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Understanding the adsorption and anticorrosive mechanism of DNA inhibitor for copper in sulfuric acid

机译:了解DNA抑制剂对硫酸铜的吸附和防腐机理

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摘要

Deoxyribonucleic acid (DNA) was investigated for suppressing copper corrosion in 0.5 M H2SO4 through electrochemical measurement, microscopic surface observation, X-ray photoelectron spectroscopy (XPS) analysis and molecular dynamics (MD) simulation. Results indicate that DNA acts as an effective cathodic-type inhibitor that mainly suppresses cathodic reaction by forming anchored DNA-adsorption film. The film shows active blocking effect, obeys the Langmuir adsorption model and involves physisorption and chemisorption. The MD simulation gives the new insights at molecular level and indicates the formation of an interesting double barrier of DNA molecule on the Cu (111) surface due to its unique twist structure.
机译:通过电化学测量,微观表面观察,X射线光电子能谱(XPS)分析和分子动力学(MD)模拟,研究了脱氧核糖核酸(DNA)抑制0.5 M H2SO4中的铜腐蚀。结果表明,DNA是有效的阴极型抑制剂,主要通过形成锚定的DNA吸附膜来抑制阴极反应。该膜显示出主动的阻滞作用,服从Langmuir吸附模型,涉及物理吸附和化学吸附。 MD模拟在分子水平上提供了新的见解,并指出由于其独特的扭曲结构,在Cu(111)表面上形成了有趣的DNA分子双重屏障。

著录项

  • 来源
    《Applied Surface Science》 |2019年第30期|228-238|共11页
  • 作者单位

    Chinese Acad Sci Ningbo Inst Mat Technol & Engn Key Lab Marine Mat & Related Technol Zhejiang Key Lab Marine Mat & Protect Technol Ningbo 315201 Zhejiang Peoples R China|Chongqing Univ Sch Chem & Chem Engn Chongqing 400044 Peoples R China;

    Chongqing Univ Sch Chem & Chem Engn Chongqing 400044 Peoples R China;

    Chinese Acad Sci Ningbo Inst Mat Technol & Engn Key Lab Marine Mat & Related Technol Zhejiang Key Lab Marine Mat & Protect Technol Ningbo 315201 Zhejiang Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Corrosion inhibitor; DNA; Anchored film; XPS; Molecular dynamics simulation;

    机译:缓蚀剂;脱氧核糖核酸;锚定的影片;XPS;分子动力学模拟;

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