An increasing use of fuel cell electric vehicles involves the need to understand their behavior at low ambient temperatures as well as under cold‐start conditions. Here commercial 60 wt.% Pt/C catalyst (HiSPEC9100) was studied in the temperature range 0–20 °C using rotating disc electrode (RDE) setup and single cell inside a climate chamber. RDE measurements of oxygen reduction reaction (ORR) activity revealed decreasing activity with lower temperatures as well as activation energies and reaction mechanisms comparable to high temperature studies. Catalyst degradation was significantly lower at lower temperatures, which was confirmed by CO stripping. The increase of the specific ORR activity after degradation measurements is discussed in terms of morphological changes of the Pt particles. Single cell tests confirmed significant performance reduction at lower temperatures. Furthermore, measurements at different power densities were conducted to evaluate heating and flooding effects.

中文翻译：

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在室温和凝固点之间的PEM-燃料电池催化剂行为

越来越多地使用燃料电池电动汽车，需要了解其在低环境温度以及冷启动条件下的行为。在这里，使用旋转圆盘电极（RDE）装置和气候室内的单个电池，在0-20°C的温度范围内研究了商用60 wt。％Pt / C催化剂（HiSPEC9100）。氧还原反应（ORR）活性的RDE测量显示，与较低的温度以及与高温研究相当的活化能和反应机理，活性降低。在较低的温度下，催化剂的降解显着降低，这已通过CO汽提得到证实。根据Pt颗粒的形态变化，讨论了降解测量后比ORR活性的增加。单电池测试证实在较低温度下性能显着降低。此外，在不同的功率密度下进行了测量，以评估加热和溢流效果。