Coverage-Dependent Ethylene Glycol Photochemistry on Rutile-TiO2(110)

Xu, Fei1,2; Chen, Xiao3; Yang, Wenshao4; Wang, Xingan1,2; Yang, Xueming3,5; Guo, Qing3

2020-07-09

10.1021/acs.jpcc.0c03057

Journal of Physical Chemistry C   影响因子和分区

1932-7447

1932-7455

Photocatalysis offers a new approach for polyol conversion to value-added products. However, the lack of a comprehensive mechanistic understanding limits or even misleads the development of highly selective and efficient photocatalysts for this process. The photochemistry of ethylene glycol (EG) on a reduced rutile-TiO2(110) surface has been studied using the temperature-programmed desorption (TPD) method. The thermal chemistry of EG on the surface produces ethylene (C2H4) and acetaldehyde (CH3CHO) at high temperature (>500 K); however, in the photoreaction process, formaldehyde (CH2O) and CH3CHO products are identified at low temperature (<300 K). The C-C bond cleavage channel to produce CH2O on the five-coordinated Ti4+ sites (Ti-sc) and H atoms on the bridging oxygen sites (H-b) dominates at very low EG coverage. The C-O bond cleavage channel to produce CH3CHO and water on the Ti-sc sites dominates at high EG coverage, which may be affected by the HO(b)s and steric hindrance of EG at high EG coverage. The results further demonstrate that photocatalysis may alter the reaction channels of EG decomposition significantly, making it possible for selective photocatalytic polyol conversion in the future.

SCI ; EI

英语

通讯

National Key R&D Program of China[2016YFF0200500][2018YFE0203002] ; National Natural Science Foundation of China[21403207][21673235][21803056] ; Zhejiang Provincial Natural Science Foundation of China[LQ18B030003] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB 17000000]

Chemistry ; Science & Technology - Other Topics ; Materials Science

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

WOS:000550763500024

AMER CHEMICAL SOC

20203309058981

Ethylene ; Photocatalysis ; Titanium dioxide ; Chemical bonds ; Temperature ; Oxide minerals ; Polyols ; Temperature programmed desorption

Minerals:482.2 ; Thermodynamics:641.1 ; Light/Optics:741.1 ; Physical Chemistry:801.4 ; Chemical Reactions:802.2 ; Chemical Operations:802.3 ; Organic Compounds:804.1 ; Inorganic Compounds:804.2

Web of Science

1.Univ Sci & Technol China, Ctr Adv Chem Phys, Hefei 230026, Anhui, Peoples R China
2.Univ Sci & Technol China, Dept Chem Phys, Hefei 230026, Anhui, Peoples R China
3.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Guangdong, Peoples R China
4.Zhejiang Normal Univ, Hangzhou Inst Adv Studies, Hangzhou 311231, Zhejiang, Peoples R China
5.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Liaoning, Peoples R China

Xu, Fei,Chen, Xiao,Yang, Wenshao,et al. Coverage-Dependent Ethylene Glycol Photochemistry on Rutile-TiO2(110)[J]. Journal of Physical Chemistry C,2020,124(27):14632-14639.

Xu, Fei,Chen, Xiao,Yang, Wenshao,Wang, Xingan,Yang, Xueming,&Guo, Qing.(2020).Coverage-Dependent Ethylene Glycol Photochemistry on Rutile-TiO2(110).Journal of Physical Chemistry C,124(27),14632-14639.

Xu, Fei,et al."Coverage-Dependent Ethylene Glycol Photochemistry on Rutile-TiO2(110)".Journal of Physical Chemistry C 124.27(2020):14632-14639.