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Surface Treatment of Boron Doped Diamond by Atmospheric-Pressure Nitrogen Plasma Jet - Effects on the Electrochemical Characteristics

MetadataDetails
Publication Date2023-04-07
JournalElectrochemistry
AuthorsTaro Kinumoto, Toru TOMITA, Mai Sato, Miki Matsuoka, Ryuta Ichiki
InstitutionsOita University

An atmospheric-pressure nitrogen plasma jet (APN2PJ) treatment for conductive boron-doped diamond (BDD) electrode is reported for the first time. APN2PJ is a unique technique that can generate NH and nitrogen-related radicals at high density even under atmospheric pressure. These radicals attacked BDD, changing its surface morphology and introducing nitrogen doping as far as inner part of BDD. In addition, ā€œsedimentsā€ appeared on the surface after APN2PJ treatment. The specific capacitance of BDD was increased after APN2PJ treatment. Furthermore, a further increase in the specific capacity was observed after sonication of the treated samples, which might be related to the disappearance of these ā€œsedimentsā€.