alexa Characterization Of Carbon Supported Pt Nanocatalysts Generated By Coaxial Pulse Arc Plasma Deposition | 68259
ISSN: 2161-0398

Journal of Physical Chemistry & Biophysics
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3rd International Conference on Electrochemistry

Yoshiaki Agawa, Hironobu Araki, Hiroyuki Tanaka and Satoshi Tominaka
Advance Riko Inc., Japan
NIMS Japan
Posters & Accepted Abstracts: J Phys Chem Biophys
DOI: 10.4172/2161-0398-C1-020
Abstract
Coaxial arc plasma deposition source (CAOD) has generated the catalysts for fuel cells, exhaust gas and photo catalysts by forming metal plasma and depositing them uniformity onto powders as being catalyst supports. Especially for fuel cell catalysts, 5 wt% Pt/C catalysts generated by CAPD got higher catalytic activity than commercial 20 wt%, 5 wt% Pt/C catalysts with MOR and ORR. We made the evaluation of electrochemical property and morphological change by setting its supporting rate as 8.8 wt% and also compared to that of TEC10E50E. We generated Pt/C catalyst by using CAPD, which a large amount of current flowed to metals as catalyst and generated the metal plasmas, and supported them onto carriers (carbon). We used SEM and TEM for morphological characteristics observation and made the evaluation of electrochemical property (ORR measurement) with 0.5M H2SO4 as electrolyte and set the temperature at 20ÂșC. Scan rate was set at 10 mV/s and the counting of reduction electrons has been done with RDE and RRDE. From morphological observations and results obtained by using SEM and TEM, it was observed that there was not much difference between the amount of Pt/C catalysts generated by CAPD and that of nano-particles on the surface of carbon by TEC10E50E. Specific activities by CAPD showed approximately 2 times higher value than that of electrochemistry. Their electrochemistry specific surface area was same level and mass activities by CAPD were 2 times higher value than that of TEC10E50E. However, we considered that the number of reduction electrons is smaller than 4 because there are some areas without platinum particles and H2O2 were formed on the surface of the carbon. We could recognize it with SEM observation as well. The results showed that the supporting method needs to improve in order to deposit platinum nano-particles uniformly in future
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