苯并三唑
铜
循环伏安法
材料科学
水溶液
吸附
无机化学
铜水管的冲蚀腐蚀
电化学
十二烷基硫酸钠
开路电压
氯化物
化学
物理化学
冶金
电极
有机化学
电压
物理
量子力学
作者
Sheng-Xiang Yang,Xiao Zhao,Zhiyuan Qi,Yuhui Lu,Gábor A. Somorjai,Peidong Yang,Artem Baskin,David Prendergast,Miquel Salmerón
标识
DOI:10.1021/acsami.1c15808
摘要
The structure and composition of copper surfaces in aqueous solutions of benzotriazole (BTAH) and NaCl was investigated by sum frequency vibrational spectroscopy as a function of concentration and bias during cyclic voltammetry experiments. We found that the protection provided by the BTAH films formed at the copper surface is effective for negative bias voltages below the open circuit potential (OCP) but not at positive voltages where Cl– displaces BTAH. By measuring the Gibbs adsorption energy of BTAH and Cl–, we found that a particularly stable Cl– structure is formed around the OCP, suggesting that electronegative additives that move the OCP to higher negative values can improve BTAH protection, which we confirmed by the addition of a negatively charged sodium dodecyl sulfate surfactant.
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