An investigation of silver electrodeposition from ionic liquids: Influence of atmospheric water uptake on the silver electrodeposition mechanism and film morphology

被引：66

作者：

Basile, Andrew ^{[1
,2
]}

Bhatt, Anand I. ^{[1
]}

O'Mullane, Anthony P. ^{[2
]}

Bhargava, Suresh K. ^{[2
]}

机构：

[1] CSIRO Energy Technol, Clayton, Vic 3169, Australia

[2] RMIT Univ, Sch Appl Sci, Melbourne, Vic 3001, Australia

来源：

ELECTROCHIMICA ACTA | 2011年 / 56卷 / 07期

关键词：

Ionic liquid; Silver electrodeposition; Nucleation-growth; TEMPERATURE MOLTEN-SALT; NANOPARTICLES; NUCLEATION; CARBON; DEPOSITION; CHLORIDE; GROWTH; STM;

D O I：

10.1016/j.electacta.2010.12.083

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrodeposition of silver from two ionic liquids, 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF4]) and N-butyl-N-methyl-pyrrolidinium bis(trifluoromethanesulfonyl)imide ([C(4)mPyr][TFSI]), and an aqueous KNO3 solution on a glassy carbon electrode was undertaken. It was found by cyclic voltammetry that the electrodeposition of silver proceeds through nucleation-growth kinetics. Analysis of chronoamperometric data indicated that the nucleation-growth mechanism is instantaneous at all potentials in the case of [BMIM][BF4] and [C(4)mPyr][TFSI], and instantaneous at low overpotentials tending to progressive at high overpotentials for KNO3. Significantly, under ambient conditions, the silver electrodeposition mechanism changes to progressive nucleation and growth in [C(4)mPyr][TFSI], which is attributed to the uptake of atmospheric water in the IL It was found that these differences in the growth mechanism impact significantly on the morphology of the resultant electrodeposit which is characterised ex situ by scanning electron microscopy and X-ray diffraction. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：2895 / 2905

页数：11

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