Electrodeposition of rhenium from acidic solution
HONG Biao1, 2, WANG You-bin1, 2, LI Feng2, WEI Yue-zhou1, 2, Toyohisa FUJITA1, 2
（1. Guangxi Key Laboratory of Processing for Non-ferrous Metal and Featured Materials, Guangxi University, Nanning 530004, China;2. School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China）
Abstract:The electrodeposition of rhenium from acidic solution was studied by cyclic voltammetry, potentiostatic electrodeposition and electrochemical quartz microcrystal balance (EQCM). The results show that metal rhenium is difficult to be reduced from near neutral solutions (pH=6); the electrodeposition product contains rhenium oxide (ReO3) from solutions with low acidity (pH=3); In solutions with high acidity (pH=1), the electrodeposition product is metallic rhenium, increasing the concentration of can promote the electrodeposition of rhenium, while there are obvious cracks in the morphology of metal rhenium. The electrodeposition potential of rhenium is determined to be -0.68 V in solutions containing 1.0 mmol/L (pH=1). Current efficiency for different conditions is up to 5.62%, obtained by potentiostatic electrodeposition.
Key words: rhenium; electrodeposition; current efficiency; electrochemical quartz microcrystal balance