腺嘌呤电氧化反应特性的研究

通过循环伏安技术对腺嘌呤在玻碳电极上的吸附现象进行了研究 .利用伏安响应数据 ,对电活性质粒弱吸附进行了定性判断 ,结果表明 ,腺嘌呤在玻碳电极上发生了弱吸附 ,电氧化的主要影响因素是酸度、本体浓度以及扫描速率 .

玻碳电极表面氧化物种的电化学及光电子能谱研究

利用电化学及光电子能谱方法对玻碳电极表面氧化物种进行了表征，实验结果表明：玻碳电极的“活化过程”与电极的析氧过程紧密相关。表面氧化物种的形成是电化学与化学氧化共同作用的结果，表面氧化物种的组成与“活化”电位有明显的依赖关系。

Electrooxidation Mechanism of Methanol at Pt-Ru Catalyst Modified GC Electrode in Electrolytes with Different pH Using Electrochemical and SERS Techniques

The electrochemical and in-situ surface-enhanced Raman spectroscopy （SERS） techniques were used to investigate the electrooxidation behavior of methanol in acidic, neutral and alkaline media at a Pt-Ru nanoparticle modified glassy carbon （Pt-Ru/GC） electrode. The results showed that methanol could be dissociated spontaneously at the Pt-Ru/GC electrode to produce a strongly adsorbed intermediate, CO. It was found that CO could be oxidized more easily in the alkaline medium than in the acidic and neutral media. The peak potential of methanol oxidation was shifted from 0.663 and 0.708 V in the acidic and neutral media to -0.030 V in the alkaline medium, which is due to that the adsorption strength of CO on the Pt surface in the alkaline medium is weaker than that in the acidic and neutral media. The final product of the methanol oxidation is CO2. However, in the alkaline medium, CO2 produced would form CO3^2- and HCO3^- resulting in the decrease in the alkaline concentration and then in the decrease in the performance of DMFC. Therefore, the performance of the alkaline DMFC is not Stable.