作者: Ruichun Jiang , H. Russell Kunz , James M. Fenton
DOI: 10.1149/1.1928067
关键词:
摘要: Electrochemical impedance spectroscopy (EIS) of the electrochemical oxidation H 2 and /CO mixtures on proton exchange membrane fuel cell anode (Pt-Ru/C or Pt/C electrocatalysts) was performed at higher temperature (T c e l > 100°C) ambient pressure. Anode polarization studies were also conducted with same mixture-fed streams. Both provide information mechanism mixtures. The spectra are presented compared various CO concentrations (0-500 ppm, 1 2%), temperatures (80-120°C), relative humidity conditions (35-100%), as well different dc bias potentials for characterizing tolerance electrocatalysts. poisoning is alleviated by increasing temperature, plays a strong role in EIS polarization. spectrum poisoned strongly dependent potential. Under certain potential conditions, pseudoinductive behavior appears complex plots, corresponding to onset indicated from