期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 853, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2019.113559
关键词
SHINERS; Tin (IV) oxide shells; Alkaline conditions; Steel; Corrosion; Benzotriazole
资金
- International Mineral Innovation Institute (IMII)
- Collaborative Research and Development Grants Program of the Natural Sciences and Engineering Research Council of Canada (NSERC)
- potash mining company Nutrient
- potash mining company Mosaic
- potash mining company BHP
Electrochemical shell isolated nanoparticle enhanced Raman spectroscopy (SHINERS) in alkaline environments using Au@SnO2 core-shell particles is reported. Au nanoparticles covered by an approximately 4 nm thick SnO2 shell are shown to be pinhole free and provide strong surface enhanced Raman scattering of a pyridine derivative adsorbed on smooth gold surfaces. The Au@SnO2 core-shell particles are used to demonstrate the first electrochemical SHINERS spectra of corrosion products on 304 stainless steel and carbon steel. Unlike Au@SiO2 particles, the SnO2 shells are not degraded by the local high pH created by electrolysis reactions. The SHINERS spectra for 304 stainless steel are indicative of amorphous or microcrystalline Fe(OH)(2) with a small contribution from Cr(VI) oxide at high overpotentials. In the presence of KCl, a band attributed to gamma-FeOOH is found in the spectra. For carbon steel the SHINERS spectra did not show any evidence of Fe oxides, hydroxides or oxyhydroxides but rather the formation of the Fe-water complex, [Fe(H2O)(6)](n+) (n = 2,3) at the electrode surface. SHINERS data for carbon steel in the presence of an organic inhibitor, benzotriazole (BTA), indicate that BTA inhibits the formation of Fe-water complexes at the surface of the electrode that form in its absence.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据