氯化物熔体中镱离子在铁电极上的电还原  

Electroreduction of Yb(Ⅲ) Ion on the Fe Cathode in Molten Chloride

作　　者：刘冠昆[1] 童叶翔[1] 洪惠婵 杨绮琴 陈胜阳 

机构地区：[1]中山大学化学与化学工程学院物理化学研究所,广州510275

出　　处：《物理化学学报》1998年第5期463-466,共4页Acta Physico-Chimica Sinica

基　　金：广东省自然科学基金

摘　　要：The line scanning voltammetry was used to study the electrochemical reaction of Yb(Ⅲ) in NaCl-KCl equimolar mixture on the Fe cathode. It was found that the reduction of Yb(Ⅲ) to yb(Ⅱ ) was realized on Fe electrode in the first step. Yb(Ⅱ ) was then reduced and formed alloys with Fe. The diffusion coefficients of Yb(Ⅲ) and Yb(Ⅱ ) in NaCl-KCl were de-termined to be 2.0× 10-5cm2. s- 1 and l .1 × 10-5cm2’s- 1 at 760 ℃, respectively. The diffusion activation energy of Yb(Ⅲ ) was 66.0kJ ’mol-1.The line scanning voltammetry was used to study the electrochemical reaction of Yb(Ⅲ) in NaCl-KCl equimolar mixture on the Fe cathode. It was found that the reduction of Yb(Ⅲ) to yb(Ⅱ ) was realized on Fe electrode in the first step. Yb(Ⅱ ) was then reduced and formed alloys with Fe. The diffusion coefficients of Yb(Ⅲ) and Yb(Ⅱ ) in NaCl-KCl were de-termined to be 2.0× 10-5cm2. s- 1 and l .1 × 10-5cm2's- 1 at 760 ℃, respectively. The diffusion activation energy of Yb(Ⅲ ) was 66.0kJ 'mol-1.

关 键 词：镱离子 电还原 熔盐 镱铁合金 铁电极 氯化物 

分 类 号：O614.346[理学—无机化学] O646[理学—化学]