Abstract
C-sp2 (graphite) impurities are undesirable in synthetic diamond electrodes (C-sp3), because they can affect the electrochemical response. In this work, we demonstrate that C-sp3 surfaces can be activated successfully by applying an anodic current density corresponding to sufficiently high potential where the hydroxyl radicals (●OH) are generated. The effectiveness of this activation process was verified by Raman spectroscopy, X-ray diffraction, scanning electron microscopy, and cyclic voltammetry.
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Acknowledgments
The authors thank the Mexican Council of Science and Technology (CONACyT) for the financing granted for the implementation of this study through the Sector Research Fund for Education—Basic Science-4955 and the Joint Fund of the State Government of Veracruz Key-96313. The authors also thank Dr. Luis Miguel Apátiga Castro, as well as Dr. Eric Rivera Muñoz, Dra. Genoveva Hernández Padrón, and Alicia del Real López, from Center for Applied Physics and Advanced Technology (CFATA), for their support in the characterization of BDD during the different pretreatments. Alejandro Medel thanks CONACyT for the fellowship that it granted.
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Medel, A., Bustos, E., Apátiga, L.M. et al. Surface Activation of C-sp3 in Boron-Doped Diamond Electrode. Electrocatalysis 4, 189–195 (2013). https://doi.org/10.1007/s12678-013-0158-x
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DOI: https://doi.org/10.1007/s12678-013-0158-x