Tuning the electrodeposition parameters of silver to yield micro/nano structures from room temperature protic ionic liquids

Controlled electrodeposition of silver onto glassy carbon, gold and indium tin oxide-coated glass substrates has been achieved from three room temperature protic ionic liquids (PILs), ethylammonium nitrate, triethylammonium methylsulfonate, and bis(2-methoxyethyl)ammonium acetate. Cyclic voltammetri...

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Bibliographic Details
Published in:Electrochimica acta 2012-10, Vol.81, p.98-105
Main Authors: Suryanto, Bryan H.R., Gunawan, Christian A., Lu, Xunyu, Zhao, Chuan
Format: Article
Language:English
Subjects:
Chemistry
Density
Electrocatalysis
Electrocatalysts
Electrochemistry
Electrodeposition
Exact sciences and technology
General and physical chemistry
Ionic liquids
Nanostructure
Oxygen reduction reaction
Protic ionic liquids
Silver
Silver nanoparticles
Study of interfaces
Three dimensional
Tuning
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Summary:Controlled electrodeposition of silver onto glassy carbon, gold and indium tin oxide-coated glass substrates has been achieved from three room temperature protic ionic liquids (PILs), ethylammonium nitrate, triethylammonium methylsulfonate, and bis(2-methoxyethyl)ammonium acetate. Cyclic voltammetric, chronoamperometric, together with microscopic and X-ray techniques reveal that micro/nanostructured Ag thin films of controlled morphology, size, density, and uniformity can be achieved by tuning the electrodeposition parameters such as potential, time, types of PILs, substrate materials, and ionic liquid viscosity by altering the water content. Chronoamperometric results provide direct evidence that electrodeposition of Ag in protic ionic liquids takes place through a progressive nucleation and diffusion-controlled 3D growth mechanism. The as prepared Ag micro/nanoparticles have been employed as electrocatalysts for oxygen reduction reaction and exhibit excellent catalytic activity. The study provides promise for using protic ionic liquids as alternative electrolytes to conventional aprotic ionic liquids for electrodeposition of metals and nanostructured electrocatalysts.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2012.07.066