当前位置: X-MOL 学术Mater. Chem. Phys. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Cyanide-free silver immersion deposition involving 3-mercapto-1-propanesulfonic acid for copper finishing
Materials Chemistry and Physics ( IF 4.6 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.matchemphys.2020.122671
Zhiqiang Lai , Chong Wang , Qingguo Chen , Shouxu Wang , Yan Hong , Wei He , Yuanming Chen , Xiaofeng Jin , Yingguo Tao , Xiaoyan Lu

Abstract In this work, in the place of cyanide, a novel alternative of silver ligand, 3-mercapto-1-propanesulfonic acid (MPS), is introduced for environmentally friendly copper finishing by a galvanic replacement reaction. The bright yellow and transparent MPS-Ag solution exhibits high chemical and thermal stability. Cyclic Voltammetry (CV) plots prove the coordination ability of MPS to Ag+ is much stronger than that of ammonia in alkaline solution. By applying different temperatures and solution compositions, various silver deposits were prepared by immersion of silver on copper surface in solutions with MPS. The obtained samples were subjected to morphological and chemical characterizations to analyze the composition of corresponding silver deposits. Experimental results show that, the size of the deposited silver particles is tunable by controlling the concentration of Cl− and temperature. Additionally, corrosion tests based on Tafel extrapolation method validate the favorable performance of the corrosion resistance and low coating porosity of the silver deposits. It was observed that, in the absence of Cu+, copper alone cannot reduce the Ag+ in MPS solutions, indicating that Cu+ is the critical component in the reactions involving MPS-assisted replacement. Combined with the experimental output, quantum chemical calculations based on Density Functional Theory (DFT) were employed to explain the mechanism of this particular chemical reaction.

中文翻译:

涉及 3-巯基-1-丙磺酸的无氰银浸镀沉积用于铜精加工

摘要 在这项工作中,代替氰化物,引入了一种新型的银配体替代物 3-巯基-1-丙磺酸 (MPS),用于通过电置换反应对铜进行环保整理。亮黄色透明的 MPS-Ag 溶液具有很高的化学和热稳定性。循环伏安 (CV) 图证明 MPS 与 Ag+ 的配位能力远强于碱性溶液中的氨。通过应用不同的温度和溶液组成,通过将银浸入铜表面的 MPS 溶液制备了各种银沉积物。对获得的样品进行形态和化学表征,以分析相应银沉积物的组成。实验结果表明,沉积银颗粒的大小可通过控制 Cl- 的浓度和温度进行调节。此外,基于 Tafel 外推法的腐蚀测试验证了银沉积物的良好耐腐蚀性和低涂层孔隙率。据观察,在没有 Cu+ 的情况下,单独的铜不能还原 MPS 溶液中的 Ag+,这表明 Cu+ 是涉及 MPS 辅助置换反应的关键成分。结合实验输出,采用基于密度泛函理论(DFT)的量子化学计算来解释这种特定化学反应的机理。基于 Tafel 外推法的腐蚀试验验证了银沉积物具有良好的耐腐蚀性能和低涂层孔隙率。据观察,在没有 Cu+ 的情况下,单独的铜不能还原 MPS 溶液中的 Ag+,这表明 Cu+ 是涉及 MPS 辅助置换反应的关键成分。结合实验输出,采用基于密度泛函理论(DFT)的量子化学计算来解释这种特定化学反应的机理。基于 Tafel 外推法的腐蚀试验验证了银沉积物具有良好的耐腐蚀性能和低涂层孔隙率。据观察,在没有 Cu+ 的情况下,单独的铜不能还原 MPS 溶液中的 Ag+,这表明 Cu+ 是涉及 MPS 辅助置换反应的关键成分。结合实验输出,采用基于密度泛函理论(DFT)的量子化学计算来解释这种特定化学反应的机理。
更新日期:2020-04-01
down
wechat
bug