X-ray absorption spectroscopy of electrochemically oxidized Cu exposed to Na2S

被引：35

作者：

Hollmark, H. M. ^{[1
]}

Keech, P. G. ^{[2
]}

Vegelius, J. R. ^{[1
]}

Werme, L. ^{[1
]}

Duda, L. -C. ^{[1
]}

机构：

[1] Uppsala Univ, Dept Phys & Astron, Div Mol & Condensed Matter Phys, SE-75120 Uppsala, Sweden

[2] Univ Western Ontario, Dept Chem, London, ON N6A 5B7, Canada

来源：

CORROSION SCIENCE | 2012年 / 54卷

关键词：

Copper; AFS (EXAFS & XANES); Sulphidation; COPPER THIN-FILMS; ALKALINE-SOLUTIONS; OXIDE-FILMS; OXIDATION; CORROSION; BEHAVIOR; SURFACE; GROWTH;

D O I：

10.1016/j.corsci.2011.09.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Copper surfaces have been investigated by X-ray absorption spectroscopy after electrochemical oxidation and subsequent exposure to sulfide solution. Oxide surface layers on bulk copper surfaces were electrochemically grown in an aqueous NaOH solution at two different potentials and the resulting chemical composition was investigated using X-ray absorption spectroscopy. At both potentials the resulting surfaces consisted largely of Cu2O. At the more strongly oxidizing potential, an admixture of Cu2+-containing phases - mostly Cu(OH)(2) - was detected. Sulfide exposure of both surfaces was found to completely reduce the surface from Cu2+ to Cu1+ and resulted in the formation of Cu2S with an admixture of Cu2O. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：85 / 89

页数：5

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