高等学校化学学报2024，Vol.45Issue(1)：28-34,7.DOI:10.7503/cjcu20230349
离子液体中PMBA脱羧反应及界面水影响的电化学SERS研究
Electrochemical-SERS Investigation on the Decarboxylated Reaction of PMBA in Ionic Liquid and Influence of Interfacial Water
摘要
Abstract
Based on the gas-liquid interface self-assembly method and transfer technology,a glassy carbon electrode loaded with Au nanoparticles monolayer(Au MLF@GC)was prepared,and it was employed to in situ study the interfacial processes of ionic liquid electrochemical systems.The decarboxylation of p-mercaptobenzoic acid(PMBA)catalyzed by surface plasmon resonance(SPR)to phenylthiophenol(TP)as the probe reaction,the electrochemical surface-enhanced Raman spectroscopy(SERS)was developed to investigated the kinetic behaviours of the reaction of PMBA in[BMIm]BF4 systems via the potential-step method.The potential of zero charge(pzc)of the hydrophilic ionic liquid[BMIm]BF4/Au MLF@GC was determined to be-0.95 V by the differential capacitance and i-t measure-ments for electrode immersion.The decarboxylation of PMBA occurred in the positive region of the pzc,and the reaction rate constant was determined based on the second order kinetic reaction and change of the SERS intensities of relevant peaks.The linear relationship between the logarithm of the reaction rate constant and the step potential was resolved.With the addition of extra-water(XW)from 0 to 0.001 and 0.003(molar ratio),the initial step potential was shifted negatively,and the reaction rate constant increased with the addition of water at the same step potential.关键词
离子液体/表面增强拉曼光谱/电化学/脱羧反应速率常数/零电荷电位Key words
Ionic liquid/Surface-enhanced Raman spectroscopy/Electrochemistry/Decarboxylated reaction rate constant/Potential of zero charge分类
化学化工引用本文复制引用
秦海敬,贺乾军,徐敏敏,袁亚仙,姚建林..离子液体中PMBA脱羧反应及界面水影响的电化学SERS研究[J].高等学校化学学报,2024,45(1):28-34,7.基金项目
国家自然科学基金(批准号:22172109,21773166)和江苏省高等学校自然科学研究重大项目(批准号:21KJA150009)资助.Supported by the National Natural Science Foundation of China(Nos.22172109,21773166)and the Key Program of Natural Science Research Project of Jiangsu Colleges and Universities,China(No.21KJA150009). （批准号:22172109,21773166）
