Electrosorption of p-nitrobenzoic acid at a gold electrode in perchloric acid solutions studied by using cyclic voltammetry, EQCM, in situ FTIRS and Raman spectroscopy

被引:16
作者
Xiao, XY [1 ]
Sun, SG [1 ]
机构
[1] Xiamen Univ, Inst Phys Chem, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China
关键词
PNBA; adsorption; Au electrode; EQCM; in situ FTIRS; SERS;
D O I
10.1016/S0013-4686(00)00365-0
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Adsorption of p-nitrobenzoic acid (PNBA) at an Au electrode in 0.1 M HClO4 solutions has been studied by combining cyclic voltammetry, electrochemical quartz crystal microbalance (EQCM), in situ Fourier transform infrared spectroscopy (FTIRS) and surface enhanced Raman spectroscopy (SERS). The adsorption of PNBA on Au electrode yields two current peaks appearing in the potential region between 0.3 and 1.0 V. A surface mass change of 74 ng cm(-2) has been determined by EQCM, corresponds to the adsorption, which associates to a variation of surface concentration of 2.8 x 10(14) molecules cm(-2). The spectral features observed from studies of in situ FTIRS and SERS illustrated, at molecular level, the potential-dependence properties of PNBA adsorption. The results demonstrated that the molecule of PNBA adsorbs in a Rat mode at potentials below 0.3 V and that at higher potentials it trends to adsorb in a vertical adsorption mode via its carboxylic group towards Au electrode surface. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:2897 / 2902
页数:6
相关论文
共 18 条
[1]  
ALBERY WJ, 1975, J ELECTROANAL CHEM, V65, P901, DOI 10.1016/0368-1874(75)85165-3
[2]  
[Anonymous], ELECTROCHEMICAL PHAS
[3]   Potential-dependent reorientation of water molecules at an electrode/electrolyte interface studied by surface-enhanced infrared absorption spectroscopy [J].
Ataka, K ;
Yotsuyanagi, T ;
Osawa, M .
JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (25) :10664-10672
[4]   FREE-RADICAL STUDIES BY RESONANCE RAMAN-SPECTROSCOPY .3. 4-NITROBENZOATE RADICAL DIANION [J].
ERNSTBRUNNER, EE ;
GIRLING, RB ;
HESTER, RE .
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS II, 1978, 74 :1540-1549
[5]   SURFACE-ENHANCED RAMAN-SPECTROSCOPY AS A PROBE OF ELECTROORGANIC REACTION PATHWAYS .1. PROCESSES INVOLVING ADSORBED NITROBENZENE, AZOBENZENE, AND RELATED SPECIES [J].
GAO, P ;
GOSZTOLA, D ;
WEAVER, MJ .
JOURNAL OF PHYSICAL CHEMISTRY, 1988, 92 (25) :7122-7130
[6]   ENHANCEMENT OF THE INFRARED-ABSORPTION FROM MOLECULAR MONOLAYERS WITH THIN METAL OVERLAYERS [J].
HARTSTEIN, A ;
KIRTLEY, JR ;
TSANG, JC .
PHYSICAL REVIEW LETTERS, 1980, 45 (03) :201-204
[7]   OBSERVATION OF THE ENHANCED INFRARED-ABSORPTION OF PARA-NITROBENZOATE ON AG ISLAND FILMS WITH AN ATR TECHNIQUE [J].
HATTA, A ;
OHSHIMA, T ;
SUETAKA, W .
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1982, 29 (02) :71-75
[8]   In situ FTIRS investigations of surface processes of Rh electrode - Novel observation of geminal adsorbates of carbon monoxide on Rh electrode in acid solution [J].
Lin, WF ;
Sun, SG .
ELECTROCHIMICA ACTA, 1996, 41 (06) :803-809
[9]   NITROSOBENZENE ANION RADICAL AS AN INTERMEDIATE SPECIES OF REDUCTION OF NITROBENZENE AT A GOLD ELECTRODE IN AQUEOUS ALKALINE-SOLUTION [J].
NISHIHARA, C ;
KAISE, M .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1983, 149 (1-2) :287-290
[10]   SURFACE-ENHANCED INFRARED EXTERNAL REFLECTION SPECTROSCOPY AT LOW REFLECTIVE SURFACES AND ITS APPLICATION TO SURFACE-ANALYSIS OF SEMICONDUCTORS, GLASSES, AND POLYMERS [J].
NISHIKAWA, Y ;
FUJIWARA, K ;
ATAKA, K ;
OSAWA, M .
ANALYTICAL CHEMISTRY, 1993, 65 (05) :556-562