In situ infrared study of photoreaction of ethanol on Au and Ag/TiO2

Azadeh Rismanchian, Yu Wen Chen, Steven S.C. Chuang

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

An in situ IR technique was used to study the role of Au and Ag additives on photocatalytic reaction of ethanol on TiO2 at 300 K. Au and Ag additives increased water/ethanol coverage and decreased the rate of ethanol's C-H scission, a step involving in scavenging photogenerated holes. Au and Ag promoted adsorption of ethanol as monodentate ethoxy, accelerated its conversion to formate (HCOO-ad) and acetate (CH3COO-ad). In contrast, adsorbed ethanol on TiO2 did not produce IR-observable products and exhibited a Stark effect with a decreased C-H intensity upon accumulation of photogenerated electrons.

Original languageEnglish
Pages (from-to)16-22
Number of pages7
JournalCatalysis Today
Volume264
DOIs
StatePublished - 15 Apr 2016

Keywords

  • Ag/TiO
  • Au/TiO
  • In situ IR
  • Photo-oxidation
  • Surface hydroxyl
  • Water/ethanol coverage

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