An electrochemical and spectroelectrochemical study of the electrodeposition of Au from KAu(CN)2 solutions containing 4-cyanopyridine and cetylpyridinium chloride

被引：14

作者：

Bozzini, B ^{[1
]}

Fanigliulo, A ^{[1
]}

Mele, C ^{[1
]}

机构：

[1] Univ Lecce, INFM, Dipartimento Ingn Innovaz, I-73100 Lecce, Italy

来源：

TRANSACTIONS OF THE INSTITUTE OF METAL FINISHING | 2003年 / 81卷

关键词：

D O I：

10.1080/00202967.2003.11871491

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this paper we report an electrochemical and in-situ FT-IRRAS study of the cathodic and anodic behaviour of Au in neutral KAu(CN)2 solutions in the presence of organic substances which are of interest as hydrogen scavengers and cathodic depolarisers for Au and Au-alloy electrodeposition baths not containing free cyanide: 4-cyanopyridine and cetylpyridinium chloride. The electrochemical behaviour is studied by cyclic voltammetry, differential capacitance and electrochemical impedance spectroscopy. Some relationships between the nature of the organic additives and the electrodic behaviour of Au(CN)(2)(-) during the electrodeposition of Au are highlighted Details of the surface species forming under cathodic and anodic polarisation in the presence of the additives are given. The formation of different kinds of Au-CN films at the electrode has been recognised and the effects of the additives on their stability has been assessed.

引用

页码：59 / 67

页数：9

共 46 条

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[42] Gold(III) preconcentration from acid solutions by cadmium diisopropyldithiocarbamate: Gold(III)-binding species, supramolecular structure, and thermal properties of the heteropolynuclear complex ([Au{S2CN(iso-C3H7)2}2]2[CdCl4] · 1/2C3H6O)n
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[44] Binding of Gold(III) from Solutions by Tetranuclear Lead(II) Dipropyldithiocarbamate [Pb4{S2CN(C3H7)2}8] and Chemisorption Synthesis of the Double Ionic Polymer Complex ([Au{S2CN(C3H7)2}2][PbCl3] • 0.5CH3-C6H5)n: Heteronuclear (13C,15N) CP-MAS NMR, Structural Organization, and Construction Principles of Cationic and Anionic Polymer Chains
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[45] Binding of Gold(III) from Solutions by Tetranuclear Lead(II) Dipropyldithiocarbamate [Pb4{S2CN(C3H7)2}8] and Chemisorption Synthesis of the Double Ionic Polymer Complex ([Au{S2CN(C3H7)2}2][PbCl3] · 0.5CH3–C6H5)n: Heteronuclear (13C,15N) CP-MAS NMR, Structural Organization, and Construction Principles of Cationic and Anionic Polymer Chains
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[46] Synthesis of functionalized cobaltacarboranes based on the closo-[(1,2-C2B9H11)2-3,3′-Co]- ion bearing polydentate ligands for separation of M3+ cations from nuclear waste solutions.: Electrochemical and liquid-liquid extraction study of selective transfer of M3+ metal cations to an organic phase.: Molecular structure of the closo-[(8-(2-CH3O-C5H4-O)-(CH2CH2O)2-1,2-C2B9H10)-(1′,2′-C2B9H11)-3,3′-Co]Na determined by X-ray diffraction analysis
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