【摘要】 高温聚合物电解质膜燃料电池（HT-PEMFC）通常以含N₂、CO、CO₂等非氢组分的重整氢气作为燃料，而非氢组分的存在使得电池性能大幅下降、稳定性变差。通过极化分析、电化学阻抗谱等手段研究了不同组分与浓度的N₂、CO对HT-PEMFC性能的影响。结果表明，N₂单独存在时的稀释效应增加了物质传输阻抗，而CO单独存在时会毒化电催化剂，增加氢氧化反应（HOR）电荷转移阻抗。在惰性稀释组分和毒化组分共同存在时，膜电极性能损失高于它们单独存在时的加和。该现象源于在较高的H₂传质阻力条件下，H₂与CO的竞争吸附反应导致的毒化加剧。本研究为HT-PEMFC膜电极的设计优化奠定了基础，并为电堆高效可靠性运行提供指导。更多还原

【Abstract】 High temperature polymer electrolyte membrane fuel cells（HT-PEMFC） usually use reformed hydrogen containing N₂, CO, CO₂ and other non-hydrogen components as fuel. The existence of non-hydrogen components greatly reduces the performance and stability of the HT-PEMFC. The effects of different components and concentrations of N₂ and CO on the performance of HT-PEMFC were investigated by means of polarization analysis and electrochemical impedance spectroscopy. The results show that the dilution effect of individual N₂ increases the mass transfer impedance, while individual CO poisons the electrocatalyst and increases the charge transfer impedance. When the inert diluent component and the poisoning component coexist, the performance loss of the membrane electrode is higher than the sum of the individual presence. The phenomenon stems from the intensified poisoning caused by the competitive adsorption reaction of H₂ and CO under high H₂ mass transfer resistance. This work lays a foundation for the design optimization of HT-PEMFC membrane electrodes and provides a guidance for the efficient and reliable operation of the stack.更多还原