Study of electrochemical redox of gold for refining in non-aqueous electrolyte

The electrorefining of gold by simple electrolysis was investigated in the ionic liquid, 1-ethyl-3-methyl-imidazolium bis (trifluoromethanesulfonyl)imide (EMIMTFSI) with titanium tetrachloride (TiCl 4 ) used as a supporting electrolyte at room temperature. From the cyclic voltammetry results, optima...

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Veröffentlicht in:International journal of precision engineering and manufacturing 2015-06, Vol.16 (7), p.1229-1232
Hauptverfasser: Lee, Jae-O, Park, Gwangwon, Park, Jesik, Cho, Youngju, Lee, Churl Kyoung
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Sprache:eng
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Zusammenfassung:The electrorefining of gold by simple electrolysis was investigated in the ionic liquid, 1-ethyl-3-methyl-imidazolium bis (trifluoromethanesulfonyl)imide (EMIMTFSI) with titanium tetrachloride (TiCl 4 ) used as a supporting electrolyte at room temperature. From the cyclic voltammetry results, optimal electrorefining conditions were found for selective dissolution of gold from an anode and for selective reduction on a cathode under potentiostatic conditions, in which is able to obtain pure gold on a cathode surface. The composition, crystal structure, and morphology of pure gold were confirmed by X-ray diffraction and scanning electron microscopy with energy-dispersive spectroscopy. The electrodeposited gold was uniformly distributed on the platinum electrode surface without any impurities by non-aqueous electrolysis at room temperature.
ISSN:2234-7593
2005-4602
DOI:10.1007/s12541-015-0159-1