The Activity Influence of Isopropyl Alcohol for Flat Plant Pt and Pt/C Electrode

摘要

Pt , as a precious metal, is an important component of fuel cell catalyst, however the impurities in polymer electrolyte membrane fuel cell(PEMFC) has a great influence on the electrochemical activity. This paper studies the electrochemical activity influence of isopropyl alcohol(IPA) on a flat plate Pt and Pt/C electrodes by means of cyclic voltammograms and oxygen reduction test methods, the influence of the research results show that the addition of isopropyl alcohol will not change the stripping potentials of hydrogen, but it will obviously block the absorption of proton at the H_(ads) potentials,and the biggest oxidation current on the Pt/C electrode was larger than that on the flat plate Pt electrode; we also find that the present of IPA reduces the limit current density of the plate Pt electrode, thus further influence on the performance of the catalyst in PEMFC.