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National Chung Hsing University Institutional Repository - NCHUIR > 工學院 > 化學工程學系所 > 依資料類型分類 > 期刊論文 >  Adsorption and Desorption of Bis-(3-sulfopropyl) Disulfide during Cu Electrodeposition and Stripping at Au Electrodes

Please use this identifier to cite or link to this item: http://nchuir.lib.nchu.edu.tw/handle/309270000/145505

標題: Adsorption and Desorption of Bis-(3-sulfopropyl) Disulfide during Cu Electrodeposition and Stripping at Au Electrodes
作者: Chiu, Yong-Da;Dow, Wei-Ping;Krug, Klaus;Liu, Yung-Fang;Lee, Yuh-Lang;Yau, Shueh-Lin
Contributors: Wei-Chun Wang
日期: 2012-03
Issue Date: 2013-07-02 10:08:46 (UTC+8)
摘要: The adsorption and desorption of bis-(3-sulfopropyl) disulfide (SPS) on Cu and Au
electrodes and its electrochemical effect on Cu deposition and dissolution were examined using cyclic
voltammetry stripping (CVS), field-emission scanning electron microscopy (FESEM), and X-ray
photoelectron spectroscopy (XPS). SPS dissociates into 3-mercapto-1-propanesulfonate when it is
contacted with Au and Cu electrodes, producing Cu(I)- and Au(I)-thiolate species. These thiolates
couple with chloride ions and promote not only the reduction of Cu2+ in Cu deposition but also the
oxidation of Cu0 to Cu+ in Cu stripping. During Cu electrodeposition on the SPS-modified Au
electrode, thiolates transfer from Au onto the Cu underpotential deposition (UPD) layer. The Cu UPD
layer stabilizes a large part of the transferred thiolates which subsequently is buried by the Cu
overpotential deposition (OPD) layer. The buried thiolates reappear on the Au electrode after the
copper deposit is electrochemically stripped off. A much smaller part of thiolates transfers to the top of
the Cu OPD layer. In contrast, when SPS preadsorbs on a Cu-coated Au electrode, almost all of the
adsorbed SPS leaves the Cu surface during Cu electrochemical stripping and does not return to the
uncovered Au surface. A reaction mechanism is proposed to explain these results.
Relation: Langmuir, Volume 28, Page(s) 14476−14487.
Appears in Collections:[依資料類型分類] 期刊論文

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