Spectroscopic studies of methanol decomposition on Pd[lcub]111[rcub]

J. J. Chen, Z. C. Jiang, Y. Zhou, B. R. Chakraborty, Nicholas Winograd

Research output: Contribution to journalArticle

97 Citations (Scopus)

Abstract

The thermal decomposition of methanol on a clean Pd[lcub]111[rcub] surface has been investigated using X-ray photoelectron spectrometry (XPS), secondary ion mass spectrometry (SIMS) and thermal desorption spectrometry (TDS). In this work, we observe that the methanolic C-O bond activation on Pd[lcub]111[rcub] is a strongly coverage dependent process. At lower and higher coverages, XPS data suggest that CH3Oads is the principle product. At near monolayer coverage the methanolic C-O bond dissociates at 175 K to produce CH3,ads, which is characterized by a C 1s binding energy of 283.8 eV, and is stable up to 400 K. A stepwise dehydrogenation of CH3,ads to form CH2,ads (methylene) and CHads (methylidyne) is observed above 400 K. Surface methyl and its dehydrogenated forms are characterized both by the chemical shift of the XPS C 1s peak from 283.8 to 284.8 eV and by positive ion SIMS peaks with m e = 15, 14 and 13. The gaseous products detected by TDS are methanol, CO, hydrogen, methane and water. This observation implies that the methanolic C-O bond cleavage is contingent upon a special molecular arrangement of precursors before reaction and that the CH3,ads product is stabilized by ancillary reaction products, such as CO.

Original languageEnglish (US)
Pages (from-to)248-262
Number of pages15
JournalSurface Science
Volume328
Issue number3
DOIs
StatePublished - May 1 1995

Fingerprint

Spectrometry
Methanol
methyl alcohol
Photoelectrons
Decomposition
decomposition
Thermal desorption
Carbon Monoxide
Secondary ion mass spectrometry
photoelectrons
X rays
spectroscopy
secondary ion mass spectrometry
products
desorption
Methane
Chemical shift
Dehydrogenation
Binding energy
Reaction products

All Science Journal Classification (ASJC) codes

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

Cite this

Chen, J. J. ; Jiang, Z. C. ; Zhou, Y. ; Chakraborty, B. R. ; Winograd, Nicholas. / Spectroscopic studies of methanol decomposition on Pd[lcub]111[rcub]. In: Surface Science. 1995 ; Vol. 328, No. 3. pp. 248-262.
@article{07a769d993a9429cb239c681d45160bf,
title = "Spectroscopic studies of methanol decomposition on Pd[lcub]111[rcub]",
abstract = "The thermal decomposition of methanol on a clean Pd[lcub]111[rcub] surface has been investigated using X-ray photoelectron spectrometry (XPS), secondary ion mass spectrometry (SIMS) and thermal desorption spectrometry (TDS). In this work, we observe that the methanolic C-O bond activation on Pd[lcub]111[rcub] is a strongly coverage dependent process. At lower and higher coverages, XPS data suggest that CH3Oads is the principle product. At near monolayer coverage the methanolic C-O bond dissociates at 175 K to produce CH3,ads, which is characterized by a C 1s binding energy of 283.8 eV, and is stable up to 400 K. A stepwise dehydrogenation of CH3,ads to form CH2,ads (methylene) and CHads (methylidyne) is observed above 400 K. Surface methyl and its dehydrogenated forms are characterized both by the chemical shift of the XPS C 1s peak from 283.8 to 284.8 eV and by positive ion SIMS peaks with m e = 15, 14 and 13. The gaseous products detected by TDS are methanol, CO, hydrogen, methane and water. This observation implies that the methanolic C-O bond cleavage is contingent upon a special molecular arrangement of precursors before reaction and that the CH3,ads product is stabilized by ancillary reaction products, such as CO.",
author = "Chen, {J. J.} and Jiang, {Z. C.} and Y. Zhou and Chakraborty, {B. R.} and Nicholas Winograd",
year = "1995",
month = "5",
day = "1",
doi = "10.1016/0039-6028(95)00007-0",
language = "English (US)",
volume = "328",
pages = "248--262",
journal = "Surface Science",
issn = "0039-6028",
publisher = "Elsevier",
number = "3",

}

Spectroscopic studies of methanol decomposition on Pd[lcub]111[rcub]. / Chen, J. J.; Jiang, Z. C.; Zhou, Y.; Chakraborty, B. R.; Winograd, Nicholas.

In: Surface Science, Vol. 328, No. 3, 01.05.1995, p. 248-262.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Spectroscopic studies of methanol decomposition on Pd[lcub]111[rcub]

AU - Chen, J. J.

AU - Jiang, Z. C.

AU - Zhou, Y.

AU - Chakraborty, B. R.

AU - Winograd, Nicholas

PY - 1995/5/1

Y1 - 1995/5/1

N2 - The thermal decomposition of methanol on a clean Pd[lcub]111[rcub] surface has been investigated using X-ray photoelectron spectrometry (XPS), secondary ion mass spectrometry (SIMS) and thermal desorption spectrometry (TDS). In this work, we observe that the methanolic C-O bond activation on Pd[lcub]111[rcub] is a strongly coverage dependent process. At lower and higher coverages, XPS data suggest that CH3Oads is the principle product. At near monolayer coverage the methanolic C-O bond dissociates at 175 K to produce CH3,ads, which is characterized by a C 1s binding energy of 283.8 eV, and is stable up to 400 K. A stepwise dehydrogenation of CH3,ads to form CH2,ads (methylene) and CHads (methylidyne) is observed above 400 K. Surface methyl and its dehydrogenated forms are characterized both by the chemical shift of the XPS C 1s peak from 283.8 to 284.8 eV and by positive ion SIMS peaks with m e = 15, 14 and 13. The gaseous products detected by TDS are methanol, CO, hydrogen, methane and water. This observation implies that the methanolic C-O bond cleavage is contingent upon a special molecular arrangement of precursors before reaction and that the CH3,ads product is stabilized by ancillary reaction products, such as CO.

AB - The thermal decomposition of methanol on a clean Pd[lcub]111[rcub] surface has been investigated using X-ray photoelectron spectrometry (XPS), secondary ion mass spectrometry (SIMS) and thermal desorption spectrometry (TDS). In this work, we observe that the methanolic C-O bond activation on Pd[lcub]111[rcub] is a strongly coverage dependent process. At lower and higher coverages, XPS data suggest that CH3Oads is the principle product. At near monolayer coverage the methanolic C-O bond dissociates at 175 K to produce CH3,ads, which is characterized by a C 1s binding energy of 283.8 eV, and is stable up to 400 K. A stepwise dehydrogenation of CH3,ads to form CH2,ads (methylene) and CHads (methylidyne) is observed above 400 K. Surface methyl and its dehydrogenated forms are characterized both by the chemical shift of the XPS C 1s peak from 283.8 to 284.8 eV and by positive ion SIMS peaks with m e = 15, 14 and 13. The gaseous products detected by TDS are methanol, CO, hydrogen, methane and water. This observation implies that the methanolic C-O bond cleavage is contingent upon a special molecular arrangement of precursors before reaction and that the CH3,ads product is stabilized by ancillary reaction products, such as CO.

UR - http://www.scopus.com/inward/record.url?scp=0029307669&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029307669&partnerID=8YFLogxK

U2 - 10.1016/0039-6028(95)00007-0

DO - 10.1016/0039-6028(95)00007-0

M3 - Article

AN - SCOPUS:0029307669

VL - 328

SP - 248

EP - 262

JO - Surface Science

JF - Surface Science

SN - 0039-6028

IS - 3

ER -