Photoinduced Decomposition of Formaldehyde on Rutile TiO2(100)-(1x1)

doi:10.1063/1674-0068/31/cjcp1806137

	Photoinduced Decomposition of Formaldehyde on Rutile TiO2(100)-(1x1)
	Dai, Dong-xu 3; Yang, Xue-ming 3; Chen, Xiao 1,3; Li, Fang-Liang 1,2; Guo, Qing 3
刊名	CHINESE JOURNAL OF CHEMICAL PHYSICS
	2018-08-01
卷号	31 期号:4 页码:547-554
关键词	Rutile TiO2(100)-(1x1) Formaldehyde Temperature-programmed desorption Photoinduced decomposition
ISSN号	1674-0068
DOI	10.1063/1674-0068/31/cjcp1806137
通讯作者	Guo, Qing(guoqing@dicp.ac.cn) ; Yang, Xue-ming(xmyang@dicp.ac.cn)
英文摘要	We have investigated the photoinduced decomposition of formaldehyde (CH2O) on a rutile TiO2(100)-(1x1) surface at 355 nm using temperature-programmed desorption. Products, formate (HCOO-), methyl radical (CH3 center dot), ethylene (C2H4), and methanol (CH3OH) have been detected. The initial step in the decomposition of CH2O on the rutile TiO2(100)-(1x1) surface is the formation of a dioxymethylene intermediate in which the carbonyl O atom of CH 2 O is bound to a Ti atom at the five-fold-coordinated Ti4+ (Ti-5c) site and its carbonyl C atom bound to a nearby bridge-bonded oxygen (O-b) atom, respectively. During 355 nm irradiation, the dioxymethylene intermediate can transfer an H atom to the O-b atom, thus forming HCOO directly, which is considered as the main reaction channel. In addition, the dioxymethylene intermediate can also transfer methylene to the O-b row and break the C-O bond, thus leaving the original carbonyl O atom at the Ti-5c site. After the transfer of methylene, several pathways to products are available. Thus, we have found that O-b atoms are intimately involved in the photoinduced decomposition of CH2O on the rutile TiO2(100)-(1x1) surface.
资助项目	National Natural Science Foundation of China[21673235] ; National Natural Science Foundation of China[21403224] ; Youth Innovation Promotion Association CAS ; Key Research Program of the Chinese Academy of Sciences
WOS关键词	TIO2(110) SURFACE ; TIO2 PHOTOCATALYSIS ; METHANOL SYNTHESIS ; THERMAL-CATALYSIS ; OXIDE SURFACES ; CHEMISTRY ; WATER ; ADSORPTION ; OXIDATION ; IDENTIFICATION
WOS研究方向	Physics
语种	英语
出版者	CHINESE PHYSICAL SOC
WOS记录号	WOS:000445660500023
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/166958]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Yang, Xue-ming; Guo, Qing
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Dai, Dong-xu,Yang, Xue-ming,Chen, Xiao,et al. Photoinduced Decomposition of Formaldehyde on Rutile TiO2(100)-(1x1)[J]. CHINESE JOURNAL OF CHEMICAL PHYSICS,2018,31(4):547-554.
APA	Dai, Dong-xu,Yang, Xue-ming,Chen, Xiao,Li, Fang-Liang,&Guo, Qing.(2018).Photoinduced Decomposition of Formaldehyde on Rutile TiO2(100)-(1x1).CHINESE JOURNAL OF CHEMICAL PHYSICS,31(4),547-554.
MLA	Dai, Dong-xu,et al."Photoinduced Decomposition of Formaldehyde on Rutile TiO2(100)-(1x1)".CHINESE JOURNAL OF CHEMICAL PHYSICS 31.4(2018):547-554.