分析化学2025，Vol.53Issue(5)：708-716,9.DOI:10.19756/j.issn.0253-3820.251072
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
Surface Enhanced Infrared Spectroelectrochemistry Revealing Cation Specific Absorption and Effects at Electrocatalytic Interface
摘要
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.关键词
阳离子效应/表面增强红外光谱电化学/双电层/振动斯塔克效应Key words
Cation effects/Surface enhanced infrared spectroelectrochemistry/Electric double layer/Vibrational Stark effect引用本文复制引用
李佳琦,武烈,姜秀娥..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[J].分析化学,2025,53(5):708-716,9.基金项目
国家重点研发计划项目(No.2022YFE0113000)和国家自然科学基金项目(No.22374083)资助. Supported by the National Key R&D Program of China(No.2022YFE0113000)and the National Natural Science Foundation of China(No.22374083). （No.2022YFE0113000）
