共晶体系
锆
电化学
氧化还原
锆合金
材料科学
无机化学
冶金
化学
电极
物理化学
微观结构
作者
Liang Xu,Y. Xiao,Qian Xu,Anthonie van Sandwijk,Zhuo Zhao,Qiushi Song,Yanqing Cai,Yongxiang Yang
标识
DOI:10.1016/j.jnucmat.2017.03.028
摘要
Abstract In the present paper, a detailed study of the redox behavior of zirconium in the eutectic LiF-NaF system was carried out on an inert molybdenum electrode at 750 °C. Several transient electrochemical methods were used such as cyclic voltammetry, square wave voltammetry, chronopotentiometry, and open circuit voltammetry. The reduction of Zr (IV) was found to follow a two-step mechanism of Zr (IV)/Zr (II) and Zr (II)/Zr at the potentials of about −1.10 and −1.50 V versus Pt, respectively. The theoretical evaluations of the number of transferred electrons according to both cyclic voltammetry and square wave voltammetry further confirmed the Zr reduction mechanism. The estimations of Zr (IV) diffusion coefficient in the LiF-NaF eutectic melt at 750 °C through cyclic voltammetry and chronopotentiometry are in fair agreement, as to be approximately 1.13E-5 and 2.42E-5 cm 2 /s, respectively.
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