In situ infrared study of photoreaction of ethanol on Au and Ag/TiO2 A. Rismanchian, Y. Chen, S. S. C. Chuang
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ArticleSubject(s): этанол | фотокаталитические реакции | инфракрасная спектроскопияGenre/Form: статьи в журналах Online resources: Click here to access online
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Catalysis today Vol. 264. P. 16-22Abstract: 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 Csingle bondH 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 Csingle bondH intensity upon accumulation of photogenerated electrons.
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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 Csingle bondH 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 Csingle bondH intensity upon accumulation of photogenerated electrons.
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