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用循环伏安法、计时库仑法研究了Br-在不同电极上,以及不同浓度与不同pH值时的电氧化性质.测定了Br-在1mol/LH2SO4介质中的扩散系数D和标准电极反应速度常数k°.实验结果表明Br-在Pt上的反应速度常数要比石墨电极上大一个数量级.根据不同实验条件的循环伏安图,提出了Br-电氧化的可能机理.
Cyclic voltammetry and chronometric coulometry were used to investigate the electrooxidation properties of Br-on different electrodes and at different concentrations and pH values. The diffusion coefficient D of Br- in 1 mol / LH 2 SO 4 medium and the standard electrode reaction rate constant k ° were measured. The experimental results show that the reaction rate constant of Br- on Pt is one order of magnitude larger than that of graphite electrode. According to the cyclic voltammograms of different experimental conditions, the possible mechanism of Br-electrooxidation was proposed.