In situ surface enhanced Raman scattering of ruthenium dioxide films in acid electrolytes

Yibo Mo; Wen Bin Cai; Jian Dong; Paul R. Carey; Daniel Alberto Scherson

doi:10.1149/1.1387226

In situ surface enhanced Raman scattering of ruthenium dioxide films in acid electrolytes

Yibo Mo, Wen Bin Cai, Jian Dong, Paul R. Carey, Daniel Alberto Scherson^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

Vibrational aspects of thin RuO₂ films (ca. 7-8 × 10^-8 mol Ru sites/cm²) electrodeposited on preroughened Au electrodes were investigated in situ in 0.50 M H₂SO₄ aqueous solutions using surface enhanced Raman scattering (SERS). Prominent peaks could be observed for the material in the predominantly fully oxidized state (+0.80 V vs. SCE) at 456 and 710 cm^-1, and predominantly fully reduced state (+0.10 V vs. SCE) at 614 and 750 cm^-1. The first set of features is in good agreement with in situ SERS measurements reported by Chan et al. for oxidized metallic Ru films in acid electrolytes polarized at high potentials and ascribed by those authors to a hydrated form of Ru oxide in the 4+ formal oxidation state. Based on our recent in situ Ru K-edge X-ray absorption fine structure of thicker RuO₂ films prepared by the same procedure employed in this work, the peaks observed for the first time for the predominantly reduced film are attributed to a highly disordered oxide incorporating Ru sites in the 3+ oxidation state.

Original language	English
Journal	Electrochemical and Solid-State Letters
Volume	4
Issue number	9
DOIs	https://doi.org/10.1149/1.1387226
Publication status	Published - 2001 Sept 1
Externally published	Yes

ASJC Scopus subject areas

Chemical Engineering(all)
Materials Science(all)
Physical and Theoretical Chemistry
Electrical and Electronic Engineering
Electrochemistry

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title = "In situ surface enhanced Raman scattering of ruthenium dioxide films in acid electrolytes",

abstract = "Vibrational aspects of thin RuO2 films (ca. 7-8 × 10-8 mol Ru sites/cm2) electrodeposited on preroughened Au electrodes were investigated in situ in 0.50 M H2SO4 aqueous solutions using surface enhanced Raman scattering (SERS). Prominent peaks could be observed for the material in the predominantly fully oxidized state (+0.80 V vs. SCE) at 456 and 710 cm-1, and predominantly fully reduced state (+0.10 V vs. SCE) at 614 and 750 cm-1. The first set of features is in good agreement with in situ SERS measurements reported by Chan et al. for oxidized metallic Ru films in acid electrolytes polarized at high potentials and ascribed by those authors to a hydrated form of Ru oxide in the 4+ formal oxidation state. Based on our recent in situ Ru K-edge X-ray absorption fine structure of thicker RuO2 films prepared by the same procedure employed in this work, the peaks observed for the first time for the predominantly reduced film are attributed to a highly disordered oxide incorporating Ru sites in the 3+ oxidation state.",

author = "Yibo Mo and Cai, {Wen Bin} and Jian Dong and Carey, {Paul R.} and Scherson, {Daniel Alberto}",

year = "2001",

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doi = "10.1149/1.1387226",

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T1 - In situ surface enhanced Raman scattering of ruthenium dioxide films in acid electrolytes

AU - Mo, Yibo

AU - Cai, Wen Bin

AU - Dong, Jian

AU - Carey, Paul R.

AU - Scherson, Daniel Alberto

PY - 2001/9/1

Y1 - 2001/9/1

N2 - Vibrational aspects of thin RuO2 films (ca. 7-8 × 10-8 mol Ru sites/cm2) electrodeposited on preroughened Au electrodes were investigated in situ in 0.50 M H2SO4 aqueous solutions using surface enhanced Raman scattering (SERS). Prominent peaks could be observed for the material in the predominantly fully oxidized state (+0.80 V vs. SCE) at 456 and 710 cm-1, and predominantly fully reduced state (+0.10 V vs. SCE) at 614 and 750 cm-1. The first set of features is in good agreement with in situ SERS measurements reported by Chan et al. for oxidized metallic Ru films in acid electrolytes polarized at high potentials and ascribed by those authors to a hydrated form of Ru oxide in the 4+ formal oxidation state. Based on our recent in situ Ru K-edge X-ray absorption fine structure of thicker RuO2 films prepared by the same procedure employed in this work, the peaks observed for the first time for the predominantly reduced film are attributed to a highly disordered oxide incorporating Ru sites in the 3+ oxidation state.

AB - Vibrational aspects of thin RuO2 films (ca. 7-8 × 10-8 mol Ru sites/cm2) electrodeposited on preroughened Au electrodes were investigated in situ in 0.50 M H2SO4 aqueous solutions using surface enhanced Raman scattering (SERS). Prominent peaks could be observed for the material in the predominantly fully oxidized state (+0.80 V vs. SCE) at 456 and 710 cm-1, and predominantly fully reduced state (+0.10 V vs. SCE) at 614 and 750 cm-1. The first set of features is in good agreement with in situ SERS measurements reported by Chan et al. for oxidized metallic Ru films in acid electrolytes polarized at high potentials and ascribed by those authors to a hydrated form of Ru oxide in the 4+ formal oxidation state. Based on our recent in situ Ru K-edge X-ray absorption fine structure of thicker RuO2 films prepared by the same procedure employed in this work, the peaks observed for the first time for the predominantly reduced film are attributed to a highly disordered oxide incorporating Ru sites in the 3+ oxidation state.

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JO - Electrochemical and Solid-State Letters

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In situ surface enhanced Raman scattering of ruthenium dioxide films in acid electrolytes

Abstract

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