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Development of a 3D Graphene Electrode Dielectrophoretic Device
Published on: June 22, 2014
Exploring the electrochemical performance of graphitic paste electrodes: graphene vs. graphite
Luiz C S Figueiredo-Filho1, Dale A C Brownson, Maria Gómez-Mingot
1Departamento de Química, Universidade Federal de São Carlos, P. O. Box 676, 13560-970, São Carlos - SP, Brazil.
The Analyst
|September 7, 2013
Summary
Graphene paste electrodes were fabricated and tested for electroanalysis. Researchers found no electrochemical performance advantages over traditional graphite paste electrodes.
Area of Science:
- Electrochemistry
- Materials Science
- Analytical Chemistry
Background:
- Paste electrodes are widely used in electroanalysis due to their ease of use and renewability.
- Graphene has emerged as a promising material for electrochemical applications due to its unique properties.
Purpose of the Study:
- To fabricate and characterize a graphene paste electrode.
- To evaluate the electrochemical performance of graphene paste electrodes compared to graphite paste electrodes.
- To explore the potential benefits of graphene in paste electrode fabrication for electroanalysis.
Main Methods:
- Fabrication of graphene paste electrodes by mixing graphene with mineral oil as a binder.
- Electrochemical characterization using SEM, TEM, XPS, and Raman spectroscopy.
- Testing with inner-sphere and outer-sphere redox probes (potassium ferrocyanide(II), hexaammine-ruthenium(III) chloride, hexachloroiridate(III)) and analytes (l-ascorbic acid, uric acid).
- Comparison with graphite paste electrodes.
Main Results:
- Graphene paste electrodes were successfully fabricated with a readily renewable surface.
- Electrochemical characterization revealed no significant differences in performance compared to graphite paste electrodes.
- No advantages were observed for using graphene over graphite in paste electrode fabrication for the tested electrochemical applications.
Conclusions:
- Graphene does not offer discernible electrochemical performance benefits over graphite in the fabrication of paste electrodes.
- The findings are important for electroanalysis, particularly for researchers seeking new electrode materials.
- Graphite paste electrodes remain a viable and effective option for portable, rapid, and accurate sensing.
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