Methanol Adsorption and Reaction on TiO2(110) at Near Ambient Pressure

Ren, Zefeng1; Zhang, Ruidan2,3,4; Luo, Ting1,5; Zeng, Wei-Wang1; Zhou, Chuanyao1; Yang, Xueming1,5

2023-01-19

10.1021/acs.jpcc.2c08126

Journal of Physical Chemistry C   影响因子和分区

1932-7447

1932-7455

Although methanol on rutile TiO2(110) has been widely investigated under ultrahigh vacuum (UHV) conditions as a prototypical model, the adsorption structure and reaction of this system under or near real reaction conditions are still unclear. Surfacesensitive sum frequency generation vibrational spectroscopy (SFG-VS) has been utilized to in situ study the adsorption and reaction of methanol on TiO2(110) at near ambient pressure and 400 K. The SFG results indicate that the bridge-bonded methoxy (CH3Ob) is the dominant adsorbed species on TiO2(110) at an elevated pressure of methanol, and its density rises with increasing the methanol pressure. By evacuating the methanol gas, only CH3Ob species leave behind on the TiO2(110) surface, which is also confirmed by ultraviolet (UV) irradiation experiments. Furthermore, by a comparative SFG study of methanol adsorption on TiO2(110) as a function of methanol pressure at 250 K, we concluded that the recombinative desorption of bridging hydroxyl (OHb) groups in the form of water can facilitate the continuous dissociative adsorption of methanol on bridging oxygen vacancy (O-v) sites and the continuous generation of CH3Ob. Our results not only shed light on the adsorption and reaction of methanol on TiO2(110) at near ambient pressure but also demonstrate the studies of catalytic reaction under or near real reaction conditions at the molecular level.

SCI ; EI

英语

其他

Ministry of Science and Technology[2018YFA0208700] ; National Natural Science Foundation of China["22103013","91645125"] ; Natural Science Foundation of Fujian Province[2021J01184] ; Education Department of Fujian Province[JAT200086]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000920389700001

AMER CHEMICAL SOC

20230213373218

Adsorption ; Catalysis ; Oxide minerals ; Titanium dioxide

Minerals:482.2 ; Chemical Reactions:802.2 ; Chemical Operations:802.3 ; Organic Compounds:804.1 ; Inorganic Compounds:804.2

Web of Science

1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
2.Fujian Normal Univ, Coll Phys & Energy, Fujian Prov Collaborat Innovat Ctr Adv High, Field Superconducting Mat & Engn, Fuzhou 350117, Peoples R China
3.Fujian Normal Univ, Coll Phys & Energy, Fujian Prov Engn Technol Res Ctr Solar Energy Conv, Fuzhou 350117, Peoples R China
4.Dalian Inst Chem Phys, Chinese Acad Sci, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
5.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Guangdong, Peoples R China

Ren, Zefeng,Zhang, Ruidan,Luo, Ting,et al. Methanol Adsorption and Reaction on TiO2(110) at Near Ambient Pressure[J]. Journal of Physical Chemistry C,2023,127(2):1049-1056.

Ren, Zefeng,Zhang, Ruidan,Luo, Ting,Zeng, Wei-Wang,Zhou, Chuanyao,&Yang, Xueming.(2023).Methanol Adsorption and Reaction on TiO2(110) at Near Ambient Pressure.Journal of Physical Chemistry C,127(2),1049-1056.

Ren, Zefeng,et al."Methanol Adsorption and Reaction on TiO2(110) at Near Ambient Pressure".Journal of Physical Chemistry C 127.2(2023):1049-1056.