کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
179902 | 459364 | 2011 | 4 صفحه PDF | دانلود رایگان |

The electrochemical reduction of the surface layer of gold oxide in sulfuric acid solutions has been investigated. Our interest in the problem arose in connection with the development and testing of an electrochemical measuring system with rotating gold disk-gold ring electrodes. With the help of the new system independent and dynamic potential programs can be applied simultaneously to the disk and the ring electrodes.By applying the “phase-shifted double cyclic voltammetry” method it could be shown that the reduction of the surface oxide layer of the polycrystalline gold disk immersed into sulfuric acid solutions is accompanied by the formation of soluble, electroreducible gold species which can be detected on the ring electrode.
Research Highlights
► Study of a rotating gold disk-gold ring system in sulfuric acid solutions.
► Measuring system for recording voltammograms simultaneously at the disk and the ring.
► Electroreducible species formed on the disk could be detected on the ring.
► TXRF and ICP-MS analysis showed the presence of dissolved gold in the solution.
► A soluble gold species was formed during the reduction of the surface Au-oxide layer.
Journal: Electrochemistry Communications - Volume 13, Issue 4, April 2011, Pages 378–381