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A series of carbon supported electrocatalysts, Pt/C, , Pt‐Ru/C, and , were prepared by freeze drying and tested as Teflon‐bonded electrodes in 0.5 M in a stream of impure hydrogen containing 100 ppm of CO at 80°C. The first three catalysts were gradually poisoned and the performance was less than 100 mA/cm 2 at 200 mV vs. SHE. However, there was no change in the performance of the Teflon‐bonded electrode at 220 mA/cm 2 over a test period of 6 h.
Chen et al. (Sun,) studied this question.