Investigations of triphenyl phosphate and bis-(2-ethylhexyl) phosphate self-assembled films on iron surface using electrochemical methods, Fourier transform infrared spectroscopy, and molecular simulations

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	Investigations of triphenyl phosphate and bis-(2-ethylhexyl) phosphate self-assembled films on iron surface using electrochemical methods, Fourier transform infrared spectroscopy, and molecular simulations
	W. J. Guo; S. H. Chen; Y. Y. Feng; C. J. Yang
	2007
发表期刊	Journal of Physical Chemistry C
ISSN	1932-7447
卷号	111 期号:7 页码:3109-3115
摘要	The protection behaviors of two new phosphate self-assembled films, triphenyl phosphate (TPP) and bis-(2-ethylhexyl) phosphate (BEP), against the corrosion of iron in 0.5 M H2SO4 were investigated using the electrochemical impedance spectroscopy (EIS), polarization curves, Fourier transform infrared (FT-IR) spectroscopy, and molecular simulations. The polarization curves showed a decrease in corrosion current density for the electrode covered with phosphates. Impedance spectra demonstrated that the charge-transfer resistance (R-ct) of the electrode covered with phosphate was greater than that of the naked iron electrode. Results show that TPP molecules can adsorb on the iron surface quickly in a short time and that the coverage (theta) of the film will get to the maximum in 4 h. Subsequently, the amount of TPP molecules on the iron surface remains constant, while theta of BEP on the iron surface increases with the immersion time in 24 h. FT-IR spectroscopy was applied for the surface analysis and confirmed the adsorption of phosphates on the iron surface by monitoring the functional group peaks of the compounds. Molecular simulations were performed to illustrate the adsorption process at a molecule level and to provide some theoretical information for our experiment.
部门归属	shandong univ, sch chem & chem engn, shandong 250100, peoples r china. state key lab corros & protect met, shenyang 110015, peoples r china.;chen, sh (reprint author), shandong univ, sch chem & chem engn, shandong 250100, peoples r china;shchen@sdu.edu.cn
关键词	2-dimensional Polymer-films Corrosion Inhibition Alkanethiol Monolayers Copper Corrosion Schiff-base Gold Protection Behavior Steel Acids
URL	查看原文
WOS记录号	WOS:000245005800039
引用统计	被引频次：48[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33561
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. J. Guo,S. H. Chen,Y. Y. Feng,et al. Investigations of triphenyl phosphate and bis-(2-ethylhexyl) phosphate self-assembled films on iron surface using electrochemical methods, Fourier transform infrared spectroscopy, and molecular simulations[J]. Journal of Physical Chemistry C,2007,111(7):3109-3115.
APA	W. J. Guo,S. H. Chen,Y. Y. Feng,&C. J. Yang.(2007).Investigations of triphenyl phosphate and bis-(2-ethylhexyl) phosphate self-assembled films on iron surface using electrochemical methods, Fourier transform infrared spectroscopy, and molecular simulations.Journal of Physical Chemistry C,111(7),3109-3115.
MLA	W. J. Guo,et al."Investigations of triphenyl phosphate and bis-(2-ethylhexyl) phosphate self-assembled films on iron surface using electrochemical methods, Fourier transform infrared spectroscopy, and molecular simulations".Journal of Physical Chemistry C 111.7(2007):3109-3115.