NADH electrocatalytic oxidation at glassy carbon paste electrodes modified with meldola blue adsorbed on acidic alpha-zirconium phosphate
(2007) In Revue Roumaine de Chimie 52(1-2). p.67-74- Abstract
- The electrochemical behavior and the electrocatalytic activity for the NADH oxidation at glassy carbon paste electrodes (GCPEs) modified with Meldola Blue (MB) adsorbed onto acidic cc-zirconium phosphate (ZP*) have been investigated. Cyclic voltammetry and rotating disc electrode measurements, performed in Tris buffer solution (pH 7) in absence and in presence of different NADH concentrations, showed that: (i) the formal standard potential (E degrees') of NIB was found pH dependent, according to the equation E = E degrees (c)-0.059pH + 0.029log(1 + 10(pH-pKa)), where the best fitting value for pK(a) Was estimated to be 4.3 +/- 0.4; (ii) the best electrocatalytic response was obtained for MB-ZP*-modified GCPEs having a ratio between the... (More)
- The electrochemical behavior and the electrocatalytic activity for the NADH oxidation at glassy carbon paste electrodes (GCPEs) modified with Meldola Blue (MB) adsorbed onto acidic cc-zirconium phosphate (ZP*) have been investigated. Cyclic voltammetry and rotating disc electrode measurements, performed in Tris buffer solution (pH 7) in absence and in presence of different NADH concentrations, showed that: (i) the formal standard potential (E degrees') of NIB was found pH dependent, according to the equation E = E degrees (c)-0.059pH + 0.029log(1 + 10(pH-pKa)), where the best fitting value for pK(a) Was estimated to be 4.3 +/- 0.4; (ii) the best electrocatalytic response was obtained for MB-ZP*-modified GCPEs having a ratio between the glassy carbon powder (Sigradur K) and MB-ZP* of 19:1; (iii) the presence of polyethyleneimine in the paste has a significant beneficial effect on the electrocatalytic activity of the investigated modified electrodes. As a general conclusion, it was stated that the particular features of the MB-ZP*-GCPEs are related to the ZP* crystallinity. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/647644
- author
- Ladiu, Carmen Ioana ; Garcia, Jose R. ; Popescu, Ionel Catalin and Gorton, Lo LU
- organization
- publishing date
- 2007
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Revue Roumaine de Chimie
- volume
- 52
- issue
- 1-2
- pages
- 67 - 74
- publisher
- Romanian Academy / Academia Române
- external identifiers
-
- wos:000247608100005
- scopus:34547274078
- ISSN
- 0035-3930
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Analytical Chemistry (S/LTH) (011001004)
- id
- a6af08ca-9c85-48b2-9bd7-fe720150a33a (old id 647644)
- date added to LUP
- 2016-04-01 16:39:28
- date last changed
- 2022-01-28 21:12:16
@article{a6af08ca-9c85-48b2-9bd7-fe720150a33a,
abstract = {{The electrochemical behavior and the electrocatalytic activity for the NADH oxidation at glassy carbon paste electrodes (GCPEs) modified with Meldola Blue (MB) adsorbed onto acidic cc-zirconium phosphate (ZP*) have been investigated. Cyclic voltammetry and rotating disc electrode measurements, performed in Tris buffer solution (pH 7) in absence and in presence of different NADH concentrations, showed that: (i) the formal standard potential (E degrees') of NIB was found pH dependent, according to the equation E = E degrees (c)-0.059pH + 0.029log(1 + 10(pH-pKa)), where the best fitting value for pK(a) Was estimated to be 4.3 +/- 0.4; (ii) the best electrocatalytic response was obtained for MB-ZP*-modified GCPEs having a ratio between the glassy carbon powder (Sigradur K) and MB-ZP* of 19:1; (iii) the presence of polyethyleneimine in the paste has a significant beneficial effect on the electrocatalytic activity of the investigated modified electrodes. As a general conclusion, it was stated that the particular features of the MB-ZP*-GCPEs are related to the ZP* crystallinity.}},
author = {{Ladiu, Carmen Ioana and Garcia, Jose R. and Popescu, Ionel Catalin and Gorton, Lo}},
issn = {{0035-3930}},
language = {{eng}},
number = {{1-2}},
pages = {{67--74}},
publisher = {{Romanian Academy / Academia Române}},
series = {{Revue Roumaine de Chimie}},
title = {{NADH electrocatalytic oxidation at glassy carbon paste electrodes modified with meldola blue adsorbed on acidic alpha-zirconium phosphate}},
volume = {{52}},
year = {{2007}},
}