• Chinese Journal of Chemical Physics
  • Vol. 33, Issue 5, 05000554 (2020)
Liu Cai-he1、2, Bai Rui-peng1、2, Bai Yu1, Guo Yuan1、2, and Zhang Zhen1、2、*
Author Affiliations
  • 1Beijing National Laboratory of Molecular Sciences, State Key Laboratory of Molecular Reaction Dynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  • 2University of the Chinese Academy of Sciences, Beijing 100049, China
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    Abstract

    Si(111) electrode has been widely used in electrochemical and photoelectrochemical studies. The potential dependent measurements of the second harmonic generation (SHG) were performed to study Si(111) electrode interface. At different azimuthal angles of the Si(111) and under different polarization combinations, the curve of the intensity of SHG with extern potential has a different form of line or parabola. Quantitative analysis showed that these differences in the potential-dependence can be explained by the isotropic and anisotropic contribution of the Si(111) electrode. The change in the isotropic and anisotropic contribution of the Si(111) electrode may be attributed to the increase in the doping concentration of Si(111) electrodes.

    Ⅰ INTRODUCTION

    The solid-liquid interface not only has been a central issue in electrochemistry but also has an important application in heterogeneous catalysis, tribology, chemical sensors, and biofilm systems. The redox reactions in electrochemistry all occur on the electrode surface and the properties of the electrode surface play a decisive role in the electrochemical reaction.

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    Cai-he Liu, Rui-peng Bai, Yu Bai, Yuan Guo, Zhen Zhang. Si(111) Electrode/Electrolyte Interfacial Studied by in-situ Second Harmonic Generation[J]. Chinese Journal of Chemical Physics, 2020, 33(5): 554
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    Received: Jul. 22, 2020
    Accepted: Sep. 15, 2020
    Published Online: Apr. 21, 2021
    The Author Email: Zhang Zhen (zhangz@iccas.ac.cn)