Fabricating high-purity graphite disk electrodes as a cost-effective alternative in fundamental electrochemistry research

Author:

Spallacci ClaudiaORCID,Görlin MikaelaORCID,Kumar AmolORCID,D’Amario LucaORCID,Cheah Mun HonORCID

Abstract

AbstractGraphite electrodes offer remarkable electrochemical properties, emerging as a viable alternative to glassy carbon (GCE) and other carbon-based electrodes for fundamental electrochemistry research. We report the fabrication and characterization of high-purity graphite disk electrodes (GDEs), made from cost-effective materials and a solvent-free methodology employing readily available laboratory equipment. Analysis of their physical properties via SEM, EDX and XPS reveals no metallic interferences and a notably high porosity, emphasizing their potential. The electrochemical performances of GDEs were found to be comparable to those of GCE. Immobilization of peptides and enzymes, both via covalent coupling and surface adsorption, was used to explore potential applications of GDEs in bioelectrochemistry. Enzyme activity could be addressed both via direct electron transfer and mediated electron transfer mechanism. These results highlight the interesting properties of our GDEs and make them a low-cost alternative to other carbon-based electrodes, with potential for future real-world applications.

Funder

Energimyndigheten

Stiftelsen Åforsk

Uppsala University

Publisher

Springer Science and Business Media LLC

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