Self-promotion mechanism for CO electrooxidation on gold

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Self-promotion mechanism for CO electrooxidation on gold. / Rodriguez, Paramaconi; Garcia-Araez, Nuria; Koper, M. T M; Rodriguez, Paramaconi.

In: Physical Chemistry Chemical Physics, Vol. 12, No. 32, 28.08.2010, p. 9373-9380.

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Rodriguez, Paramaconi ; Garcia-Araez, Nuria ; Koper, M. T M ; Rodriguez, Paramaconi. / Self-promotion mechanism for CO electrooxidation on gold. In: Physical Chemistry Chemical Physics. 2010 ; Vol. 12, No. 32. pp. 9373-9380.

Bibtex

@article{ab3963c5169942608b0aa25f0dd6a136,
title = "Self-promotion mechanism for CO electrooxidation on gold",
abstract = "CO electrooxidation on Au(111), Au(100) and Au(110) electrodes in 0.1 M HClO4 and 0.1 M NaOH solutions has been studied by means of voltammetric measurements with hanging meniscus rotating bead-type electrodes. It is found that the reaction order in CO concentration is close to unity at potentials close to the onset of CO oxidation, and then it becomes higher than unity at higher potentials for all studied surfaces except for Au(111) in 0.1 M HClO4. This behavior indicates that CO oxidation on gold takes place through a self-promotion mechanism, in which the presence of CO on the gold surface enhances the adsorption of its own oxidant. Specifically, this mechanism offers a plausible explanation for the higher catalytic activity in alkaline solutions, since CO adsorption is stronger under these conditions, and thus it can lead to a higher enhancement of the adsorption of the oxidant species.",
author = "Paramaconi Rodriguez and Nuria Garcia-Araez and Koper, {M. T M} and Paramaconi Rodriguez",
year = "2010",
month = aug,
day = "28",
doi = "10.1039/b926365a",
language = "English",
volume = "12",
pages = "9373--9380",
journal = "Physical Chemistry Chemical Physics",
issn = "1463-9076",
publisher = "Royal Society of Chemistry",
number = "32",

}

RIS

TY - JOUR

T1 - Self-promotion mechanism for CO electrooxidation on gold

AU - Rodriguez, Paramaconi

AU - Garcia-Araez, Nuria

AU - Koper, M. T M

AU - Rodriguez, Paramaconi

PY - 2010/8/28

Y1 - 2010/8/28

N2 - CO electrooxidation on Au(111), Au(100) and Au(110) electrodes in 0.1 M HClO4 and 0.1 M NaOH solutions has been studied by means of voltammetric measurements with hanging meniscus rotating bead-type electrodes. It is found that the reaction order in CO concentration is close to unity at potentials close to the onset of CO oxidation, and then it becomes higher than unity at higher potentials for all studied surfaces except for Au(111) in 0.1 M HClO4. This behavior indicates that CO oxidation on gold takes place through a self-promotion mechanism, in which the presence of CO on the gold surface enhances the adsorption of its own oxidant. Specifically, this mechanism offers a plausible explanation for the higher catalytic activity in alkaline solutions, since CO adsorption is stronger under these conditions, and thus it can lead to a higher enhancement of the adsorption of the oxidant species.

AB - CO electrooxidation on Au(111), Au(100) and Au(110) electrodes in 0.1 M HClO4 and 0.1 M NaOH solutions has been studied by means of voltammetric measurements with hanging meniscus rotating bead-type electrodes. It is found that the reaction order in CO concentration is close to unity at potentials close to the onset of CO oxidation, and then it becomes higher than unity at higher potentials for all studied surfaces except for Au(111) in 0.1 M HClO4. This behavior indicates that CO oxidation on gold takes place through a self-promotion mechanism, in which the presence of CO on the gold surface enhances the adsorption of its own oxidant. Specifically, this mechanism offers a plausible explanation for the higher catalytic activity in alkaline solutions, since CO adsorption is stronger under these conditions, and thus it can lead to a higher enhancement of the adsorption of the oxidant species.

UR - http://www.scopus.com/inward/record.url?scp=77955383106&partnerID=8YFLogxK

U2 - 10.1039/b926365a

DO - 10.1039/b926365a

M3 - Article

AN - SCOPUS:77955383106

VL - 12

SP - 9373

EP - 9380

JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

SN - 1463-9076

IS - 32

ER -