论文标题
PEMFC阳极和阴极中的过氧化氢形成速率：湿度和温度的影响
Hydrogen Peroxide Formation Rates in a PEMFC Anode and Cathode: Effect of Humidity and Temperature
论文作者
论文摘要
质子交换膜（PEM）燃料电池阳极中的过氧化氢（H2O2）形成速率通过研究旋转环电极（RRDE）上的氧气还原反应（ORR），估计是湿度和温度的函数。通过将PT/Vulcan XC-72催化剂的膜沉积到磁盘上，并改变温度，溶解的O2浓度和盐酸酸度水平（HCLO4）来复制燃料电池条件。 HCLO4酸度与离子水的水活性相关，因此与燃料电池湿度相关。 H2O2的形成速率显示出对氧浓度和对水活性的正方形依赖性的线性依赖性。 ORR中的H2O2选择性与氧浓度无关，但随水活性的降低（即湿度降低）而增加。从不同温度下获得的数据估算了H2O2形成反应的潜在依赖活化能。
Hydrogen peroxide (H2O2) formation rates in a proton exchange membrane (PEM) fuel cell anode and cathode were estimated as a function of humidity and temperature by studying the oxygen reduction reaction (ORR) on a rotating ring disc electrode (RRDE). Fuel cell conditions were replicated by depositing a film of Pt/Vulcan XC-72 catalyst onto the disk and by varying the temperature, dissolved O2 concentration and the acidity levels in hydrochloric acid (HClO4). The HClO4 acidity was correlated to ionomer water activity and hence fuel cell humidity. The H2O2 formation rates showed a linear dependence on oxygen concentration and square dependence on water activity. The H2O2 selectivity in ORR was independent of oxygen concentration but increased with decrease in water activity (i.e., decreased humidity). Potential dependent activation energy for the H2O2 formation reaction was estimated from data obtained at different temperatures.
