Suppression of Potential Oscillations in PEFCs by Using Anode Catalyst Prepared by Polygonal Barrel-Sputtering Method
Suppression of Potential Oscillations in PEFCs by Using Anode Catalyst Prepared by Polygonal Barrel-Sputtering Method
复制标题
多边形桶溅射法制备阳极催化剂抑制PEFC中的电位振荡
作者：
M. Inoue;K. Hirakawa;M. Umeda;T.
在这项研究中，我们研究了在向聚合物电解质燃料电池注入含有大量CO的H_2气时发生的电位振荡的抑制。采用多角筒溅射法制备了碳载铂-Ru合金(Pt-Ru/C)样品。电化学测量是在1 N H_2SO_4电解液中进行的，H_2SO_4溶液中饱和的H_2气中含有1,000 ppm的CO。从测量中发现，所制备的铂-Ru/C样品表现出比商业样品更高的CO耐受性，因此，在所制备的样品的情况下，电位振荡发生的间隔略长。通过在制备的铂-Ru/C样品上溅射不同量的Ru制备了额外的样品，观察到随着Ru含量的增加，电势振荡的平均间隔增加。这一结果表明，在多边形桶溅射的情况下，Ru在抑制电位振荡方面起到了重要作用，并影响了Pt-Ru/C的CO容忍度。
In this study, we investigated the suppression of potential oscillations that occur while feeding H2gas including a large amount of CO to polymer electrolyte fuel cells. A carbon‐supported Pt–Ru alloy (Pt–Ru/C) sample was prepared by the polygonal barrel‐sputtering method. Electrochemical measurement was conducted in 1 N H2SO4electrolyte solution saturated with H2gas including CO of 1,000 ppm. From the measurement, it was found that the prepared Pt–Ru/C sample showed higher CO tolerance than a commercially available sample, and therefore, potential oscillations in the case of the prepared sample occurred for slightly longer intervals. Additional samples were prepared by sputtering different amounts of Ru on the prepared Pt–Ru/C sample, and it was observed that the average interval of potential oscillations increased with the amount of Ru. This result suggests that in the case of the polygonal barrel‐sputtering method, Ru plays an important role in suppressing potential oscillations and influences the CO tolerance of Pt–Ru/C.