酒石酸對碲化鉍銻溶液再循環伏安下之影響

The Effect of Tartaric Acid on Cyclic Voltammetry Analysis of Bismuth Antimony Telluride Aqueous System

循環伏安檢測可分析溶液中物種的還原氧化特性，本實驗藉由此方法研究碲化鉍銻水溶液中單獨離子與混和溶液的氧化還原行為，以及添加酒石酸錯合劑後對電化學性質的影響。酒石酸為增加銻離子於水溶液中溶解度必須的錯合劑，但添加過多的酒石酸會造成銻離子的還原變得困難且還原電流下降，而酒石酸對於鉍離子與碲離子則無明顯影響。二元與三元混和溶液的還原皆比單成分離子來的容易，說明此系統存在過電位電鍍的現象，三元溶液呈現兩個還原峰，第一個可對應到碲化鉍的還原，第二個為碲化銻的還原。

The redox properties of bismuth antimony telluride solutions, including the solely component, the mixed solution, and the effect of tartaric acid addition, were analyzed via cyclic voltammetry in this study. Tartaric acid can improve the solubility of SbIII in solutions, however, due to the strong complexing, too much tartaric acid results in reducing the reduction potential and lowering the reduction current of SbIII. The reduction potential of mixed solutions was more positive than solely component solutions owing to underpotential deposition. Ternary solution shows two reduction peaks in cyclic voltammogram, the first peak and the second peak can correspond to the reduction of bismuth telluride and antimony telluride, respectively.