Hybrid Materials from Carbon Nanotubes, Nickel Tetrasulfonated Phthalocyanine and Thin Polymer Layers for the Selective Electrochemical Activation of Nitric Oxide in Solution
✍ Scribed by Ana Porras Gutierrez; Sophie Griveau; Cyrille Richard; Alain Pailleret; Silvia Gutierrez Granados; Fethi Bedioui
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 580 KB
- Volume
- 21
- Category
- Article
- ISSN
- 1040-0397
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✦ Synopsis
Abstract
The elaboration of hybrid materials from single‐wall carbon nanotubes (SWCNT) and tetrasulfonated nickel phthalocyanine (NiTSPc) was electrochemically performed to obtain chemically modified electrodes with improved electrocatalytic activity towards the electrooxidation of nitric oxide (NO). The characterization of these hybrid electrodes was achieved by cyclic voltammetry and AFM. The electrochemical performances of the electrodes towards the oxidation of NO were then analyzed by chronoamperometry and the obtained results show that the presence of SWCNT greatly enhances the electrocatalytic performances in terms of current intensity. Additional coatings were then electrodeposited over the hybrid electrodes to act as selective membranes against four major interfering analytes: nitrite, ascorbate, hydrogen peroxide and L‐arginine. Several polymer coatings were tested to achieve the best balance between sensitivity to NO and selectivity against interferents.