Surface Enhanced Infrared Spectroelectrochemistry Revealing Cation Specific Absorption and Effects at Electrocatalytic Interface
10.19756/j.issn.0253-3820.251072
- VernacularTitle:表面增强红外光谱电化学揭示电催化界面阳离子特异性吸附及效应
- Author:
Jia-Qi LI
1
;
Lie WU
;
Xiu-E JIANG
Author Information
1. 中国科学院长春应用化学研究所,电分析化学国家重点实验室,长春 130022;中国科学技术大学应用化学与工程学院,合肥 230026
- Keywords:
Cation effects;
Surface enhanced infrared spectroelectrochemistry;
Electric double layer;
Vibrational Stark effect
- From:
Chinese Journal of Analytical Chemistry
2025;53(5):708-716
- CountryChina
- Language:Chinese
-
Abstract:
Using surface-enhanced infrared absorption spectroscopy in conjunction with electrochemical techniques,this study investigates the origins of variations in electrocatalytic activity of 4-nitrothiophenol(4-NTP)under the influence of three cations:Li+,Na+,and tetramethylammonium(TMA+).The findings highlight the significant impact of specific interactions between cations and the electrode surface on electrocatalytic activity.By constructing vibrational Stark spectra,the study reveals the impact of cations on the structure of the electric double layer and the interfacial electric field.Further spectroscopic and electrochemical characterizations demonstrate that differences in the hydrophilic and hydrophobic properties of cations influence their specific interactions with the interface.Notably,TMA+,through specific interactions,acts as a mediator for charge transfer,effectively reducing the charge transfer resistance of the system and thereby enhancing electrocatalytic activity to some extent.These results elucidate the influence of specific cation/interface interactions and cation properties on electrocatalytic reactions,contributing to a deeper understanding of cation effects at electrochemical charged interfaces.
