• 作者： Chang, Yu-Chi; Prentice, Geoffrey
• 中文摘要： 本文利用旋轉圓環-圓盤電極深入探討鋅在含有矽酸鹽的氫氧化鉀溶液中於預鈍化區的電化學特徵程序。基於慢速線性電位掃描、交流阻抗、Gorbachev溫度-動力法及收集效率等的測量結果,推知矽酸鹽會抑制溶解反應,並引入不可逆性。鋅的電化學溶解支配過程隨著所添加矽酸鹽濃度的增加,漸趨於以擴散控制為主的模式。實驗數據亦示明在第一及第二峰區的溶解程序係為混合控制模式,且矽酸鹽可能干擾電極過程動力學。
• 英文摘要： The electrochemical characteristics of zinc electrodes in potassium hydroxide solutions containing sodium metasilicate in the prepassive region were studied using the rotating ring-disk technique. Slow linear potential sweeps, impedance spectra, Gorbachev's temperature-kinetic method, and collection efficiency measurements were employed to examine the processes involved in the electrode reactions. It was found that the dissolution reaction was inhibited by the addition of silicate. The presence of silicate introduced additional irreversibility into the electrode processes and the controlling mechanism gradually shifted toward a more diffusion-controlled mode as the silicate concentration increased. Experimental data revealed that the electrode processes at the first and the second peaks are mixed control kinetics and that sodium metasilicate may interfere with the electrode kinetics.
• 中文關鍵字： 鋅; 矽酸鹽; 陽極溶解; 鹼性電解質; 線性電位掃描; 交流阻抗
• 英文關鍵字： Zinc; Silicate; Anodic Dissolution; Alkaline Electrolyte; Linear Potential Sweep; Ac Impedance