【摘要】 在应用于电化学研究时,玻碳电极需要在每次实验前进行预处理,以改善其电化学响应的重现性,打磨程度对化学响应有不同的影响。分别使用1000～5000目的金相砂纸和Al₂O₃抛光粉对玻碳电极直径分别为3、4、5 mm的电极进行物理砂磨预处理,然后在0.2 M KCl和1 mM K₃Fe（CN）₆溶液中测试其循环伏安,进一步研究了研磨程度（次数）对玻碳电极的电极性能存在的影响。实验结果表明:电极打磨得越精细玻碳电极的峰电位差越接近可实验值（△φ=80～90 mV）;活化后的玻碳电极较于活化前其电极的峰电位差更接近理论值（△φ=64 mV）。更多还原

【Abstract】 When applied to electrochemical research, the glassy carbon electrode needs to be pretreated before each experiment. To improve the reproducibility of its electrochemical response, the degree of sanding has a different effect on the chemical response. The glassy carbon electrodes with diameters of 3, 4, 5 mm were pretreated by physical sanding with 1000～5000 mesh metallographic sandpaper and Al₂O₃ polishing powder respectively. The cyclic voltammetry of glassy carbon electrodes was measured in 0.2 M KCl and 1 mM K₃Fe（CN）₆ solutions. The effect of grinding degree（times） on the performance of glassy carbon electrode was studied. The experimental results showed that the finer the glassy carbon electrode was polished, the closer the difference of peak potential was to the experimental value（=80～90 mV）; the difference of peak potential of activated glassy carbon electrode was closer to the theoretical value（=64 mV） than that of activated glassy carbon electrode.更多还原