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液相电化学-核磁共振联用技术及其应用 ; Coupling Liquid Phase Electrochemistry with Nuclear Magnetic Resonance Spectroscopy and Its Applications

Journal article published in 2011 by 倪祖荣, 崔晓红, 孙世刚, 陈忠
This paper was not found in any repository; the policy of its publisher is unknown or unclear.
This paper was not found in any repository; the policy of its publisher is unknown or unclear.

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Abstract

[中文文摘]原位电化学-核磁共振(EC-NMR)是一种具有良好应用前景的原位谱学方法,可以用于微观层次和分子水平研究电化学吸附、催化的过程和机理。作者综述了近年来发展起来的各种流动式和静态式液相EC-NMR联用技术,简要分析了电解池构造以及与EC-NMR装置联用时NMR谱线的特征。通过比较几种常用方法的优缺点,归纳了设计原位EC-NMR联用装置的主要要求。针对电解电极置于NMR谱仪样品检测区域对磁场均匀性的影响及电解电流引起谱线增宽造成分辨率降低这两个问题,提出从硬件上采用薄膜工作电极和电解电流平行静磁场的方法加以有效改善;方法上则可采用分子内多量子相干转移、章动回波、核Overhauser效应和分子间多量子相干转移技术来获得不均匀场下的高分辨NMR谱图,并比较分析了它们的优缺点和适用性。[英文文摘]The combination of liquid nuclear magnetic resonance spectroscopy(NMR) and electrochemistry(EC) is a new technique with promising prospect which provides novel,exciting,and crucial insights into the processes near or on the electrode surface at a molecular or atomic level.The development of in situ EC-NMR spectroscopy with flow or static electrolysis was summarized,the structures of the electrolysis cell and the characteristics of the NMR spectra were analyzed,and the feature of the in situ EC-NMR spectroscopy in practice was described in detail.The electrolysis electrode located at radio-frequency detection area of the NMR spectrometer reduced homogeneity of the magnetic field.Furthermore,the electrolysis current results in broadened spectral lines and loss of resolution.The working electrode consisting of a thin metal film and the electrolysis current parallel to the static magnetic field can overcome such short comings.Besides,several high-resolution methods in inhomogeneous fields were discussed and compared,such as intramolecular multiple quantum coherences,nutation echos,intermolecular nuclear Overhauser effects,and intermolecular multiple quantum coherences. ; 作者简介:倪祖荣,1973年生,厦门大学物理系博士研究生 E-mail:zrni@xmu.edu.cn通讯联系人E-mail:chenz@xmu.edu.cn ; 国家自然科学基金国际合作项目(20921120405);福建省自然科学基金项目(2009J01298)资助