Kinetic parameters of the dissolution of gold in thiourea solutions

被引：0

作者：

Kozin L.F. ^{[1
]}

Berezhnoi E.O. ^{[2
]}

Bogdanova A.K. ^{[1
]}

机构：

[1] V. I. Vernadskii Institute of General and Inorganic Chemistry, National Academy of Sciences of Ukraine, 03142 Kyiv

[2] Institute of Applied Optics International Center, 04053 Kyiv

来源：

Theoretical and Experimental Chemistry | 2002年 / 38卷 / 6期

关键词：

Activation energies; Adsorption layers; Auger spectroscopy; Gold; Rate constants; Thiourea;

D O I：

10.1023/A:1022283921842

中图分类号：

学科分类号：

摘要：

The temperature dependence of the rate constants for the dissolution of gold in thiourea solutions was determined. The activation energies calculated suggest that the rate of gold dissolution is diffusion-controlled at 5-22°C but is kinetically-controlled at 25-60°C (Ea = 42.83 kJ/mol). Auger spectroscopy was used to study the composition of the surface adsorption layers and a mechanism for the passivation of the reactive surface during the gold dissolution process was proposed. ©2002 Plenum Publishing Corporation.

引用

页码：388 / 392

页数：4

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