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本文采用连续脉冲技术,在观察无壁电解槽中电解质对碳电极湿润性的同时测量了两极间的电动势。研究结果表明,当石墨碳板作阳极时,随着石墨碳板上电位的升高,湿润角最初升高,尔后略有下降;但是当石墨碳板为阴极时,湿润角随碳板电位的降低而直线下降。实验发现,在0.4～1.6V的电位内,湿润角有一最大值,位于1.1V左右,此结果与双电层电容在此电位下有一最低点相对应,所以它相当于零电荷电位。上述研究结果与电位扫描图互为对照,进一步解释了当电极换向时的极化和湿润。
In this paper, continuous pulse technique was used to measure the electromotive force between the two electrodes while observing the electrolyte wettability of the carbon electrode in the non-wall electrolytic cell. The results show that when the graphite carbon plate is used as anode, the wetting angle initially increases with the increase of the potential of the graphite carbon plate, and then decreases slightly. However, when the graphite carbon plate is used as the cathode, the wetting angle varies with the carbon potential Reduce and straight down. The experiment found that at a potential of 0.4-1.6V, the wetting angle has a maximum value of about 1.1V, which corresponds to the lowest point of the electric double layer capacitor at this potential, so it corresponds to zero charge potential. The above results are in contrast with the potential scan, further explaining the polarization and wetting when the electrode commutated.