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

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Title:	In situ infrared study of photoreaction of ethanol on Au and Ag/TiO2
Authors:	陳郁文;Rismanchian, Azadeh;Chen, Yu-Wen;Chuang, Steven S.C.
Contributors:	工學院化學工程與材料工程學系
Keywords:	Ag/TiO2;Au/TiO2;In situ IR;Photo-oxidation;Surface hydroxyl;Water/ethanol coverage
Date:	2016-04-15
Issue Date:	2026-04-21 14:50:56 (UTC+8)
Publisher:	Elsevier;Elsevier B.V
Abstract:	摘要： •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 300K. 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. 出版者： Elsevier B.V 出版日期： 2016-04-15 出處： Catalysis today, 2016-04, Vol.264, p.16-22 版權： 2015 Elsevier B.V. 識別號： ISSN: 0920-5861 識別號： EISSN: 1873-4308 識別號： DOI: 10.1016/j.cattod.2015.07.038
Appears in Collections:	[Department of Chemical and Materials Engineering] journal & Dissertation

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