Dynamic instabilities during the continuous electro-oxidation of CO on poly- and single crystalline Pt electrodes

Sauradip Malkhandi; Antoine Bonnefont; Katharina Krischer

doi:10.1016/j.susc.2008.11.046

Dynamic instabilities during the continuous electro-oxidation of CO on poly- and single crystalline Pt electrodes

Sauradip Malkhandi, Antoine Bonnefont, Katharina Krischer

Associate Professorship of Technical Physics

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

30 Scopus citations

Abstract

Dynamic instabilities during bulk CO electro-oxidation on poly- and single crystalline rotating Pt electrodes in different electrolytes were investigated experimentally. In sulphuric and perchloric electrolytic media, only bistability is observed. The dependence of the width of the bistable regime on some parameters is discussed. The addition of small amounts of chloride ions induces current oscillations under potentiostatic conditions on polycrystalline Pt, Pt(1 1 0) and Pt(1 0 0) electrodes. Existence range, shape and mean frequency of the mainly irregular kinetic oscillations vary significantly with the crystallographic structure of the electrode surface.

Original language	English
Pages (from-to)	1646-1651
Number of pages	6
Journal	Surface Science
Volume	603
Issue number	10-12
DOIs	https://doi.org/10.1016/j.susc.2008.11.046
State	Published - 1 Jun 2009

Keywords

CO oxidation
Oscillations
Surface electrochemistry

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10.1016/j.susc.2008.11.046

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title = "Dynamic instabilities during the continuous electro-oxidation of CO on poly- and single crystalline Pt electrodes",

abstract = "Dynamic instabilities during bulk CO electro-oxidation on poly- and single crystalline rotating Pt electrodes in different electrolytes were investigated experimentally. In sulphuric and perchloric electrolytic media, only bistability is observed. The dependence of the width of the bistable regime on some parameters is discussed. The addition of small amounts of chloride ions induces current oscillations under potentiostatic conditions on polycrystalline Pt, Pt(1 1 0) and Pt(1 0 0) electrodes. Existence range, shape and mean frequency of the mainly irregular kinetic oscillations vary significantly with the crystallographic structure of the electrode surface.",

keywords = "CO oxidation, Oscillations, Surface electrochemistry",

author = "Sauradip Malkhandi and Antoine Bonnefont and Katharina Krischer",

note = "Funding Information: This work was supported by the Deutsche Forschungsgemeinschaft (Project KR 1189/10).",

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T1 - Dynamic instabilities during the continuous electro-oxidation of CO on poly- and single crystalline Pt electrodes

AU - Malkhandi, Sauradip

AU - Bonnefont, Antoine

AU - Krischer, Katharina

N1 - Funding Information: This work was supported by the Deutsche Forschungsgemeinschaft (Project KR 1189/10).

PY - 2009/6/1

Y1 - 2009/6/1

N2 - Dynamic instabilities during bulk CO electro-oxidation on poly- and single crystalline rotating Pt electrodes in different electrolytes were investigated experimentally. In sulphuric and perchloric electrolytic media, only bistability is observed. The dependence of the width of the bistable regime on some parameters is discussed. The addition of small amounts of chloride ions induces current oscillations under potentiostatic conditions on polycrystalline Pt, Pt(1 1 0) and Pt(1 0 0) electrodes. Existence range, shape and mean frequency of the mainly irregular kinetic oscillations vary significantly with the crystallographic structure of the electrode surface.

AB - Dynamic instabilities during bulk CO electro-oxidation on poly- and single crystalline rotating Pt electrodes in different electrolytes were investigated experimentally. In sulphuric and perchloric electrolytic media, only bistability is observed. The dependence of the width of the bistable regime on some parameters is discussed. The addition of small amounts of chloride ions induces current oscillations under potentiostatic conditions on polycrystalline Pt, Pt(1 1 0) and Pt(1 0 0) electrodes. Existence range, shape and mean frequency of the mainly irregular kinetic oscillations vary significantly with the crystallographic structure of the electrode surface.

KW - CO oxidation

KW - Oscillations

KW - Surface electrochemistry

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M3 - Article

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SN - 0039-6028

VL - 603

SP - 1646

EP - 1651

JO - Surface Science

JF - Surface Science

IS - 10-12

ER -

Dynamic instabilities during the continuous electro-oxidation of CO on poly- and single crystalline Pt electrodes

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