Effect of poly(N-vinyl-pyrrolidone) on electrochemical production of Cu nanoparticles

Mikiko Saito, Tomohiro Ishii, Hidemichi Fujiwara, Takayuki Homma

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Cu nanoparticles were synthesized via electrochemical deposition and the effect of the addition of poly(N-vinyl-pyrrolidone) (PVP) and pH on the properties of the nanoparticles was investigated. The Cu nanoparticles were prepared from an electrolyte containing copper acetate (pH 5.50) or copper sulfate (pH 4.14) by collecting the dispersed particles in the solution after electrochemical reduction. With the use of the acetate bath, formation of Cu2O at -0.2 and -1.5 V vs. Ag/AgCl was confirmed. On the other hand, Cu2O formation was not observed with the sulfate bath due to the lower pH, and the Cu nanoparticles could not be obtained at the potential of -1.5 V vs. Ag/AgCl. Surface enhanced Raman spectroscopy with plasmon sensors was used to investigate the transformations of PVP during electrolysis under the different conditions when Cu particles were and were not formed. For the dispersed nanoparticles in the electrolyte, it was observed that the C=O and C-N peaks of PVP also exhibited a red-shift. It was thus confirmed that PVP was coordinated to both the cathode electrode and dispersed nanoparticles in the electrolyte upon electrochemical reduction.

Original languageEnglish
Pages (from-to)E50-E57
JournalJournal of the Electrochemical Society
Volume165
Issue number2
DOIs
Publication statusPublished - 2018 Jan 1

Fingerprint

Nanoparticles
nanoparticles
Electrolytes
electrolytes
acetates
baths
sulfates
Acetates
Copper Sulfate
Copper
copper
electrolysis
Electrolysis
red shift
Sulfates
Raman spectroscopy
N-vinyl-2-pyrrolidinone
Cathodes
cathodes
Electrodes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Cite this

Effect of poly(N-vinyl-pyrrolidone) on electrochemical production of Cu nanoparticles. / Saito, Mikiko; Ishii, Tomohiro; Fujiwara, Hidemichi; Homma, Takayuki.

In: Journal of the Electrochemical Society, Vol. 165, No. 2, 01.01.2018, p. E50-E57.

Research output: Contribution to journalArticle

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N2 - Cu nanoparticles were synthesized via electrochemical deposition and the effect of the addition of poly(N-vinyl-pyrrolidone) (PVP) and pH on the properties of the nanoparticles was investigated. The Cu nanoparticles were prepared from an electrolyte containing copper acetate (pH 5.50) or copper sulfate (pH 4.14) by collecting the dispersed particles in the solution after electrochemical reduction. With the use of the acetate bath, formation of Cu2O at -0.2 and -1.5 V vs. Ag/AgCl was confirmed. On the other hand, Cu2O formation was not observed with the sulfate bath due to the lower pH, and the Cu nanoparticles could not be obtained at the potential of -1.5 V vs. Ag/AgCl. Surface enhanced Raman spectroscopy with plasmon sensors was used to investigate the transformations of PVP during electrolysis under the different conditions when Cu particles were and were not formed. For the dispersed nanoparticles in the electrolyte, it was observed that the C=O and C-N peaks of PVP also exhibited a red-shift. It was thus confirmed that PVP was coordinated to both the cathode electrode and dispersed nanoparticles in the electrolyte upon electrochemical reduction.

AB - Cu nanoparticles were synthesized via electrochemical deposition and the effect of the addition of poly(N-vinyl-pyrrolidone) (PVP) and pH on the properties of the nanoparticles was investigated. The Cu nanoparticles were prepared from an electrolyte containing copper acetate (pH 5.50) or copper sulfate (pH 4.14) by collecting the dispersed particles in the solution after electrochemical reduction. With the use of the acetate bath, formation of Cu2O at -0.2 and -1.5 V vs. Ag/AgCl was confirmed. On the other hand, Cu2O formation was not observed with the sulfate bath due to the lower pH, and the Cu nanoparticles could not be obtained at the potential of -1.5 V vs. Ag/AgCl. Surface enhanced Raman spectroscopy with plasmon sensors was used to investigate the transformations of PVP during electrolysis under the different conditions when Cu particles were and were not formed. For the dispersed nanoparticles in the electrolyte, it was observed that the C=O and C-N peaks of PVP also exhibited a red-shift. It was thus confirmed that PVP was coordinated to both the cathode electrode and dispersed nanoparticles in the electrolyte upon electrochemical reduction.

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