Hydrogenation and H, D Exchange studies of ethylidyne (CCH3) on Rh(111) crystal surfaces at 1 atm pressure using high resolution electron energy loss spectroscopy

B. E. Koel; B. E. Bent; G. A. Somorjai

doi:10.1016/0039-6028(84)90238-3

Hydrogenation and H, D Exchange studies of ethylidyne (CCH₃) on Rh(111) crystal surfaces at 1 atm pressure using high resolution electron energy loss spectroscopy

B. E. Koel, B. E. Bent, G. A. Somorjai

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127 Scopus citations

Abstract

We have combined high resolution electron energy loss spectroscopy (HREELS) with a high-pressure/low-pressure (HPLP) system to study the behavior of the monolayer structure of stable hydrocarbon species that form on single-crystal metal surfaces during catalytic reactions at atmospheric pressure. We find that a monolayer of adsorbed ethylidyne (CCH₃) on Rh(111) at 310 K does not hydrogenate to ethylene or ethane in one atmosphere of static D₂. The methyl group hydrogens exchange with deuterium is a slow process. The amount of exchange depends strongly on the amount of uncovered, bare-metal surface, but little on the hydrogen pressure. A mechanism for H, D exchange involving ethylidene (CHCH₃) as an intermediate is proposed.

Original language	English (US)
Pages (from-to)	211-228
Number of pages	18
Journal	Surface Science
Volume	146
Issue number	1
DOIs	https://doi.org/10.1016/0039-6028(84)90238-3
State	Published - Oct 2 1984
Externally published	Yes

All Science Journal Classification (ASJC) codes

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

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10.1016/0039-6028(84)90238-3

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title = "Hydrogenation and H, D Exchange studies of ethylidyne (CCH3) on Rh(111) crystal surfaces at 1 atm pressure using high resolution electron energy loss spectroscopy",

abstract = "We have combined high resolution electron energy loss spectroscopy (HREELS) with a high-pressure/low-pressure (HPLP) system to study the behavior of the monolayer structure of stable hydrocarbon species that form on single-crystal metal surfaces during catalytic reactions at atmospheric pressure. We find that a monolayer of adsorbed ethylidyne (CCH3) on Rh(111) at 310 K does not hydrogenate to ethylene or ethane in one atmosphere of static D2. The methyl group hydrogens exchange with deuterium is a slow process. The amount of exchange depends strongly on the amount of uncovered, bare-metal surface, but little on the hydrogen pressure. A mechanism for H, D exchange involving ethylidene (CHCH3) as an intermediate is proposed.",

author = "Koel, {B. E.} and Bent, {B. E.} and Somorjai, {G. A.}",

note = "Funding Information: This work was supported by the Director, Office of Energy Research, Office of Basic Energy Sciences, Materials Sciences Division of the US Department of Energy under contract Number DE-AC03-76SF00098. One of us, B.E.B., would like to acknowledge the support of an NSF graduate fellowship. We want to thank Dr. P. Davies for design of the HPLP apparatus and HREELS power supply and F. Zaera for his critical comments and suggestions.",

year = "1984",

month = oct,

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doi = "10.1016/0039-6028(84)90238-3",

language = "English (US)",

volume = "146",

pages = "211--228",

journal = "Surface Science",

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publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Hydrogenation and H, D Exchange studies of ethylidyne (CCH3) on Rh(111) crystal surfaces at 1 atm pressure using high resolution electron energy loss spectroscopy

AU - Koel, B. E.

AU - Bent, B. E.

AU - Somorjai, G. A.

N1 - Funding Information: This work was supported by the Director, Office of Energy Research, Office of Basic Energy Sciences, Materials Sciences Division of the US Department of Energy under contract Number DE-AC03-76SF00098. One of us, B.E.B., would like to acknowledge the support of an NSF graduate fellowship. We want to thank Dr. P. Davies for design of the HPLP apparatus and HREELS power supply and F. Zaera for his critical comments and suggestions.

PY - 1984/10/2

Y1 - 1984/10/2

N2 - We have combined high resolution electron energy loss spectroscopy (HREELS) with a high-pressure/low-pressure (HPLP) system to study the behavior of the monolayer structure of stable hydrocarbon species that form on single-crystal metal surfaces during catalytic reactions at atmospheric pressure. We find that a monolayer of adsorbed ethylidyne (CCH3) on Rh(111) at 310 K does not hydrogenate to ethylene or ethane in one atmosphere of static D2. The methyl group hydrogens exchange with deuterium is a slow process. The amount of exchange depends strongly on the amount of uncovered, bare-metal surface, but little on the hydrogen pressure. A mechanism for H, D exchange involving ethylidene (CHCH3) as an intermediate is proposed.

AB - We have combined high resolution electron energy loss spectroscopy (HREELS) with a high-pressure/low-pressure (HPLP) system to study the behavior of the monolayer structure of stable hydrocarbon species that form on single-crystal metal surfaces during catalytic reactions at atmospheric pressure. We find that a monolayer of adsorbed ethylidyne (CCH3) on Rh(111) at 310 K does not hydrogenate to ethylene or ethane in one atmosphere of static D2. The methyl group hydrogens exchange with deuterium is a slow process. The amount of exchange depends strongly on the amount of uncovered, bare-metal surface, but little on the hydrogen pressure. A mechanism for H, D exchange involving ethylidene (CHCH3) as an intermediate is proposed.

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U2 - 10.1016/0039-6028(84)90238-3

DO - 10.1016/0039-6028(84)90238-3

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SN - 0039-6028

VL - 146

SP - 211

EP - 228

JO - Surface Science

JF - Surface Science

IS - 1

ER -

Hydrogenation and H, D Exchange studies of ethylidyne (CCH₃) on Rh(111) crystal surfaces at 1 atm pressure using high resolution electron energy loss spectroscopy

Abstract

All Science Journal Classification (ASJC) codes

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