高等学校化学学报Issue(1)：140-145,6.DOI:10.7503/cjcu20130278
离子液体[BMIM]PF6中铬的电沉积行为
Electrodeposition Behavior of Chromium in Ionic Liquid [ BMIM] PF6
摘要
Abstract
1-Butyl-3-methylimidazolium hexafluorophosphate ( [ BMIM ] PF6 ) ionic liquid was synthesized by 1-chlorobutane, N-methylimidazole and KPF6 . The structure of ionic liquid was investigated by IR spectrum. The electrochemical window of [ BMIM] PF6 was determined to be 4.7 V at 85 ℃ by cyclic voltammetry. The electrochemical behavior of the[ BMIM] PF6-Cr(Ⅲ) electrolyte was studied. The reduction of chromium from Cr(Ⅲ) to Cr(0) in the solution is a one-step irreversible growth process which is controlled by diffusion. The cathodal transfer coefficient(α) is 0.023 and the cathode diffusion coefficient( D0 ) is 1.142í10-6 cm2/s. The electrodeposition of chromium on copper substrate from [ BMIM] PF6-Cr(Ⅲ) were experimented by potentio-static method at-1.5 V. The surface morphology of chromium coating was characterized by means of scanning electron microscopy( SEM) and its morphology was granular structure. The size of granulae increase with the increase of deposition time. The chemical composition and structure of chromium coating were tested by energy dispersive spectrometry(EDS) and X-ray diffraction(XRD). The results indicate that the coating consist of amorphous metallic chromium.关键词
铬/离子液体/循环伏安/电化学窗口/电沉积Key words
Chromium/Ionic liquid/Cyclic voltammetry/Electrochemical window/Electrodeposition分类
化学化工引用本文复制引用
玉山江·哈斯木,刘瑞泉,米红宇..离子液体[BMIM]PF6中铬的电沉积行为[J].高等学校化学学报,2014,(1):140-145,6.基金项目
新疆维吾尔自治区高校科研计划项目(批准号:XJEDU2012I05)和国家自然科学基金(批准号:21063013)资助.@@@@Supported by the University Scientific Research Project of Xinjiang Uygur Autonomous Region, China(No. XJEDU2012I05) and National Natural Foundation of China(No.21063013) （批准号:XJEDU2012I05）
