In situ Ru LII and LIII edge x-ray absorption near edge structure of electrodeposited ruthenium dioxide films

Ionel C. Stefan; Yibo Mo; Mark R. Antonio; Daniel Alberto Scherson

doi:10.1021/jp026300f

In situ Ru L_II and L_III edge x-ray absorption near edge structure of electrodeposited ruthenium dioxide films

Ionel C. Stefan, Yibo Mo, Mark R. Antonio, Daniel Alberto Scherson^*

^*Corresponding author for this work

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

22 Citations (Scopus)

Abstract

The electronic properties of electrodeposited Ru oxide films supported on Au have been examined in situ by Ru L_III and L_II edge X-ray absorption near edge structure (XANES) in acid media. The results obtained are consistent with the main voltammetric peak centered at 0.7 V vs RHE as being attributed to a redox couple involving formally Ru³⁺ and Ru⁴⁺ sites in the lattice. A linear correlation was found between the extent of oxidation of the film as derived from a deconvolution of the spectral features and the charge as determined from coulometric analysis of the voltammetric curves. This observation suggests that only two Ru-based redox states are involved in this electrochemical process.

Original language	English
Pages (from-to)	12373-12375
Number of pages	3
Journal	Journal of Physical Chemistry B
Volume	106
Issue number	48
DOIs	https://doi.org/10.1021/jp026300f
Publication status	Published - 2002 Dec 5
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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title = "In situ Ru LII and LIII edge x-ray absorption near edge structure of electrodeposited ruthenium dioxide films",

abstract = "The electronic properties of electrodeposited Ru oxide films supported on Au have been examined in situ by Ru LIII and LII edge X-ray absorption near edge structure (XANES) in acid media. The results obtained are consistent with the main voltammetric peak centered at 0.7 V vs RHE as being attributed to a redox couple involving formally Ru3+ and Ru4+ sites in the lattice. A linear correlation was found between the extent of oxidation of the film as derived from a deconvolution of the spectral features and the charge as determined from coulometric analysis of the voltammetric curves. This observation suggests that only two Ru-based redox states are involved in this electrochemical process.",

author = "Stefan, {Ionel C.} and Yibo Mo and Antonio, {Mark R.} and Scherson, {Daniel Alberto}",

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T1 - In situ Ru LII and LIII edge x-ray absorption near edge structure of electrodeposited ruthenium dioxide films

AU - Stefan, Ionel C.

AU - Mo, Yibo

AU - Antonio, Mark R.

AU - Scherson, Daniel Alberto

PY - 2002/12/5

Y1 - 2002/12/5

N2 - The electronic properties of electrodeposited Ru oxide films supported on Au have been examined in situ by Ru LIII and LII edge X-ray absorption near edge structure (XANES) in acid media. The results obtained are consistent with the main voltammetric peak centered at 0.7 V vs RHE as being attributed to a redox couple involving formally Ru3+ and Ru4+ sites in the lattice. A linear correlation was found between the extent of oxidation of the film as derived from a deconvolution of the spectral features and the charge as determined from coulometric analysis of the voltammetric curves. This observation suggests that only two Ru-based redox states are involved in this electrochemical process.

AB - The electronic properties of electrodeposited Ru oxide films supported on Au have been examined in situ by Ru LIII and LII edge X-ray absorption near edge structure (XANES) in acid media. The results obtained are consistent with the main voltammetric peak centered at 0.7 V vs RHE as being attributed to a redox couple involving formally Ru3+ and Ru4+ sites in the lattice. A linear correlation was found between the extent of oxidation of the film as derived from a deconvolution of the spectral features and the charge as determined from coulometric analysis of the voltammetric curves. This observation suggests that only two Ru-based redox states are involved in this electrochemical process.

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In situ Ru L_II and L_III edge x-ray absorption near edge structure of electrodeposited ruthenium dioxide films

Abstract

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