Effects of Polyamidoamine Dendrimers on the Catalytic Layers of a Membrane Electrode Assembly in Fuel Cells
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Lee Jin Hwa
(Department of Applied Chemistry, Sejong University)
Won Jongok (Department of Applied Chemistry, Sejong University) Oh In Hwan (Korea Institute of Science and Technology) Ha Heung Yong (Korea Institute of Science and Technology) Cho Eun Ae (Korea Institute of Science and Technology) Kang Yong Soo (Department of Chemical Engineering, Hanyang University) |
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The charge of the hydrogen desorption peak was 70.3 mC/ cm^2. The average diameter of the Pt particles in 20% E-TEK catalyst is about 2 nm, and the density of platinum is 21.4 g cm^-2. Assuming a charge of 0.21 mC cm^-2 for the surface of Pt, from the charge of the hydrogen desorption peak (70.3 mC/cm^2), the electrochemical surface area is calculated to be 47.8 m^2 g^-1. By comparison with the surface area obtained from the platinum particle size, the utilization of Pt particles can be calculated as: (47.8/140) |
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