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http://dx.doi.org/10.5229/JKES.2008.11.4.313

Effect of Pt Particle Size on the Durability of PEMFC  

Min, Kyoung-Won (Korea Institute of Industrial Technology)
Kim, Hyun-Jong (Korea Institute of Industrial Technology)
Han, M.K. (Korea Institute of Industrial Technology)
U, Yu-Tae (Korea Institute of Industrial Technology)
Kim, Mok-Soon (Dept Mater. Sci. & Eng., Inha University)
Chu, Young-Hwan (KCC Central Research Institute)
Publication Information
Journal of the Korean Electrochemical Society / v.11, no.4, 2008 , pp. 313-318 More about this Journal
Abstract
The influence of the particle size of platinum(Pt) on the stability and activity was studied. The particle size of platinum was controlled in the range of $3.5{\sim}9\;nm$ by heat treatment of commercial Pt/C and confirmed by XRD and TEM. An accelerated degradation test was performed to evaluate the stability of platinum catalysts. Oxygen reduction reaction was monitored for the measurement of activity. As increasing the Pt particle size, the stability of Pt/C electrode was enhanced and the activity was reduced. It was confirmed that the stability of Pt/C electrode was in inverse proportion to the activity. PtCo/C alloy catalyst was used to improve the activity and stability of large-sized platinum particle. The maximum power density of commercial Pt/C was $507.6\;mV/cm^2$ and PtCo/C alloy catalyst was $585.8\;mV/cm^2$. The decrement of electrochemical surface area showed Pt/C(60%) and PtCo/C alloy catalyst(24%). It was possible to enhance both of stability and activity of catalyst by the combination of particle size control and alloying.
Keywords
PEMFC; Particle size control; Catalyst; Durability;
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Times Cited By KSCI : 2  (Citation Analysis)
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