Reactivity of ethyl groups on a Sn/Pt(111) surface alloy

Haibo Zhao; Bruce E. Koel

doi:10.1007/s10562-004-0772-6

Reactivity of ethyl groups on a Sn/Pt(111) surface alloy

Haibo Zhao, Bruce E. Koel

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

10 Scopus citations

Abstract

In order to probe the thermal stability and reactivity of ethyl intermediates on Pt-Sn alloy catalysts, we have synthesized these species by reaction of H atoms with adsorbed ethylene on a (√3 × √3)R30°-Sn/Pt(111) surface alloy. Adsorbed ethyl groups are stable until 376 K where they react to evolve ethane, ethylene, and H₂. The activation energy for ethyl dehydrogenation is E_dehyd** = 97 kJ/mol, which is twice that reported on Pt(111). In addition, we place a lower limit of E_hydr* > 70 kJ/mol on the barrier to ethyl hydrogenation on this alloy.

Original language	English (US)
Pages (from-to)	27-32
Number of pages	6
Journal	Catalysis Letters
Volume	99
Issue number	1-2
DOIs	https://doi.org/10.1007/s10562-004-0772-6
State	Published - Jan 2005
Externally published	Yes

All Science Journal Classification (ASJC) codes

Catalysis
General Chemistry

Keywords

Dehydrogenation
Ethane
Ethyl
Ethylene
H-atom
Hydrogen
Sn/Pt alloy
TPD

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10.1007/s10562-004-0772-6

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title = "Reactivity of ethyl groups on a Sn/Pt(111) surface alloy",

abstract = "In order to probe the thermal stability and reactivity of ethyl intermediates on Pt-Sn alloy catalysts, we have synthesized these species by reaction of H atoms with adsorbed ethylene on a (√3 × √3)R30°-Sn/Pt(111) surface alloy. Adsorbed ethyl groups are stable until 376 K where they react to evolve ethane, ethylene, and H2. The activation energy for ethyl dehydrogenation is Edehyd** = 97 kJ/mol, which is twice that reported on Pt(111). In addition, we place a lower limit of Ehydr* > 70 kJ/mol on the barrier to ethyl hydrogenation on this alloy.",

keywords = "Dehydrogenation, Ethane, Ethyl, Ethylene, H-atom, Hydrogen, Sn/Pt alloy, TPD",

author = "Haibo Zhao and Koel, \{Bruce E.\}",

note = "Funding Information: This work was supported by the Department of Energy, Office of Basic Energy Sciences, Chemical Sciences Division.",

year = "2005",

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doi = "10.1007/s10562-004-0772-6",

language = "English (US)",

volume = "99",

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journal = "Catalysis Letters",

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TY - JOUR

T1 - Reactivity of ethyl groups on a Sn/Pt(111) surface alloy

AU - Zhao, Haibo

AU - Koel, Bruce E.

N1 - Funding Information: This work was supported by the Department of Energy, Office of Basic Energy Sciences, Chemical Sciences Division.

PY - 2005/1

Y1 - 2005/1

N2 - In order to probe the thermal stability and reactivity of ethyl intermediates on Pt-Sn alloy catalysts, we have synthesized these species by reaction of H atoms with adsorbed ethylene on a (√3 × √3)R30°-Sn/Pt(111) surface alloy. Adsorbed ethyl groups are stable until 376 K where they react to evolve ethane, ethylene, and H2. The activation energy for ethyl dehydrogenation is Edehyd** = 97 kJ/mol, which is twice that reported on Pt(111). In addition, we place a lower limit of Ehydr* > 70 kJ/mol on the barrier to ethyl hydrogenation on this alloy.

AB - In order to probe the thermal stability and reactivity of ethyl intermediates on Pt-Sn alloy catalysts, we have synthesized these species by reaction of H atoms with adsorbed ethylene on a (√3 × √3)R30°-Sn/Pt(111) surface alloy. Adsorbed ethyl groups are stable until 376 K where they react to evolve ethane, ethylene, and H2. The activation energy for ethyl dehydrogenation is Edehyd** = 97 kJ/mol, which is twice that reported on Pt(111). In addition, we place a lower limit of Ehydr* > 70 kJ/mol on the barrier to ethyl hydrogenation on this alloy.

KW - Dehydrogenation

KW - Ethane

KW - Ethyl

KW - Ethylene

KW - H-atom

KW - Hydrogen

KW - Sn/Pt alloy

KW - TPD

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U2 - 10.1007/s10562-004-0772-6

DO - 10.1007/s10562-004-0772-6

M3 - Article

AN - SCOPUS:11244294565

SN - 1011-372X

VL - 99

SP - 27

EP - 32

JO - Catalysis Letters

JF - Catalysis Letters

IS - 1-2

ER -

Reactivity of ethyl groups on a Sn/Pt(111) surface alloy

Abstract

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