1.23% (w/w) PEI exhibited the best behavior for NADH oxidation, measured by the highest electrocatalytic rate constant (8.2 x 10(3) M-1 s(-1)).},
  author       = {Ladiu, Ioana and Popescu, IC and Gorton, Lo},
  issn         = {1433-0768},
  language     = {eng},
  number       = {5},
  pages        = {296--303},
  publisher    = {Springer},
  series       = {Journal of Solid State Electrochemistry},
  title        = {Electrocatalytic oxidation of NADH at carbon paste electrodes modified with Meldola Blue adsorbed on zirconium phosphate: effect of Ca2+ and polyethyleneimine},
  url          = {http://dx.doi.org/10.1007/s10008-004-0618-6},
  volume       = {9},
  year         = {2005},
}