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Formation, atomic distribution and mixing energy in two-dimensional PdxAg1-x surface alloys on Pd(111)

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Formation, atomic distribution and mixing energy in two-dimensional PdxAg1-x surface alloys on Pd(111). / Engstfeld, A. K.; Hoster, H. E.; Behm, R. J.

In: Physical Chemistry Chemical Physics, Vol. 14, No. 30, 14.08.2012, p. 10754-10761.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Engstfeld, AK, Hoster, HE & Behm, RJ 2012, 'Formation, atomic distribution and mixing energy in two-dimensional PdxAg1-x surface alloys on Pd(111)', Physical Chemistry Chemical Physics, vol. 14, no. 30, pp. 10754-10761. https://doi.org/10.1039/c2cp41104k

APA

Engstfeld, A. K., Hoster, H. E., & Behm, R. J. (2012). Formation, atomic distribution and mixing energy in two-dimensional PdxAg1-x surface alloys on Pd(111). Physical Chemistry Chemical Physics, 14(30), 10754-10761. https://doi.org/10.1039/c2cp41104k

Vancouver

Engstfeld AK, Hoster HE, Behm RJ. Formation, atomic distribution and mixing energy in two-dimensional PdxAg1-x surface alloys on Pd(111). Physical Chemistry Chemical Physics. 2012 Aug 14;14(30):10754-10761. doi: 10.1039/c2cp41104k

Author

Engstfeld, A. K. ; Hoster, H. E. ; Behm, R. J. / Formation, atomic distribution and mixing energy in two-dimensional PdxAg1-x surface alloys on Pd(111). In: Physical Chemistry Chemical Physics. 2012 ; Vol. 14, No. 30. pp. 10754-10761.

Bibtex

@article{7c541ebd8d8e46abaad3782c45fe728f,
title = "Formation, atomic distribution and mixing energy in two-dimensional PdxAg1-x surface alloys on Pd(111)",
abstract = "The formation and atom distribution in two-dimensional PdxAg1-x/Pd(111) monolayer surface alloys were studied by high resolution scanning tunnelling microscopy (STM) with chemical contrast. From short-range order (SRO) parameters, we calculate preferences for like or unlike nearest neighbours to elucidate the mixing behaviour of the two components for various sub monolayer Ag surface contents. In the regime of low Ag surface contents (60% Ag) result in a disperse distribution of the atoms in the surface. Effective pair interactions (EPIs) were derived by comparing the measured distribution with distributions obtained using Monte Carlo (MC) simulations. From the EPIs, we derived a function for the mixing energy, which can describe the change from clustering to a disperse distribution. The effects of the resulting surface atom distributions and of the Ag coverage dependent surface mixing/demixing on catalytic reactions are discussed.",
keywords = "SCANNING-TUNNELING-MICROSCOPY, SHORT-RANGE ORDER, PD-AG CATALYST, CO ADSORPTION, SELECTIVE HYDROGENATION, ETHYLENE HYDROGENATION, PDAG/PD(111) SURFACE, BIMETALLIC SURFACES, METAL-SURFACES, ACETYLENE",
author = "Engstfeld, {A. K.} and Hoster, {H. E.} and Behm, {R. J.}",
year = "2012",
month = aug,
day = "14",
doi = "10.1039/c2cp41104k",
language = "English",
volume = "14",
pages = "10754--10761",
journal = "Physical Chemistry Chemical Physics",
issn = "1463-9076",
publisher = "Royal Society of Chemistry",
number = "30",

}

RIS

TY - JOUR

T1 - Formation, atomic distribution and mixing energy in two-dimensional PdxAg1-x surface alloys on Pd(111)

AU - Engstfeld, A. K.

AU - Hoster, H. E.

AU - Behm, R. J.

PY - 2012/8/14

Y1 - 2012/8/14

N2 - The formation and atom distribution in two-dimensional PdxAg1-x/Pd(111) monolayer surface alloys were studied by high resolution scanning tunnelling microscopy (STM) with chemical contrast. From short-range order (SRO) parameters, we calculate preferences for like or unlike nearest neighbours to elucidate the mixing behaviour of the two components for various sub monolayer Ag surface contents. In the regime of low Ag surface contents (60% Ag) result in a disperse distribution of the atoms in the surface. Effective pair interactions (EPIs) were derived by comparing the measured distribution with distributions obtained using Monte Carlo (MC) simulations. From the EPIs, we derived a function for the mixing energy, which can describe the change from clustering to a disperse distribution. The effects of the resulting surface atom distributions and of the Ag coverage dependent surface mixing/demixing on catalytic reactions are discussed.

AB - The formation and atom distribution in two-dimensional PdxAg1-x/Pd(111) monolayer surface alloys were studied by high resolution scanning tunnelling microscopy (STM) with chemical contrast. From short-range order (SRO) parameters, we calculate preferences for like or unlike nearest neighbours to elucidate the mixing behaviour of the two components for various sub monolayer Ag surface contents. In the regime of low Ag surface contents (60% Ag) result in a disperse distribution of the atoms in the surface. Effective pair interactions (EPIs) were derived by comparing the measured distribution with distributions obtained using Monte Carlo (MC) simulations. From the EPIs, we derived a function for the mixing energy, which can describe the change from clustering to a disperse distribution. The effects of the resulting surface atom distributions and of the Ag coverage dependent surface mixing/demixing on catalytic reactions are discussed.

KW - SCANNING-TUNNELING-MICROSCOPY

KW - SHORT-RANGE ORDER

KW - PD-AG CATALYST

KW - CO ADSORPTION

KW - SELECTIVE HYDROGENATION

KW - ETHYLENE HYDROGENATION

KW - PDAG/PD(111) SURFACE

KW - BIMETALLIC SURFACES

KW - METAL-SURFACES

KW - ACETYLENE

U2 - 10.1039/c2cp41104k

DO - 10.1039/c2cp41104k

M3 - Journal article

VL - 14

SP - 10754

EP - 10761

JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

SN - 1463-9076

IS - 30

ER -