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Electric double layer contribution to sum frequency generation signal from Au electrode.
Song, Qian-Tong; Huang-Fu, Zhi-Chao; Liu, XiaoLin; Wang, Yue; He, YuHan; Yu, ZhiYuan; Wang, ChangYi; Sun, Shi-Gang; Wang, ZhaoHui.
Afiliación
  • Song QT; College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
  • Huang-Fu ZC; College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
  • Liu X; College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
  • Wang Y; College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
  • He Y; College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
  • Yu Z; College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
  • Wang C; College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
  • Sun SG; College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
  • Wang Z; College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
J Chem Phys ; 158(21)2023 Jun 07.
Article en En | MEDLINE | ID: mdl-37278478
Understanding the electric double layer (EDL) of the metal electrode-electrolyte interface is essential to electrochemistry and relevant disciplines. In this study, potential-dependent electrode Sum Frequency Generation (SFG) intensities of polycrystalline gold electrodes in HClO4 and H2SO4 electrolytes were thoroughly analyzed. The potential of zero charges (PZC) of the electrodes was -0.06 and 0.38 V in HClO4 and H2SO4, respectively, determined from differential capacity curves. Without specific adsorption, the total SFG intensity was dominated by the contribution from the Au surface and increased similar to that of the visible (VIS) wavelength scanning, which pushed the SFG process closer to the double resonant condition in HClO4. However, the EDL contributed about 30% SFG signal with specific adsorption in H2SO4. Below PZC, the total SFG intensity was dominated by the Au surface contribution and increased with potential at a similar slope in these two electrolytes. Around PZC, as the EDL structure became less ordered and the electric field changed direction, there would be no EDL SFG contribution. Above PZC, the total SFG intensity increased much more rapidly with potential in H2SO4 than in HClO4, which suggested that the EDL SFG contribution kept increasing with more specific adsorbed surface ions from H2SO4.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Chem Phys Año: 2023 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Chem Phys Año: 2023 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos