摘要
利用旋转环－盘电极方法开结合循环伏安技术研究了磷酸溶液中亚硒酸的电化学还原机理．结果表明在磷酸溶液中亚硒酸的电化学还原过程即包括电化学反应，又有后续均相化学反应．在亚硒酸的电化学还原过程中有两种硒单质生成，兰色硒是由电化学反应生成，不能进一步被还原，具有电化学惰性．红色硒是由后续均相化学反应生成，可以进一步被还原，具有电化学活性．并对亚硒酸的电化学还原过程提出了一个比较完整。
In this paper the electrochemical reduction mechanism of selenious acid(H 2SeO 3) in phosphoric acid solution was studied by rotating ring-disc electrode and cyclic voltammetry techniques.The results showed that there existed not only electrochemical reactions,but also subsequent homogeneous chemical reaction in the electrochemical reduction of H 2SeO 3.In the electrochemical reduction of H 2SeO 3 were formed two kinds of elemental selenium(Se):blue selenium and red selenium.Blue Se was produced by electrochemical reaction and red Se by subsequent homogeneous chemical reaction.Blue Se could not be reduced further electrochemically and it was inactive electrochemically.Red Se could be reduced further electrochemically and it was active electrochemically.In addition,a complete and reasonable electrochemical reduction mechanism of H 2SeO 3 was proposed.
出处
《河南大学学报（自然科学版）》
CAS
1999年第1期33-38,共6页
Journal of Henan University:Natural Science
基金
国家自然科学基金
关键词
亚硒酸
电化学还原
磷酸溶液
环-盘电极法
rotating ring-disc electrode
selenious acid
electrochemical reduction
