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

Paper ID Volume ID Publish Year Pages File Format Full-Text
53291 46962 2016 7 PDF Available
Title
In situ infrared study of photoreaction of ethanol on Au and Ag/TiO2
Abstract

•Au and Ag increased surface hydroxyl groups and the adsorption of monodentate ethoxy.•Au and Ag enhanced electron–hole transfer rate and promoted the product formation.•Au and Ag accelerated the formation of formate and acetate on TiO2.

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 CH 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 CH intensity upon accumulation of photogenerated electrons.

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Keywords
In situ IR; Au/TiO2; Ag/TiO2; Surface hydroxyl; Water/ethanol coverage; Photo-oxidation
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In situ infrared study of photoreaction of ethanol on Au and Ag/TiO2
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 264, 15 April 2016, Pages 16–22
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
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Any Questions? feel free to contact us