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AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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The STUDIA UNIVERSITATIS BABEŞ-BOLYAI issue article summary The summary of the selected article appears at the bottom of the page. In order to get back to the contents of the issue this article belongs to you have to access the link from the title. In order to see all the articles of the archive which have as author/co-author one of the authors mentioned below, you have to access the link from the author's name. |
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STUDIA CHEMIA - Issue no. 4 / 2011 | |||||||
Article: |
NADH OXIDATION AT MELDOLA BLUE MODIFIED GLASSY CARBON ELECTRODES. A COMPARATIVE STUDY. Authors: IONEL CĂTĂLIN POPESCU. |
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Abstract:
Three types of modified electrodes based on glassy carbon (powder and rod) and Meldola Blue (MB) were used for NADH electrocatalytic oxidation. MB was immobilized by simple adsorption on two different phosphates materials, crystalline zirconium phosphate (α-ZP) and crystalline titanium phosphate (α-TP), as well as on carbon aerogel (CA). The phosphate materials were incorporated in carbon paste, while CA was immobilized on a glassy carbon rod using a chitosan matrix. The basic electrochemistry of adsorbed MB and its ability to catalyze NADH electrooxidation have been investigated by cyclic voltammetry, performed in different experimental conditions (pH, potential scan rate, NADH concentration). The electroanalytical parameters of the investigated modified electrodes showed that: (i) irrespective the material, the formal standard potential of the immobilized MB was found pH dependent; (ii) the best electrocatalytic response was obtained for MB-αTP modified electrode. Keywords: electrocatalysis, NADH electrooxidation, glassy carbon electrode, redox dyes |
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