Communication—A Mechanistic Study on Electrodeposition of Rhenium from Acidic Solution of Ammonium Perrhenate. Issue 13 (1st January 2017)

• Record Type: Journal Article
• Authors: Cao, Huazhen; Chai, Dagan; Wu, Liankui; Zheng, Guoqu
• Is Part Of: Journal of the Electrochemical Society. Volume 164:Issue 13(2017)
• Page Start: D825
• Page End: D827
• Publication Date: 2017-01-01
• Subjects: intermediates -- Rhenium electrodeposition -- thermodynamic analysis; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0871713jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : The electroreduction mechanism of ReO4 − in acidic solution is investigated intensively via experiments and thermodynamic analysis. High acidity and low ReO4 − concentration are the advantageous conditions to fabricate metallic rhenium, while under other conditions only small amount of rhenium oxides can be obtained. The reduction of ReO4 − to metallic Re is a multi-step process involving the successive reduction of intermediates. When there is no enough hydrion or the rhenium concentration exceeds a certain value, it is apt to produce a detrimental intermediate ReO2, which will benefit the hydrogen evolution reaction and seriously impede the further reduction of low-valent intermediates.