摘要
应用表面增强拉曼光谱(SERS)和电化学方法,对铜电极表面吡咯烷二硫代氨基甲酸铵(APDTC)的自组装单层结构、缓蚀性能和吸附行为进行研究。SERS光谱表明:APDTC分子通过硫原子垂直吸附在铜表面形成APDTC自组装单分子膜(APDTC SAMs)。交流阻抗和极化曲线实验表明:在3%NaCl(质量分数)溶液中APDTC SAMs对铜具有很好的缓蚀作用,最高缓蚀效率可达98%;APDTC的吸附行为符合Langmuir吸附等温式,吸附机理是介于化学吸附和物理吸附之间的一种吸附。
The structure,corrosion inhibition and adsorption behavior of ammonium pyrrolidine dithiocarbamate（APDTC） self-assembled monolayers（SAMs） on a copper surface were investigated by surface-enhanced Raman scattering spectroscopy（SERS） and electrochemical methods.The results of SERS experiment show that APDTC SAMs is adsorbed on the copper surface by its S atoms with perpendicular orientation.The AC impedance and DC polarization results indicate that APDTC SAMs have good corrosion inhibition effects on copper in a 3% NaCl solution and its maximum inhibition efficiency can reach 98%.Adsorption of the APDTC SAMs is found to follow the Langmuir′s adsorption isotherm and the mechanism consists of a mixed adsorption between chemisorption and physisorption.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2010年第11期2213-2220,共8页
The Chinese Journal of Nonferrous Metals
基金
上海市重点学科建设资助项目(P1304)
上海高校电力腐蚀控制与应用电化学重点实验室开放基金资助项目(09KLSU01)
上海热交换系统节能工程技术研究中心开放基金资助项目(09SERC03)
上海市科委资助项目(08DZ2210800)
关键词
铜
吡咯烷二硫代氨基甲酸铵
拉曼光谱
自组装单分子膜
缓蚀
吸附
copper
ammonium pyrrolidine dithiocarbamate
Raman spectrum
self-assembled monolayer
corrosion inhibition
adsorption
