ホモジナイザで気泡導入した液中プラズマによる炭素材料合成

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  • ホモジナイザ デ キホウ ドウニュウ シタ エキ チュウ プラズマ ニ ヨル タンソ ザイリョウ ゴウセイ

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Carbon materials have been widely studied as promising oxygen reduction reaction (ORR) catalysts to replace precious metal catalysts. Recently, synthesis of nitrogen-, boron-, and halogen- doped materials for oxygen reduction reaction has been studied using solution plasma processes. However, there has been a lack of knowledge on the synthesis of carbon materials when physical conditions changed, such as by adding microbubbles to the reaction field. In this study, carbon materials were synthesized with microbubbles added to the reaction field using an ultrasonic disperser (homogenizer), and their material properties and ORR performance were analyzed. Carbon materials were synthesized as carbon nanoparticles with amorphous structure. It was found to have a large number of micropores, which resulted in a large specific surface area of 402.98 m2/g. Electrochemical measurements confirmed that the two-electron transfer ORR pathway was the major reduction pathway, and the onset potential of ORR activity was as high as －0.083 V (vs. Ag/AgCl).

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