Electrode process of La(III) in molten LiCl-KCl

Autor:	Ruixue Li, Lisheng Liu, Li Chang, Changshui Wang, Fanxing Gao, Yinggen Ouyang, Shangwen Chang, Jianhua Guo
Rok vydání:	2009
Předmět:	Chemistry Diffusion Analytical chemistry chemistry.chemical_element General Chemistry Electrochemistry Reference electrode Metal Electron transfer Geochemistry and Petrology visual_art Electrode visual_art.visual_art_medium Lanthanum Cyclic voltammetry
Zdroj:	Journal of Rare Earths. 27:986-990
ISSN:	1002-0721
DOI:	10.1016/s1002-0721(08)60375-0
Popis:	The electrode process of La(III) at Mo electrode in the molten LiCl-KCl for temperatures ranging from 683 K to 773 K was studied by cyclic voltammetry and chronopotentiometry, respectively. The results showed that in the molten LiCl-KCl, reduction of La(III) occurred in a step with a global exchange of three electrons. Cyclic voltammetry studies indicated that at a sweep rate lower than 0.2 V/s, the electroreduction of La(III) to lanthanum metal was reversible and controlled by diffusion of La(III). However, the process became under a mixed control of both diffusion and electron transfer when sweep rate exceeded 0.2 V/s. And an empirical temperature dependence of the diffusion coefficient of La(III) was proposed: ln D La(III) =7.742–1.441×10 4 / T . And the relation between the formal potential of La(III)/La versus Ag/AgCl reference electrode and temperature was described in the following equation: E θ' =–1.402–4.689×10 2 / T .
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3ad03239167b4b7bf66c0b122ff8841e https://doi.org/10.1016/s1002-0721(08)60375-0 Zobrazit plný text záznamu Full Text from ScienceDirect