Effects of Cl~- and F~- adsorption on Methanol Oxidation on Polycrystallien Platinum Electrode

摘要

The adsorption of anions on platinum electrode was determined by electrochemical impedance spectroscopy in H_2SO_4 solution. The resutls indicate that addition of Cl~- may increase adsorption capacitance largely, while F~- has little influence on adsorption caapcitance. The results of cyclic voltammetry (CV) show that the methanol oxidation peak current decreases slowly with increase the concentration of F~-, but drastically with the increase of Cl~- concentration.