Insights into the Electrochemistry of the Deposition of Boron from KCl-KF-NaBF4 Melt

• Main Author: Pala,Rahul
• Publication Date: 2014
• Other Authors: Anthonysamy,S.
• Format: Article
• Language: eng
• Source: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Download full: http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042014000600004
• topic: Sodium fluoroborate; Cyclic voltammetry; Chronoamperometry; Diffusion coefficient; Melt

Electrochemical reduction of boron from boron containing fluoroborate species present in KCl (81.54 mol%)-KF (18.45 mol%)-NaBF4 (1.67 × 10-4 mol cm-3) melt on a platinum electrode was studied by cyclic voltammetry and chronoamperometry. These studies were carried out over the temperature range 1073 - 1123 K. Boron-containing electroactive species is shown to reduce quasi-reversibly at low scan rates (v < 0.1 V s-1) and irreversibly at higher scan rates (v &gt; 0.1 V s-1) through a single-step three-electron process (B(III) + 3e- → B). The transfer and diffusion coefficients of the electroactive species were measured for sodium fluoroborate in KCl-KF melt over the temperature range 1073 - 1123 K.