中文摘要：

质子交换膜燃料电池的商业化应用迫切要求降低其Pt载量.本文通过Pt/C氧还原电极的动力学模型计算,研究了Pt/C电极中的氧分布、生成电流以及满足实际应用的最小Pt载量.结果表明,燃料电池Pt/C电极,阴极产生严重浓差极化的催化层厚度为40μm;功率密度达到1.4 W·cm-2（2.1 A·cm-2@0.67 V）的电池性能需要3μm左右的Pt/C阴极催化层,阴极Pt载量为0.122 mg·cm-2,即可使膜电极的阴极铂用量低于0.087 g·k W-1.

英文摘要：

It is an urgent need to reduce the Pt loading in electrode for practical fuel cell applications worldwide. Herein, we t heoretically investigate the oxygen distribution, generated current, and minimum Pt loading of Pt/C electrode for practical applications based on kinetic model of oxygen reduction reaction. The results indicate that with increasing electrode effective thickness to40 μm, serious concentration polarization is expected for Pt/C electrode. To generate a power density of 1.4 W·cm-2（2.1 A·cm-2@0.67 V） for fuel cell, the cathode catalyst layer thickness in PEMFC should be as thin as 3 μm. The minimum Pt loading will reach0.122 mg·cm-2, which can reduce the amount of Pt to 0.087 g·k W-1 in PEMFC cathode.