A Multiple Evaluation Approach of Commercially Available Screen‐Printed Nanostructured Carbon Electrodes. Issue 8 (24th June 2014)

• Record Type: Journal Article
• Authors: Grimaldi, Aldana; Heijo, Gonzalo; Méndez, Eduardo
• Is Part Of: Electroanalysis. Volume 26:Issue 8(2014:Aug.)
• Page Start: 1684
• Page End: 1693
• Publication Date: 2014-06-24
• Subjects: Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.201400122
• Languages: English
• ISSNs: 1040-0397

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Commercially available carbon‐based screen‐printed electrodes were studied by cyclic voltammetry and electrochemical impedance spectroscopy in their behavior towards electron transfer to the soluble fast redox probes hexacyanoferrate(III), hexaammineruthenium(III) and methyl‐viologen. Semi‐infinite linear diffusion was observed for hexacyanoferrate(III) probe, with heterogeneous electron transfer rate constants significantly favored on nanotubes‐modified surfaces. Finite diffusion was observed for methyl‐viologen on graphene electrodes, which was reflected in the enhancement of the faradic currents by 4‐folds. Hexaammineruthenium(III) showed mixed diffusion behavior. These characteristics are reflected in the voltammetric behavior of lead(II) and cadmium(II) stripping from in‐situ deposited bismuth layer.</p> </abstract>