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学科主题: 物理化学
题名: Photoinduced Decomposition of Formaldehyde on a TiO2(110) Surface, Assisted by Bridge-Bonded Oxygen Atoms
作者: Xu, Chenbiao1;  Yang, Wenshao1;  Guo, Qing1;  Dai, Dongxu1;  Minton, Timothy K.1, 2;  Yang, Xueming1
通讯作者: 郭庆 ;  杨学明
刊名: JOURNAL OF PHYSICAL CHEMISTRY LETTERS
发表日期: 2013-08-15
DOI: 10.1021/jz401349q
卷: 4, 期:16, 页:2668-2673
收录类别: SCI
合作性质: 
文章类型: Article
部门归属: 11
项目归属: 1102
产权排名: 待补充
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary ;  Physics, Atomic, Molecular & Chemical
资助者: 1,1
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science ;  Physics
英文摘要: We have investigated the photoinduced decomposition of formaldehyde (CH2O) on TiO2(110) at 400 nm using temperature-programmed desorption. Formate (HCOO), methyl radicals (CH3), and ethylene (C2H4) have been detected, while no evidence of polymerization of CH2O was found. The initial step in the decomposition of CH2O on TiO2(110) is the formation of a dioxymethylene intermediate in which the carbonyl O atom of CH2O is bound both to a Ti atom on the five-fold-coordinated lattice site (Ti-5C) and to a nearby bridge-bonded oxygen (BBO) atom. During 400 nm irradiation, the dioxymethylene intermediate can transfer methylene to the bridging oxygen row and break the C-O bond, thus leaving the original carbonyl O atom on the Ti-5C site. After this transfer of methylene, several pathways to products are available. Thus we have found that BBO atoms are intimately involved in the photoinduced decomposition of CH2O on TiO2(110).
关键词[WOS]: FORMIC-ACID ;  LATTICE OXYGEN ;  PHOTOCATALYTIC DECOMPOSITION ;  TIO2 PHOTOCATALYSIS ;  ALIPHATIC-ALCOHOLS ;  TITANIUM-DIOXIDE ;  RUTILE TIO2(110) ;  OXIDE SURFACES ;  THIN-FILM ;  ADSORPTION
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000323300900012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/119676
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Liaoning, Peoples R China
2.Montana State Univ, Dept Chem & Biochem, Bozeman, MT 59717 USA

Recommended Citation:
Xu, Chenbiao,Yang, Wenshao,Guo, Qing,et al. Photoinduced Decomposition of Formaldehyde on a TiO2(110) Surface, Assisted by Bridge-Bonded Oxygen Atoms[J]. JOURNAL OF PHYSICAL CHEMISTRY LETTERS,2013,4(16):2668-2673.
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