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Electrochemical oxygen reduction reaction rate in polymer electrolyte fuel cell |
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| รหัสดีโอไอ | |
| Title | Electrochemical oxygen reduction reaction rate in polymer electrolyte fuel cell |
| Creator | 1. Motoaki Kawase 2. Hidaka Asonuma 3. Yusuke Nobuta 4. Miho Kageyama 5. Gen Inoue |
| Publisher | Joint Graduate School of Energy and Environment |
| Publication Year | 2557 |
| Keyword | Polymer electrolyte fuel cell, gas diffusion electrode, oxygen reduction reaction, kinetic analysis, modeling |
| Abstract | Since optimization of the catalyst layer structure is necessary for reducing the cost of polymer electrolyte fuel cell (PEFC), formulation of the oxygen reduction reaction (ORR) rate in the cathode of PEFC is highly required for carrying out the numerical simulation for the design purpose. The ORR rate was measured with reducing the catalyst layer thickness for lowering the mass transfer resistance to oxygen, proton, and electron. Dependencies of the ORR rate on the oxygen partial pressure, relative humidity, and cell voltage were analyzed. The rate was of the first order with respect to the oxygen partial pressure up to 220 kPa. The first-order reaction rate constant was an exponential function of the cathode electromotive force. The exponent and preexponential factors were different in high and low cathode electromotive force regions. These kinetic parameters were formulated as functions of relative humidity. It was found that the exponent and preexponential factors were in strong correlation regardless of the relative humidity but depending on the cathode electromotive force region. |
| ISBN | 978-616-92228-1-1 |
