Structure sensitivity in methanol decomposition on ZnO single-crystal surfaces

W. H. Cheng, S. Akhter, Harold H Kung

Research output: Contribution to journalArticle

100 Citations (Scopus)

Abstract

Decomposition of methanol-d4 was studied using temperature-programmed decomposition spectroscopy on the nonpolar flat (101̄0), stepped (505̄1) and (404̄1), and the polar (0001) ZnO surfaces. The (505̄1) and (404̄1) planes are surfaces with (0001) steps and (101̄0) terraces. CD4, CO, CO2, and D2 were the decomposition products on the nonpolar stepped and flat surfaces. The ratios of these products were similar on these surfaces. The fraction of desorbed product being decomposition products increased in the order stoichiometric (101̄0) <reduced (101̄0) <(505̄1) <(404̄1). The activity of the stepped surfaces decreased slightly after oxygen pretreatment of the surface. The results indicated that steps and anion vacancy defects are the active sites for methanol decomposition. The activity of the polar (0001) surface was similar to that of the stepped surfaces. However, the products were different. CD2O and D2O, but no CD4 were observed in addition to CO, CO2 and D2. The results indicated that methanol decomposition on ZnO is a structure-sensitive reaction. Implication of these observations on the reverse reaction of methanol synthesis on ZnO and CuZn oxide is discussed.

Original languageEnglish
Pages (from-to)341-350
Number of pages10
JournalJournal of Catalysis
Volume82
Issue number2
DOIs
Publication statusPublished - 1983

Fingerprint

Single crystal surfaces
crystal surfaces
Methanol
methyl alcohol
Decomposition
decomposition
sensitivity
single crystals
products
Carbon Monoxide
pretreatment
Oxides
Vacancies
Anions
flat surfaces
Negative ions
Spectroscopy
Oxygen
anions
Defects

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

Structure sensitivity in methanol decomposition on ZnO single-crystal surfaces. / Cheng, W. H.; Akhter, S.; Kung, Harold H.

In: Journal of Catalysis, Vol. 82, No. 2, 1983, p. 341-350.

Research output: Contribution to journalArticle

@article{9036218637d0443a95ce5bd67aac29e6,
title = "Structure sensitivity in methanol decomposition on ZnO single-crystal surfaces",
abstract = "Decomposition of methanol-d4 was studied using temperature-programmed decomposition spectroscopy on the nonpolar flat (101̄0), stepped (505̄1) and (404̄1), and the polar (0001) ZnO surfaces. The (505̄1) and (404̄1) planes are surfaces with (0001) steps and (101̄0) terraces. CD4, CO, CO2, and D2 were the decomposition products on the nonpolar stepped and flat surfaces. The ratios of these products were similar on these surfaces. The fraction of desorbed product being decomposition products increased in the order stoichiometric (101̄0) 2O and D2O, but no CD4 were observed in addition to CO, CO2 and D2. The results indicated that methanol decomposition on ZnO is a structure-sensitive reaction. Implication of these observations on the reverse reaction of methanol synthesis on ZnO and CuZn oxide is discussed.",
author = "Cheng, {W. H.} and S. Akhter and Kung, {Harold H}",
year = "1983",
doi = "10.1016/0021-9517(83)90200-2",
language = "English",
volume = "82",
pages = "341--350",
journal = "Journal of Catalysis",
issn = "0021-9517",
publisher = "Academic Press Inc.",
number = "2",

}

TY - JOUR

T1 - Structure sensitivity in methanol decomposition on ZnO single-crystal surfaces

AU - Cheng, W. H.

AU - Akhter, S.

AU - Kung, Harold H

PY - 1983

Y1 - 1983

N2 - Decomposition of methanol-d4 was studied using temperature-programmed decomposition spectroscopy on the nonpolar flat (101̄0), stepped (505̄1) and (404̄1), and the polar (0001) ZnO surfaces. The (505̄1) and (404̄1) planes are surfaces with (0001) steps and (101̄0) terraces. CD4, CO, CO2, and D2 were the decomposition products on the nonpolar stepped and flat surfaces. The ratios of these products were similar on these surfaces. The fraction of desorbed product being decomposition products increased in the order stoichiometric (101̄0) 2O and D2O, but no CD4 were observed in addition to CO, CO2 and D2. The results indicated that methanol decomposition on ZnO is a structure-sensitive reaction. Implication of these observations on the reverse reaction of methanol synthesis on ZnO and CuZn oxide is discussed.

AB - Decomposition of methanol-d4 was studied using temperature-programmed decomposition spectroscopy on the nonpolar flat (101̄0), stepped (505̄1) and (404̄1), and the polar (0001) ZnO surfaces. The (505̄1) and (404̄1) planes are surfaces with (0001) steps and (101̄0) terraces. CD4, CO, CO2, and D2 were the decomposition products on the nonpolar stepped and flat surfaces. The ratios of these products were similar on these surfaces. The fraction of desorbed product being decomposition products increased in the order stoichiometric (101̄0) 2O and D2O, but no CD4 were observed in addition to CO, CO2 and D2. The results indicated that methanol decomposition on ZnO is a structure-sensitive reaction. Implication of these observations on the reverse reaction of methanol synthesis on ZnO and CuZn oxide is discussed.

UR - http://www.scopus.com/inward/record.url?scp=0001384695&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0001384695&partnerID=8YFLogxK

U2 - 10.1016/0021-9517(83)90200-2

DO - 10.1016/0021-9517(83)90200-2

M3 - Article

VL - 82

SP - 341

EP - 350

JO - Journal of Catalysis

JF - Journal of Catalysis

SN - 0021-9517

IS - 2

ER -