Anodic behavior of neodymium in acidic AlCl3-1-ethyl-3-methyl-imidazolium chloride ionic liquid
来源期刊：JOURNAL OF RARE EARTHS2015年第7期
论文作者：曲瑞 江奕东 徐霸津 丁晶晶 廖成 凌国平
文章页码：776 - 782
摘 要：The anodic behavior of neodymium in acidic Al Cl3-1-ethyl-3-methyl-imidazolium chloride（Al Cl3-EMIC） ionic liquid was investigated by conducting linear sweep voltammeter and chonopotentiometry. The viscosity of Nd dissolved ionic liquid and the surface morphologies of Nd were characterized using an Ostwald viscometer and a scanning electron microscope, respectively. The chemical composition of Nd surface was indentified by Raman spectra. The results showed that dissolution of Nd under anodic polarization occurred after the breakdown of oxide films. A viscous layer formed at the interface of Nd/ionic liquid during the galvanostatic process of 5 and 20 m A/cm2. The formation of viscous layer was attributed to the accumulation of Nd dissolved Al Cl3-EMIC ionic liquid, which had high viscosity. The oxide films could be removed thoroughly and the surface of Nd was homogeneous without etching pits, when viscous layer formed in the anodic process. Otherwise, the surface showed a pitting morphology.
曲瑞1，江奕东2，徐霸津1，丁晶晶2，廖成2，凌国平1
1. College of Materials Science and Engineering, Zhejiang University2. Chengdu Green Energy and Green Manufacturing Technology R&D Centre
摘 要：The anodic behavior of neodymium in acidic Al Cl3-1-ethyl-3-methyl-imidazolium chloride（Al Cl3-EMIC） ionic liquid was investigated by conducting linear sweep voltammeter and chonopotentiometry. The viscosity of Nd dissolved ionic liquid and the surface morphologies of Nd were characterized using an Ostwald viscometer and a scanning electron microscope, respectively. The chemical composition of Nd surface was indentified by Raman spectra. The results showed that dissolution of Nd under anodic polarization occurred after the breakdown of oxide films. A viscous layer formed at the interface of Nd/ionic liquid during the galvanostatic process of 5 and 20 m A/cm2. The formation of viscous layer was attributed to the accumulation of Nd dissolved Al Cl3-EMIC ionic liquid, which had high viscosity. The oxide films could be removed thoroughly and the surface of Nd was homogeneous without etching pits, when viscous layer formed in the anodic process. Otherwise, the surface showed a pitting morphology.
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