Bulletin of the American Physical Society
76th Annual Gaseous Electronics Conference
Volume 68, Number 9
Monday–Friday, October 9–13, 2023; Michigan League, Ann Arbor, Michigan
Session HT3: Plasma Nanotechnology
1:30 PM–3:30 PM,
Tuesday, October 10, 2023
Room: Michigan League, Michigan
Chair: Satoshi Hamaguchi, Osaka University, Japan
Abstract: HT3.00002 : Characterization of Ultrasonic Cavitation Plasma to Synthesize Carbon Catalysts for Oxygen Reduction Reaction*
1:45 PM–2:00 PM
Presenter:
Ryotaro Harakawa
(Tokyo Institute of Technology)
Authors:
Ryotaro Harakawa
(Tokyo Institute of Technology)
Nozomi Takeuchi
(Tokyo Institute of Technology)
Hidemasa Takana
(Tohoku University)
Oi Lun Li
(Pusan National University)
In cavitation plasma in xylene, two types of plasma were observed. One was a blue small plasma, while the other was an orange large plasma. The occurrence of these plasmas was determined by electrode gap length, cavitation intensity, and voltage settings. To characterize the two types of plasmas, optical emission spectroscopy (OES) measurements were conducted through a glass reactor using a spectrometer. The emissions from these plasmas exhibited distinct features, particularly emissions originating from C2 and CH, which are essential for carbon material synthesis from xylene. Additionally, emissions from hydrogen, utilized for the estimation of electron temperature and electron density, were also detected. Notably, there was an intense broad emission only from the orange plasma, indicating a substantial differentiation between the two plasmas.
*This work was carried out under the Collaborative Research Project of the Institute of Fluid Science, Tohoku University.
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