Selectivity and mechanism shifts in the reactions of acetaldehyde on oxidized and reduced TiO2(001) surfaces

Hicham Idriss, M A Barteau

Research output: Contribution to journalArticle

70 Citations (Scopus)

Abstract

Depending on the oxidation state of the TiO2(001) surface, acetaldehyde can form C-4 products by either aldol condensation or reductive coupling routes. Aldol condensation generates crotonaldehyde and crotyl alcohol, and is favored on oxidized, stoichiometric surfaces. Reductive coupling produces butene, and occurs only on reduced surfaces. The switch-over in selectivity with increasing extents of surface oxidation provides important insights into the active site requirements for each of these reactions.

Original languageEnglish
Pages (from-to)147-153
Number of pages7
JournalCatalysis Letters
Volume40
Issue number3-4
Publication statusPublished - 1996

Keywords

  • acetaldehyde
  • butene
  • crotonaldehyde
  • aldol condensation
  • reductive carbonyl coupling
  • titanium dioxide
  • SINGLE-CRYSTAL SURFACES
  • CARBON BOND FORMATION
  • ALDOL CONDENSATION
  • OXIDE SURFACES
  • FORMALDEHYDE
  • ACID
  • ADSORPTION
  • REDUCTION
  • CATALYSTS

Cite this

Selectivity and mechanism shifts in the reactions of acetaldehyde on oxidized and reduced TiO2(001) surfaces. / Idriss, Hicham; Barteau, M A .

In: Catalysis Letters, Vol. 40, No. 3-4, 1996, p. 147-153.

Research output: Contribution to journalArticle

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abstract = "Depending on the oxidation state of the TiO2(001) surface, acetaldehyde can form C-4 products by either aldol condensation or reductive coupling routes. Aldol condensation generates crotonaldehyde and crotyl alcohol, and is favored on oxidized, stoichiometric surfaces. Reductive coupling produces butene, and occurs only on reduced surfaces. The switch-over in selectivity with increasing extents of surface oxidation provides important insights into the active site requirements for each of these reactions.",
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N2 - Depending on the oxidation state of the TiO2(001) surface, acetaldehyde can form C-4 products by either aldol condensation or reductive coupling routes. Aldol condensation generates crotonaldehyde and crotyl alcohol, and is favored on oxidized, stoichiometric surfaces. Reductive coupling produces butene, and occurs only on reduced surfaces. The switch-over in selectivity with increasing extents of surface oxidation provides important insights into the active site requirements for each of these reactions.

AB - Depending on the oxidation state of the TiO2(001) surface, acetaldehyde can form C-4 products by either aldol condensation or reductive coupling routes. Aldol condensation generates crotonaldehyde and crotyl alcohol, and is favored on oxidized, stoichiometric surfaces. Reductive coupling produces butene, and occurs only on reduced surfaces. The switch-over in selectivity with increasing extents of surface oxidation provides important insights into the active site requirements for each of these reactions.

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