Passivation of Copper: Benzotriazole Films on Cu(111)
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- 作者：Federico Grillo ; Daniel W. Tee ; Stephen M. Francis ; Herbert A. Fr眉chtl ; Neville V. Richardson
- 刊名：Journal of Physical Chemistry C
- 出版年：2014
- 出版时间：April 24, 2014
- 年：2014
- 卷：118
- 期：16
- 页码：8667-8675
- 全文大小：506K
- 年卷期：v.118,no.16(April 24, 2014)
- ISSN：1932-7455
文摘
Benzotriazole (BTAH) has been used as a copper corrosion inhibitor since the 1950s. However, the molecular level detail of how adsorption and surface passivation occur remains a matter of debate. BTAH adsorption on a Cu(111) single crystal has been investigated from medium coverage to multilayer using scanning tunneling microscopy (STM), temperature-programmed desorption (TPD), high resolution electron energy loss (HREEL) spectroscopy and supporting density functional theory (DFT) calculations. Both physisorbed and chemisorbed phases are observed. One extended and highly ordered self-assembled metal鈭抩rganic phase is seen at saturation coverage and above. A metastable phase is also observed. Complete desorption occurs at ca. 600 K. Those structures are critically discussed in the light of some of the various adsorption models reported in the literature and an alternative adsorption model is proposed. These results allow a further understanding of the interaction between benzotriazole and copper and, in turn, may help understanding the mechanism for protection of copper and copper alloys from corrosion, substantially contributing to a long-standing debate.