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

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

doi:10.1016/j.cattod.2015.07.038

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

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

化學工程與材料工程學系

研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

36 引文斯高帕斯（Scopus）

摘要

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.

原文	???core.languages.en_GB???
頁（從 - 到）	16-22
頁數	7
期刊	Catalysis Today
卷	264
DOIs	https://doi.org/10.1016/j.cattod.2015.07.038
出版狀態	已出版 - 15 4月 2016

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10.1016/j.cattod.2015.07.038

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title = "In situ infrared study of photoreaction of ethanol on Au and Ag/TiO2",

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.",

keywords = "Ag/TiO, Au/TiO, In situ IR, Photo-oxidation, Surface hydroxyl, Water/ethanol coverage",

author = "Azadeh Rismanchian and Chen, {Yu Wen} and Chuang, {Steven S.C.}",

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AU - Rismanchian, Azadeh

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AU - Chuang, Steven S.C.

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Y1 - 2016/4/15

N2 - 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.

AB - 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.

KW - Ag/TiO

KW - Au/TiO

KW - In situ IR

KW - Photo-oxidation

KW - Surface hydroxyl

KW - Water/ethanol coverage

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DO - 10.1016/j.cattod.2015.07.038

M3 - 期刊論文

AN - SCOPUS:84960492897

SN - 0920-5861

VL - 264

SP - 16

EP - 22

JO - Catalysis Today

JF - Catalysis Today

ER -

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

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