In Situ EXAFS Study To Probe Active Centers of Ru Chalcogenide Electrocatalysts During Oxygen Reduction Reaction Full article
Journal |
The Journal of Physical Chemistry B
ISSN: 1520-6106 , E-ISSN: 1520-5207 |
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Output data | Year: 2002, Volume: 106, Number: 7, Pages: 1670-1676 Pages count : 7 DOI: 10.1021/jp011295l | ||||
Tags | Adsorption; Anodes; Catalysis; Electric potential; Oxygen; Polarization; Reduction; Ruthenium compounds | ||||
Authors |
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Affiliations |
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Funding (2)
1 | International Association for the Promotion of Co-operation with Scientists from the New Independent States of the Former Soviet Union | 95-0195 |
2 | Russian Foundation for Basic Research |
Abstract:
Novel cluster Ru chalcogenide materials MoxRuySez and RuxTey were studied in situ using EXAFS in the transmission mode during the oxygen reduction reaction. Reversible changes in the structure of the active center were revealed for the electrochemical reaction as a function of the applied electrode potential. The shift of the potential in the anodic direction from 0.08 to 0.78 V versus rhe (reference hydrogen electrode) in the presence of oxygen resulted in an increase of the Ru−O and simultaneous decrease of the Ru−Ru coordination numbers in the first coordination shell of Ru. Along with the variation of the coordination numbers, we observed reversible changes of the coordination distances: a decrease of the Ru−O and an increase of the Ru−Ru distance with the positive polarization. These changes witness the distortion of the catalytic center upon oxygen adsorption. A tentative mechanism of oxygen activation on RuxXy cluster materials is proposed on the basis of the in situ EXAFS data.
Cite:
Malakhov I.V.
, Nikitenko S.G.
, Savinova E.R.
, Kochubey D.I.
, Alonso-Vante N.
In Situ EXAFS Study To Probe Active Centers of Ru Chalcogenide Electrocatalysts During Oxygen Reduction Reaction
The Journal of Physical Chemistry B. 2002. V.106. N7. P.1670-1676. DOI: 10.1021/jp011295l WOS Scopus РИНЦ
In Situ EXAFS Study To Probe Active Centers of Ru Chalcogenide Electrocatalysts During Oxygen Reduction Reaction
The Journal of Physical Chemistry B. 2002. V.106. N7. P.1670-1676. DOI: 10.1021/jp011295l WOS Scopus РИНЦ
Dates:
Submitted: | Apr 9, 2001 |
Published online: | Jan 29, 2002 |
Published print: | Feb 1, 2002 |
Identifiers:
Web of science | WOS:000173981900022 |
Scopus | 2-s2.0-0037149153 |
Elibrary | 41809939 |
Chemical Abstracts | 2002:76652 |
Chemical Abstracts (print) | 136:285742 |
OpenAlex | W2005503940 |