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暂态电化学分析技术由于可以提供与时间相关的电极过程动力学信息,在电化学研究中应用广泛。本文着重介绍了在正弦电流/电压激励下电化学系统的时频响应特性,其非线性频响行为的谱学表达、数值模拟方法以及实验表征方法,综述了非线性谱学分析技术在电化学研究中的应用。文中指出基于反应机理的谱学模拟与实验表征结果的对比是当前开展电化学非线性谱学研究的主要模式,总结出其在实验测量中交流振幅的选取原则,并在最后提出电化学系统的非线性主要源于反应动力学,非线性谱学分析因此在电化学反应的机理研究以及电化学系统诊断的许多方面独具优势。
Transient electrochemical analysis technology is widely used in electrochemical research due to its ability to provide time-dependent information on electrode process dynamics. This paper focuses on the time-frequency response characteristics of the electrochemical system under sinusoidal current / voltage excitation, the spectral representation of the nonlinear frequency response, the numerical simulation method and the experimental characterization method. In this paper, the applications of nonlinear spectroscopy in electrochemical Research application It is pointed out that the comparison of the results of spectral simulation and experimental characterization based on the reaction mechanism is the main mode of carrying out electrochemical nonlinear spectroscopy. The principle of selecting the amplitude of the AC in experimental measurement is summarized. Finally, the electrochemical system The nonlinearity is mainly due to the reaction kinetics. Nonlinear spectroscopy analysis therefore has unique advantages in many aspects of electrochemical reaction mechanism studies and electrochemical system diagnostics.