The thermal chemistry of adsorbed ethyl on the Pt(111) surface: infrared evidence for an ethylidene intermediate in the ethyl to ethylidyne conversion

Helen E Newell; Martin McCoustra; Michael A Chesters; Carlos De La Cruz

doi:10.1039/a806786d

The thermal chemistry of adsorbed ethyl on the Pt(111) surface: infrared evidence for an ethylidene intermediate in the ethyl to ethylidyne conversion

Helen E Newell, Martin McCoustra, Michael A Chesters, Carlos De La Cruz

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

25 Citations (Scopus)

Abstract

The reflection absorption infrared (RAIR) spectrum of the adsorbed ethyl (C2H5) moiety produced by the dissociative adsorption of ethane from a supersonic molecular beam onto Pt(111) at 150 K is reported. The thermal chemistry of the C2H5 fragment so produced was then followed using a combination of RAIR spectroscopy and temperature programmed desorption (TPD). The RAIR spectra indicate the presence of ethylidene (CHCH3) and ethylidyne (CCH3) at 250 and 350 K respectively. This implies the stepwise loss of one and two hydrogen atoms from the ethyl moiety during the heating process. Temperature programmed desorption (TPD) measurements show that hydrogen desorption is not accompanied by desorption of either saturated or unsaturated C-2 hydrocarbons or methane into the gas phase.

Original language	English
Pages (from-to)	3695-3698
Number of pages	4
Journal	Journal of the Chemical Society, Faraday Transactions
Volume	94
Issue number	24
DOIs	https://doi.org/10.1039/a806786d
Publication status	Published - 1998

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@article{811d01e4b16b498a98d3cfbfc476c3d2,

title = "The thermal chemistry of adsorbed ethyl on the Pt(111) surface: infrared evidence for an ethylidene intermediate in the ethyl to ethylidyne conversion",

abstract = "The reflection absorption infrared (RAIR) spectrum of the adsorbed ethyl (C2H5) moiety produced by the dissociative adsorption of ethane from a supersonic molecular beam onto Pt(111) at 150 K is reported. The thermal chemistry of the C2H5 fragment so produced was then followed using a combination of RAIR spectroscopy and temperature programmed desorption (TPD). The RAIR spectra indicate the presence of ethylidene (CHCH3) and ethylidyne (CCH3) at 250 and 350 K respectively. This implies the stepwise loss of one and two hydrogen atoms from the ethyl moiety during the heating process. Temperature programmed desorption (TPD) measurements show that hydrogen desorption is not accompanied by desorption of either saturated or unsaturated C-2 hydrocarbons or methane into the gas phase. ",

author = "Newell, {Helen E} and Martin McCoustra and Chesters, {Michael A} and {De La Cruz}, Carlos",

year = "1998",

doi = "10.1039/a806786d",

language = "English",

volume = "94",

pages = "3695--3698",

journal = "Journal of the Chemical Society, Faraday Transactions",

issn = "0956-5000",

publisher = "Royal Society of Chemistry",

number = "24",

}

The thermal chemistry of adsorbed ethyl on the Pt(111) surface: infrared evidence for an ethylidene intermediate in the ethyl to ethylidyne conversion. / Newell, Helen E; McCoustra, Martin; Chesters, Michael A et al.
In: Journal of the Chemical Society, Faraday Transactions, Vol. 94, No. 24, 1998, p. 3695-3698.

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

TY - JOUR

T1 - The thermal chemistry of adsorbed ethyl on the Pt(111) surface

T2 - infrared evidence for an ethylidene intermediate in the ethyl to ethylidyne conversion

AU - Newell, Helen E

AU - McCoustra, Martin

AU - Chesters, Michael A

AU - De La Cruz, Carlos

PY - 1998

Y1 - 1998

N2 - The reflection absorption infrared (RAIR) spectrum of the adsorbed ethyl (C2H5) moiety produced by the dissociative adsorption of ethane from a supersonic molecular beam onto Pt(111) at 150 K is reported. The thermal chemistry of the C2H5 fragment so produced was then followed using a combination of RAIR spectroscopy and temperature programmed desorption (TPD). The RAIR spectra indicate the presence of ethylidene (CHCH3) and ethylidyne (CCH3) at 250 and 350 K respectively. This implies the stepwise loss of one and two hydrogen atoms from the ethyl moiety during the heating process. Temperature programmed desorption (TPD) measurements show that hydrogen desorption is not accompanied by desorption of either saturated or unsaturated C-2 hydrocarbons or methane into the gas phase.

AB - The reflection absorption infrared (RAIR) spectrum of the adsorbed ethyl (C2H5) moiety produced by the dissociative adsorption of ethane from a supersonic molecular beam onto Pt(111) at 150 K is reported. The thermal chemistry of the C2H5 fragment so produced was then followed using a combination of RAIR spectroscopy and temperature programmed desorption (TPD). The RAIR spectra indicate the presence of ethylidene (CHCH3) and ethylidyne (CCH3) at 250 and 350 K respectively. This implies the stepwise loss of one and two hydrogen atoms from the ethyl moiety during the heating process. Temperature programmed desorption (TPD) measurements show that hydrogen desorption is not accompanied by desorption of either saturated or unsaturated C-2 hydrocarbons or methane into the gas phase.

U2 - 10.1039/a806786d

DO - 10.1039/a806786d

M3 - Article

SN - 0956-5000

VL - 94

SP - 3695

EP - 3698

JO - Journal of the Chemical Society, Faraday Transactions

JF - Journal of the Chemical Society, Faraday Transactions

IS - 24

ER -

The thermal chemistry of adsorbed ethyl on the Pt(111) surface: infrared evidence for an ethylidene intermediate in the ethyl to ethylidyne conversion

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