New pathway for the controllable synthesis of gold nanoparticles on platinum substrates and their derivatives of polypyrrole/gold nanocomposites

Yu Chuan Liu, Chung Chin Yu

研究成果: 雜誌貢獻文章

7 引文 斯高帕斯(Scopus)

摘要

The synthesis of gold nanoparticles with controllable particle sizes and densities on platinum substrates was first developed by sonoelectrochemical methods in this study. First, an Au substrate was cycled in a deoxygenated aqueous solution containing 0.1 M HCl from -0.28 to +1.22 V vs. Ag/AgCl at 500 mV/s with different scans. The durations at the cathodic and anodic vertexes are 10 and 5 s, respectively. After that Au-containing complexes were found existing in this aqueous solution. Subsequently, the Au working electrode was immediately replaced by a Pt electrode and different cathodic overpotentials and reduction time were employed under controlled sonication to synthesize Au nanoparticles on the Pt electrode. Then pyrrole (Py) monomers were encouragingly found to be autopolymerized to form polypyrrole (PPy)/Au nanocomposites on the Pt substrate due to the electrochemical activity of some unreduced species of the positively charged Au-containing complexes, which were incorporated into the deposited Au nanoparticles during the sonoelectrochemical reduction in a specific condition.

原文英語
頁(從 - 到)206-213
頁數8
期刊Journal of Electroanalytical Chemistry
585
發行號2
DOIs
出版狀態已發佈 - 十一月 15 2005
對外發佈Yes

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

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