Chemisorption bond energies of Lewis acids and bases on oxygen modified Mo(100) surfaces

J. E. Deffeyes; A. Horlacher Smith; P. C. Stair

doi:10.1016/0039-6028(85)90850-7

Chemisorption bond energies of Lewis acids and bases on oxygen modified Mo(100) surfaces

J. E. Deffeyes^*, A. Horlacher Smith, P. C. Stair

^*Corresponding author for this work

Chemistry

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

30 Scopus citations

Abstract

The acid-base properties of three molybdenum (100) surfaces chemically modified by 1.5, 1.2, and 1.0 monolayers (ML) of atomic oxygen were investigated by thermal desorption spectroscopy using a series of molecular Lewis bases. The molecules used in this study were of three types, hard Lewis bases, ammonia and dimethylether, soft Lewis bases, phosphine, ethene and propene, and two π acids, carbon monoxide and 3,3,3-trifluoropropene. The trends in desorption energies are consistent with the expectation that the molecules would adsorb at localized, acidic surface sites. The desorption energies are correlated with proton affinities, and the 1.5 ML oxygen modified surface was found to most resemble a gas phase proton.

Original language	English (US)
Pages (from-to)	79-98
Number of pages	20
Journal	Surface Science
Volume	163
Issue number	1
DOIs	https://doi.org/10.1016/0039-6028(85)90850-7
State	Published - Nov 1 1985

Funding

This research was partially supported by the National Science Foundation under Grant No. CHE-8206104. Acknowledgement is made to the Donors of The Petroleum Research Fund, administered by the American Chemical Society, for the partial support of this research. The measurements were carried out in the Surface Science Facility of the Northwestern University Materials Research Center, supported in part under the NSF-MRL program (Grant No. DMR-8216972)

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/0039-6028(85)90850-7

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title = "Chemisorption bond energies of Lewis acids and bases on oxygen modified Mo(100) surfaces",

abstract = "The acid-base properties of three molybdenum (100) surfaces chemically modified by 1.5, 1.2, and 1.0 monolayers (ML) of atomic oxygen were investigated by thermal desorption spectroscopy using a series of molecular Lewis bases. The molecules used in this study were of three types, hard Lewis bases, ammonia and dimethylether, soft Lewis bases, phosphine, ethene and propene, and two π acids, carbon monoxide and 3,3,3-trifluoropropene. The trends in desorption energies are consistent with the expectation that the molecules would adsorb at localized, acidic surface sites. The desorption energies are correlated with proton affinities, and the 1.5 ML oxygen modified surface was found to most resemble a gas phase proton.",

author = "Deffeyes, {J. E.} and Smith, {A. Horlacher} and Stair, {P. C.}",

note = "Funding Information: This research was partially supported by the National Science Foundation under Grant No. CHE-8206104. Acknowledgement is made to the Donors of The Petroleum Research Fund, administered by the American Chemical Society, for the partial support of this research. The measurements were carried out in the Surface Science Facility of the Northwestern University Materials Research Center, supported in part under the NSF-MRL program (Grant No. DMR-8216972)",

year = "1985",

month = nov,

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doi = "10.1016/0039-6028(85)90850-7",

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T1 - Chemisorption bond energies of Lewis acids and bases on oxygen modified Mo(100) surfaces

AU - Deffeyes, J. E.

AU - Smith, A. Horlacher

AU - Stair, P. C.

N1 - Funding Information: This research was partially supported by the National Science Foundation under Grant No. CHE-8206104. Acknowledgement is made to the Donors of The Petroleum Research Fund, administered by the American Chemical Society, for the partial support of this research. The measurements were carried out in the Surface Science Facility of the Northwestern University Materials Research Center, supported in part under the NSF-MRL program (Grant No. DMR-8216972)

PY - 1985/11/1

Y1 - 1985/11/1

N2 - The acid-base properties of three molybdenum (100) surfaces chemically modified by 1.5, 1.2, and 1.0 monolayers (ML) of atomic oxygen were investigated by thermal desorption spectroscopy using a series of molecular Lewis bases. The molecules used in this study were of three types, hard Lewis bases, ammonia and dimethylether, soft Lewis bases, phosphine, ethene and propene, and two π acids, carbon monoxide and 3,3,3-trifluoropropene. The trends in desorption energies are consistent with the expectation that the molecules would adsorb at localized, acidic surface sites. The desorption energies are correlated with proton affinities, and the 1.5 ML oxygen modified surface was found to most resemble a gas phase proton.

AB - The acid-base properties of three molybdenum (100) surfaces chemically modified by 1.5, 1.2, and 1.0 monolayers (ML) of atomic oxygen were investigated by thermal desorption spectroscopy using a series of molecular Lewis bases. The molecules used in this study were of three types, hard Lewis bases, ammonia and dimethylether, soft Lewis bases, phosphine, ethene and propene, and two π acids, carbon monoxide and 3,3,3-trifluoropropene. The trends in desorption energies are consistent with the expectation that the molecules would adsorb at localized, acidic surface sites. The desorption energies are correlated with proton affinities, and the 1.5 ML oxygen modified surface was found to most resemble a gas phase proton.

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U2 - 10.1016/0039-6028(85)90850-7

DO - 10.1016/0039-6028(85)90850-7

M3 - Article

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SN - 0039-6028

VL - 163

SP - 79

EP - 98

JO - Surface Science

JF - Surface Science

IS - 1

ER -

Chemisorption bond energies of Lewis acids and bases on oxygen modified Mo(100) surfaces

Abstract

Funding

ASJC Scopus subject areas

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