The catalytic oxidation of carbon monoxide at the platinum/electrolyte interface investigated by optical second harmonic generation (SHG): Comparison of Pt(111) and Pt(997) electrode surfaces

W. Akemann; K. A. Friedrich; U. Linke; U. Stimming

doi:10.1016/S0039-6028(97)01043-1

The catalytic oxidation of carbon monoxide at the platinum/electrolyte interface investigated by optical second harmonic generation (SHG): Comparison of Pt(111) and Pt(997) electrode surfaces

W. Akemann, K. A. Friedrich, U. Linke, U. Stimming

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Abstract

The anodic oxidation of CO on nominal Pt(111) and Pt(997) electrodes in a CO-saturated 0.1 M HClO₄ electrolyte is studied by optical second harmonic generation (SHG) at a wavelength of 280 nm to monitor the CO adlayer under steady-state reaction conditions in the potential range between 50 mV and 1030 mV vs. RHE. Regarding the catalytic activity of the electrodes, two potential regimes are distinguishable: in the low potential regime, characterized by the presence of a dense CO overlayer, the reaction yield is higher on Pt(997) than on Pt(111). Positive of the overlayer stripping potential [880 mV for Pt(111) and 780 mV for Pt(997)] the Pt(997) electrode exhibits an inferior reactivity. The results confirm the structure sensitivity of anodic CO oxidation on Pt electrode surfaces.

Original language	English
Pages (from-to)	571-575
Number of pages	5
Journal	Surface Science
Volume	402-404
DOIs	https://doi.org/10.1016/S0039-6028(97)01043-1
State	Published - 15 May 1998

Keywords

Carbon monoxide
Electrochemical methods
Molecule-solid reactions
Oxidation
Platinum
Second harmonic generation
Single crystal surfaces
Solid-liquid interfaces
Surface chemical reaction

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10.1016/S0039-6028(97)01043-1

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@article{c0d29486773e42bcbabcac0f21208932,

title = "The catalytic oxidation of carbon monoxide at the platinum/electrolyte interface investigated by optical second harmonic generation (SHG): Comparison of Pt(111) and Pt(997) electrode surfaces",

abstract = "The anodic oxidation of CO on nominal Pt(111) and Pt(997) electrodes in a CO-saturated 0.1 M HClO4 electrolyte is studied by optical second harmonic generation (SHG) at a wavelength of 280 nm to monitor the CO adlayer under steady-state reaction conditions in the potential range between 50 mV and 1030 mV vs. RHE. Regarding the catalytic activity of the electrodes, two potential regimes are distinguishable: in the low potential regime, characterized by the presence of a dense CO overlayer, the reaction yield is higher on Pt(997) than on Pt(111). Positive of the overlayer stripping potential [880 mV for Pt(111) and 780 mV for Pt(997)] the Pt(997) electrode exhibits an inferior reactivity. The results confirm the structure sensitivity of anodic CO oxidation on Pt electrode surfaces.",

keywords = "Carbon monoxide, Electrochemical methods, Molecule-solid reactions, Oxidation, Platinum, Second harmonic generation, Single crystal surfaces, Solid-liquid interfaces, Surface chemical reaction",

author = "W. Akemann and Friedrich, {K. A.} and U. Linke and U. Stimming",

year = "1998",

month = may,

day = "15",

doi = "10.1016/S0039-6028(97)01043-1",

language = "English",

volume = "402-404",

pages = "571--575",

journal = "Surface Science",

issn = "0039-6028",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - The catalytic oxidation of carbon monoxide at the platinum/electrolyte interface investigated by optical second harmonic generation (SHG)

T2 - Comparison of Pt(111) and Pt(997) electrode surfaces

AU - Akemann, W.

AU - Friedrich, K. A.

AU - Linke, U.

AU - Stimming, U.

PY - 1998/5/15

Y1 - 1998/5/15

N2 - The anodic oxidation of CO on nominal Pt(111) and Pt(997) electrodes in a CO-saturated 0.1 M HClO4 electrolyte is studied by optical second harmonic generation (SHG) at a wavelength of 280 nm to monitor the CO adlayer under steady-state reaction conditions in the potential range between 50 mV and 1030 mV vs. RHE. Regarding the catalytic activity of the electrodes, two potential regimes are distinguishable: in the low potential regime, characterized by the presence of a dense CO overlayer, the reaction yield is higher on Pt(997) than on Pt(111). Positive of the overlayer stripping potential [880 mV for Pt(111) and 780 mV for Pt(997)] the Pt(997) electrode exhibits an inferior reactivity. The results confirm the structure sensitivity of anodic CO oxidation on Pt electrode surfaces.

AB - The anodic oxidation of CO on nominal Pt(111) and Pt(997) electrodes in a CO-saturated 0.1 M HClO4 electrolyte is studied by optical second harmonic generation (SHG) at a wavelength of 280 nm to monitor the CO adlayer under steady-state reaction conditions in the potential range between 50 mV and 1030 mV vs. RHE. Regarding the catalytic activity of the electrodes, two potential regimes are distinguishable: in the low potential regime, characterized by the presence of a dense CO overlayer, the reaction yield is higher on Pt(997) than on Pt(111). Positive of the overlayer stripping potential [880 mV for Pt(111) and 780 mV for Pt(997)] the Pt(997) electrode exhibits an inferior reactivity. The results confirm the structure sensitivity of anodic CO oxidation on Pt electrode surfaces.

KW - Carbon monoxide

KW - Electrochemical methods

KW - Molecule-solid reactions

KW - Oxidation

KW - Platinum

KW - Second harmonic generation

KW - Single crystal surfaces

KW - Solid-liquid interfaces

KW - Surface chemical reaction

UR - http://www.scopus.com/inward/record.url?scp=0031630005&partnerID=8YFLogxK

U2 - 10.1016/S0039-6028(97)01043-1

DO - 10.1016/S0039-6028(97)01043-1

M3 - Article

AN - SCOPUS:0031630005

SN - 0039-6028

VL - 402-404

SP - 571

EP - 575

JO - Surface Science

JF - Surface Science

ER -

The catalytic oxidation of carbon monoxide at the platinum/electrolyte interface investigated by optical second harmonic generation (SHG): Comparison of Pt(111) and Pt(997) electrode surfaces

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Keywords

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