电化学2017，Vol.23Issue(3)：332-339,8.DOI:10.13208/j.electrochem.161053
1-丁基-3-甲基咪唑醋酸盐和水混合电解液中三价铬电沉积铬的研究
Electrochemical Deposition of Cr from Cr3+ in the Mixed Electrolyte of [BMIM]OAc/H2O
罗维 1钮东方 1杜荣斌 2王钧伟 2汪竹青 2徐衡 2张新胜1
作者信息
- 1. 华东理工大学化学工程联合国家重点实验室,上海200237
- 2. 石油化工新材料协同创新中心,安徽安庆246011
- 折叠
摘要
Abstract
The electrochemical reduction of trivalent chromium ion (Cr3+) to Cr in 1-butyl-3-methylimidazolium acetate ([BMIM]OAc)-H2O mixed electrolyte was investigated.The cyclic voltammograms showed that the electroreduction of Cr3+ in the mixed electrolyte occurred in a two-step process,namely,Cr3+ + e → Cr2+ and Cr2+ + 2e → Cr0,controlled by the diffusion of Cr3+ to the electrode.The diffusion coefficient of Cr3+ was 1.2 x 10-8 cm2·s-1 at 40 ℃ obtained by Rendle-Sevcik equation.The chronoamperomograms of the Cr3+ electrodeposition confirmed the three-dimensional instantaneous nucleation mechanism of Cr.The XRD and SEM characterizations on the Cr coating after calcining in argon atmosphere at 600 ℃ revealed that the coating was composed of Cr and chromium oxide (Cr2O3) nanoparticles with an average particle size of 0.48 μm.The elements of Cr and O were obviously detected from the coating obtained at 40 ℃ and-3.0 V by EDX and the mass fraction of Cr reached 83.8％.Comparison in the qualities of coating layers prepared by Cr electrodepositions in [BMIM]OAc,[BMIM]BF4 and [BMIM]PF6 electrolytes indicated that the OAc-was presented in favor of Cr3+ reduction.关键词
电沉积/1-丁基-3-甲基咪唑乙酸盐/三价铬/铬镀层Key words
electrodeposition/1-butyl-3-methylimidazolium acetate/trivalent chromium ion/Cr coating分类
化学化工引用本文复制引用
罗维,钮东方,杜荣斌,王钧伟,汪竹青,徐衡,张新胜..1-丁基-3-甲基咪唑醋酸盐和水混合电解液中三价铬电沉积铬的研究[J].电化学,2017,23(3):332-339,8.
