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Title: Fabrication of Uniform Nanoparticulate Gold through Potential-Modulated Electrochemical Deposition and Dissolution of Silver in Ionic Liquids

Abstract

Nanoparticulate gold (NPG) has been successfully produced from polycrystalline Au by a novel method based on potential-modulated electrochemical deposition and dissolution of silver in an ionic liquid bath comprising of 1-ethyl-3-methylimidazolium chloride and silver nitrate at elevated temperatures. Cyclic voltammetric measurements exhibit that the potential cycles between -1.0 and 0.75 V versus a silver pseudo reference electrode can drive the electrochemical deposition and dissolution of silver onto and away from the Au electrode. Scanning electron microscope studies show that the NPG resulting from the potential cycles has very narrow particle size distribution with an average diameter of approximately 50 nm and is free of elemental Ag residue. As compared to a bulk Au electrode, the NPG electrode demonstrates substantially enhanced electrochemical responses. It exhibits a seven-time higher electro-catalytic activity towards the electrooxidation of nitrite in acidic media.

Authors:
ORCiD logo [1]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States). Nuclear Science & Technology Directorate; Univ. of Illinois at Urbana-Champaign, Champaign, IL (United States). Illinois Sustainable Technology Center
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
INL LDRD office; USDOE
OSTI Identifier:
1574012
Report Number(s):
INL/JOU-19-54496-Rev000
Journal ID: ISSN 0013-4651
Grant/Contract Number:  
AC07-05ID14517
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 166; Journal Issue: 15; Journal ID: ISSN 0013-4651
Publisher:
The Electrochemical Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; Electrochemical deposition and dissolution; Nanoparticulate gold; Ionic liquid; Gold-silver alloy; Electrochemical sensing

Citation Formats

Jiang, Junhua. Fabrication of Uniform Nanoparticulate Gold through Potential-Modulated Electrochemical Deposition and Dissolution of Silver in Ionic Liquids. United States: N. p., 2019. Web. doi:10.1149/2.0791915jes.
Jiang, Junhua. Fabrication of Uniform Nanoparticulate Gold through Potential-Modulated Electrochemical Deposition and Dissolution of Silver in Ionic Liquids. United States. doi:10.1149/2.0791915jes.
Jiang, Junhua. Wed . "Fabrication of Uniform Nanoparticulate Gold through Potential-Modulated Electrochemical Deposition and Dissolution of Silver in Ionic Liquids". United States. doi:10.1149/2.0791915jes. https://www.osti.gov/servlets/purl/1574012.
@article{osti_1574012,
title = {Fabrication of Uniform Nanoparticulate Gold through Potential-Modulated Electrochemical Deposition and Dissolution of Silver in Ionic Liquids},
author = {Jiang, Junhua},
abstractNote = {Nanoparticulate gold (NPG) has been successfully produced from polycrystalline Au by a novel method based on potential-modulated electrochemical deposition and dissolution of silver in an ionic liquid bath comprising of 1-ethyl-3-methylimidazolium chloride and silver nitrate at elevated temperatures. Cyclic voltammetric measurements exhibit that the potential cycles between -1.0 and 0.75 V versus a silver pseudo reference electrode can drive the electrochemical deposition and dissolution of silver onto and away from the Au electrode. Scanning electron microscope studies show that the NPG resulting from the potential cycles has very narrow particle size distribution with an average diameter of approximately 50 nm and is free of elemental Ag residue. As compared to a bulk Au electrode, the NPG electrode demonstrates substantially enhanced electrochemical responses. It exhibits a seven-time higher electro-catalytic activity towards the electrooxidation of nitrite in acidic media.},
doi = {10.1149/2.0791915jes},
journal = {Journal of the Electrochemical Society},
number = 15,
volume = 166,
place = {United States},
year = {2019},
month = {11}
}

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