The facile formation of silver dendritic structures in the absence of surfactants and their electrochemical and SERS properties

Sharma, Digish K., Ott, Andreas, O'Mullane, Anthony P., & Bhargava, Suresh K. (2011) The facile formation of silver dendritic structures in the absence of surfactants and their electrochemical and SERS properties. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 386(1-3), pp. 98-106.

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Abstract

In this work a simple approach to the creation of highly dispersed electrocatalytically active silver microstructured dendrites on indium tin oxide in the absence of any surface modification or surfactant is presented. It is found that the addition of low concentrations of supporting electrolyte to the AgNO3 solution dramatically influences the morphology of electrodeposited silver which is independent of both the anion and the cation employed. The silver dendrites are characterized by SEM, XRD, XPS as well as by cyclic voltammetry under alkaline conditions. It is found that the surface oxide formation and removal processes are significantly influenced by the microstructured morphology of the silver electrodeposits compared to a smooth macrosized silver electrode. The facile formation of dendritic silver microstructures is also shown to be beneficial for the electrocatalytic oxidation of both formaldehyde and hydrazine and oxygen reduction. The formation of a continuous film of dendritic silver is also investigated for its SERS activity where the connectivity between the individual dendrites is found to be particularly important.

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25 citations in Web of Science®

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ID Code: 64297
Item Type: Journal Article
Refereed: Yes
Keywords: Electrodeposition, Dendrites, Electrocatalysis, Silver, SERS
DOI: 10.1016/j.colsurfa.2011.07.001
ISSN: 0927-7757
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 19 Nov 2013 23:35
Last Modified: 21 Nov 2013 04:55

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