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American Chemical Society, Journal of Physical Chemistry C, 21(113), p. 9224-9229, 2009

DOI: 10.1021/jp809761f

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Electrochemical and in Situ SERS Studies on the Adsorption of 2-Hydroxypyridine and Polyethyleneimine during Silver Electroplating

Journal article published in 2009 by Zhi-Bin（Fuzhou Univ Dept Chem） Lin, 任斌, 毛秉伟, 田中群, Jing-Hua Tian, Bu-Gao（Fuzhou Univ Dept Chem） Xie, Yong-An Tang, Jian-Jun（Fuzhou Univ Dept Chem） Sun, Guo-Nan Chen, Bin（Fuzhou Univ Dept Chem） Ren, Bing-Wei Mao, Zhong-Qun Tian ORCID
This paper was not found in any repository; the policy of its publisher is unknown or unclear.
This paper was not found in any repository; the policy of its publisher is unknown or unclear.

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Abstract

In this paper, 2-hydroxypyridine (2-HP) and polyethyleneimine (PEI) were selected as ligand and additive, respectively, in a cyanide-free silver electroplating bath. Adsorption behaviors of 2-HP and PEI at silver electrodes were investigated by means of potential-dependent surface-enhanced Raman spectroscopy (SERS). The adsorption configuration variations of 2-HP and PEI at the silver surface with the negative shift of potential were discussed according to the SERS analysis. The possible effect of 2-HP and PEI on the silver electroplating process was also proposed. In the silver electroplating process, the SERS signal variations of 2-HP with the negative shift of potential were mainly due to the deposits' morphology change. In the presence of PEI, fine grains and smoother surfaces are observed from the images of atomic force microscopy of the silver deposits. ; National Science Foundation of China [90407019, 20775015, 20735002]