Hydrogenation and dehydrogenation of propylene on Pt(111) studied by sum frequency generation from UHV to atmospheric pressure

Paul S. Cremer; Xingcai Su; Y. Ron Shen; Gabor A. Somorjai

doi:10.1021/jp9613394

Hydrogenation and dehydrogenation of propylene on Pt(111) studied by sum frequency generation from UHV to atmospheric pressure

Paul S. Cremer
, Xingcai Su
, Y. Ron Shen
, Gabor A. Somorjai

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

122 Scopus citations

Abstract

The reactions of adsorbed propylene on Pt(111) in the presence and absence of hydrogen have been studied over 13 orders of magnitude in pressure using infrared-visible sum frequency generation. In the presence of near ambient pressures of hydrogen and propylene at 295 K, propylene hydrogenation was observed to proceed from a physisorbed intermediate (π-bonded propylene) through a 2-propyl species (Pt-CH(CH₃)₂) to propane. Under UHV conditions in the absence of hydrogen, di-σ-bonded propylene was found to dehydrogenate to propylidyne just below room temperature and then to vinylmethylidyne (M≡CCHCH₂) at 450 K on the way to graphite formation.

Original language	English (US)
Pages (from-to)	16302-16309
Number of pages	8
Journal	Journal of physical chemistry
Volume	100
Issue number	40
DOIs	https://doi.org/10.1021/jp9613394
State	Published - Oct 3 1996

All Science Journal Classification (ASJC) codes

General Engineering
Physical and Theoretical Chemistry

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10.1021/jp9613394

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title = "Hydrogenation and dehydrogenation of propylene on Pt(111) studied by sum frequency generation from UHV to atmospheric pressure",

abstract = "The reactions of adsorbed propylene on Pt(111) in the presence and absence of hydrogen have been studied over 13 orders of magnitude in pressure using infrared-visible sum frequency generation. In the presence of near ambient pressures of hydrogen and propylene at 295 K, propylene hydrogenation was observed to proceed from a physisorbed intermediate (π-bonded propylene) through a 2-propyl species (Pt-CH(CH3)2) to propane. Under UHV conditions in the absence of hydrogen, di-σ-bonded propylene was found to dehydrogenate to propylidyne just below room temperature and then to vinylmethylidyne (M≡CCHCH2) at 450 K on the way to graphite formation.",

author = "Cremer, \{Paul S.\} and Xingcai Su and Shen, \{Y. Ron\} and Somorjai, \{Gabor A.\}",

year = "1996",

month = oct,

day = "3",

doi = "10.1021/jp9613394",

language = "English (US)",

volume = "100",

pages = "16302--16309",

journal = "Journal of physical chemistry",

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T1 - Hydrogenation and dehydrogenation of propylene on Pt(111) studied by sum frequency generation from UHV to atmospheric pressure

AU - Cremer, Paul S.

AU - Su, Xingcai

AU - Shen, Y. Ron

AU - Somorjai, Gabor A.

PY - 1996/10/3

Y1 - 1996/10/3

N2 - The reactions of adsorbed propylene on Pt(111) in the presence and absence of hydrogen have been studied over 13 orders of magnitude in pressure using infrared-visible sum frequency generation. In the presence of near ambient pressures of hydrogen and propylene at 295 K, propylene hydrogenation was observed to proceed from a physisorbed intermediate (π-bonded propylene) through a 2-propyl species (Pt-CH(CH3)2) to propane. Under UHV conditions in the absence of hydrogen, di-σ-bonded propylene was found to dehydrogenate to propylidyne just below room temperature and then to vinylmethylidyne (M≡CCHCH2) at 450 K on the way to graphite formation.

AB - The reactions of adsorbed propylene on Pt(111) in the presence and absence of hydrogen have been studied over 13 orders of magnitude in pressure using infrared-visible sum frequency generation. In the presence of near ambient pressures of hydrogen and propylene at 295 K, propylene hydrogenation was observed to proceed from a physisorbed intermediate (π-bonded propylene) through a 2-propyl species (Pt-CH(CH3)2) to propane. Under UHV conditions in the absence of hydrogen, di-σ-bonded propylene was found to dehydrogenate to propylidyne just below room temperature and then to vinylmethylidyne (M≡CCHCH2) at 450 K on the way to graphite formation.

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U2 - 10.1021/jp9613394

DO - 10.1021/jp9613394

M3 - Article

AN - SCOPUS:0030567899

SN - 0022-3654

VL - 100

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EP - 16309

JO - Journal of physical chemistry

JF - Journal of physical chemistry

IS - 40

ER -

Hydrogenation and dehydrogenation of propylene on Pt(111) studied by sum frequency generation from UHV to atmospheric pressure

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