Investigation of trace interfacial water at silver electrodes in a series of normal alcohols using surface enhanced Raman scattering

Aijin Shen, Jeanne E Pemberton

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The behavior of trace interfacial water and its interaction with Li+ and Br- ions at Ag electrodes in the series of alcohols, methanol, ethanol, propanol, butanol and pentanol is studied using surface-enhanced Raman scattering (SERS). SERS spectra in the v(O-H) region exhibit four bands from the interfacial water species which are a sensitive function of the nature of the solvent, the residual water concentration and the electrode potential. These bands are assigned to water species interacting with specifically adsorbed Br-, Li+ in the outer Helmholtz plane, 'free' water species in the interface, or hydroxide in LiOH microcrystallites precipitated onto the electrode surface. Interfacial water molecules cluster around Li+ and Br- ions. The spectral data suggest pronounced restructuring of the water in the interface in the vicinity of the potential of zero charge.

Original languageEnglish (US)
Pages (from-to)5677-5684
Number of pages8
JournalPhysical Chemistry Chemical Physics
Volume1
Issue number24
DOIs
StatePublished - Dec 15 1999

Fingerprint

Silver
Raman scattering
alcohols
silver
Alcohols
Raman spectra
Electrodes
electrodes
Water
water
Pentanols
Ions
1-Propanol
Butanols
hydroxides
Methanol
ions
ethyl alcohol
Ethanol
methyl alcohol

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Atomic and Molecular Physics, and Optics

Cite this

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abstract = "The behavior of trace interfacial water and its interaction with Li+ and Br- ions at Ag electrodes in the series of alcohols, methanol, ethanol, propanol, butanol and pentanol is studied using surface-enhanced Raman scattering (SERS). SERS spectra in the v(O-H) region exhibit four bands from the interfacial water species which are a sensitive function of the nature of the solvent, the residual water concentration and the electrode potential. These bands are assigned to water species interacting with specifically adsorbed Br-, Li+ in the outer Helmholtz plane, 'free' water species in the interface, or hydroxide in LiOH microcrystallites precipitated onto the electrode surface. Interfacial water molecules cluster around Li+ and Br- ions. The spectral data suggest pronounced restructuring of the water in the interface in the vicinity of the potential of zero charge.",
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AU - Pemberton, Jeanne E

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N2 - The behavior of trace interfacial water and its interaction with Li+ and Br- ions at Ag electrodes in the series of alcohols, methanol, ethanol, propanol, butanol and pentanol is studied using surface-enhanced Raman scattering (SERS). SERS spectra in the v(O-H) region exhibit four bands from the interfacial water species which are a sensitive function of the nature of the solvent, the residual water concentration and the electrode potential. These bands are assigned to water species interacting with specifically adsorbed Br-, Li+ in the outer Helmholtz plane, 'free' water species in the interface, or hydroxide in LiOH microcrystallites precipitated onto the electrode surface. Interfacial water molecules cluster around Li+ and Br- ions. The spectral data suggest pronounced restructuring of the water in the interface in the vicinity of the potential of zero charge.

AB - The behavior of trace interfacial water and its interaction with Li+ and Br- ions at Ag electrodes in the series of alcohols, methanol, ethanol, propanol, butanol and pentanol is studied using surface-enhanced Raman scattering (SERS). SERS spectra in the v(O-H) region exhibit four bands from the interfacial water species which are a sensitive function of the nature of the solvent, the residual water concentration and the electrode potential. These bands are assigned to water species interacting with specifically adsorbed Br-, Li+ in the outer Helmholtz plane, 'free' water species in the interface, or hydroxide in LiOH microcrystallites precipitated onto the electrode surface. Interfacial water molecules cluster around Li+ and Br- ions. The spectral data suggest pronounced restructuring of the water in the interface in the vicinity of the potential of zero charge.

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