Adsorption Features of Formaldehyde on TiO2(110) Surface Probed by High-Resolution Scanning Tunnelling Microscopy

Wang, Haochen1,4; Zhao, Xiangyun1,4; Huang, Chuanqi2; Jin, Xianchi1,6; Wei, Dong1; Dai, Dongxu1; Ma, Zhibo1; Li, Wei-Xue3; Yang, Xueming1,5

2019-06-20

10.1021/acs.jpclett.9b00522

Journal of Physical Chemistry Letters   影响因子和分区

1948-7185

We report a real-space imaging of formaldehyde (HCHO) adsorption on a TiO2(110) surface probed by high-resolution scanning tunnelling microscopy (STM). Density functional theory calculations (DFT) were carried out to assign the observed features. The adsorptions occur exclusively on 5-fold coordinated Ti (Ti-5c) sites and oxygen vacancies (OVs). The well-resolved configurations on the Ti(5c)x sites feature the overlapping of the two "dumbbell" structures which are originated from the empty orbitals of HCHO. The STM images for the physical adsorption of HCHO on the OV sites appear fuzzy because of the rapid switching of HCHO among the three stable orientations, while those for the chemical adsorption are much clearer, revealing a distinctive difference between chemical and physical adsorptions. This work presents a systematic characterization of the topological features of HCHO/TiO2(110) and provides useful information for mechanical understanding of the reaction mechanism of HCHO on the surfaces.

SCI ; EI

英语

NI期刊

通讯

National Key Research and Development Program of the MOST of China[2016YFA0200603] ; National Key Research and Development Program of the MOST of China[2017YFB0602205] ; National Key Research and Development Program of the MOST of China[2018YFA0208603]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Atomic, Molecular & Chemical

WOS:000472804700025

AMER CHEMICAL SOC

20192407041525

Adsorption ; Density functional theory ; Formaldehyde ; Scanning ; Titanium dioxide

Chemical Operations:802.3 ; Organic Compounds:804.1 ; Inorganic Compounds:804.2 ; Probability Theory:922.1

Web of Science

1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Liaoning, Peoples R China
2.Zhejiang Normal Univ, Hangzhou Inst Adv Studies, Hangzhou 311231, Zhejiang, Peoples R China
3.Univ Sci & Technol China, Dept Chem Phys, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China
6.Scienta Omicron GmbH, Limburger Str 75, D-65232 Taunusstein, Germany

Wang, Haochen,Zhao, Xiangyun,Huang, Chuanqi,et al. Adsorption Features of Formaldehyde on TiO2(110) Surface Probed by High-Resolution Scanning Tunnelling Microscopy[J]. Journal of Physical Chemistry Letters,2019,10(12):3352-3358.

Wang, Haochen.,Zhao, Xiangyun.,Huang, Chuanqi.,Jin, Xianchi.,Wei, Dong.,...&Yang, Xueming.(2019).Adsorption Features of Formaldehyde on TiO2(110) Surface Probed by High-Resolution Scanning Tunnelling Microscopy.Journal of Physical Chemistry Letters,10(12),3352-3358.

Wang, Haochen,et al."Adsorption Features of Formaldehyde on TiO2(110) Surface Probed by High-Resolution Scanning Tunnelling Microscopy".Journal of Physical Chemistry Letters 10.12(2019):3352-3358.