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Citation:
Xue Zuolin, Wang Fu, Cheng Fenging. ON THE ANODIC DISSOLUTION OF GOLD IN ACIDIC THIOUREA SOLUTIONS[J]. Chinese Journal of Applied Chemistry,
;1990, 7(4): 52-56.
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By means of linear potential sweep voltammetry and rotating disk electrode, togather with coulometric electrolysis, the anodic dissolution of gold in acidic thiourea solutions were studied. From the experimental results, it is proposed that the anodic dissolution of gold proceeds according to the following mechanism:Au+TU⇌Au(TU)ads (1) Au(TU)ads⇌Au(TU)ads++c (2) Au(TU)ads++TU→Au(TU)2+ (3) in which (3) is the rate-determining step. The existence of a maximum dissolution rate in the used potential range can be explained by this mechanism.
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Keywords:
- gold,
- thiourea,
- anodic dissolution
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