A Multiple Evaluation Approach of Commercially Available Screen-Printed Nanostructured Carbon Electrodes

作者：Grimaldi Aldana; Heijo Gonzalo; Mendez Eduardo^*

来源：Electroanalysis, 2014, 26(8): 1684-1693.

DOI：10.1002/elan.201400122

• Diffusion regimes
• Nanostructures
• Redox probes
• Screen-printed electrodes
• Thin films

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.

• 出版日期2014-8