Active Species in Photocatalytic Reactions of Methanol on TiO2(110) Identified by Surface Sum Frequency Generation Vibrational Spectroscopy

Peng, Xingxing1,2,3; Zhang, Ruidan1,2,3; Feng, Ran-ran1,2,4; Liu, An-an1,2; Zhou, Chuanyao3; Guo, Qing3; Yang, Xueming3,5; Jiang, Ying1,2; Ren, Zefeng1,2,3

2019-06-06

10.1021/acs.jpcc.9b03922

Journal of Physical Chemistry C   影响因子和分区

1932-7447

The photocatalytic reactivity of one monolayer of methanol on TiO2(110) was measured with the surface sum frequency generation vibrational spectroscopy in the C-H stretching range, which shows high photon energy dependence. The photocatalytic reactivity was systematically investigated for different active species on TiO2(110), dissociative adsorbed methanol at five-coordinated Ti sites (Ti-5c), methoxy without adsorbed methanol at Ti-5c sites, and methoxy O-b sites. The results show that the methoxy at Ti-5c sites has much higher photocatalytic reactivity than that of dissociative adsorbed methanol at Ti-5c sites, and the methoxy at O-b sites might be inactive. This work demonstrates that methoxy at Ti-5c sites is the most active species on TiO2(110) and suggests that effectively removing surface OH could enhance the photodegradation of surface organics.

SCI ; EI

英语

其他

Youth Innovation Promotion Association of CAS[2017224]

Chemistry ; Science & Technology - Other Topics ; Materials Science

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

WOS:000470938400049

AMER CHEMICAL SOC

20192507054870

Dissociation ; Interferometry ; Titanium dioxide ; Vibrational spectroscopy

Chemical Reactions:802.2 ; Organic Compounds:804.1 ; Inorganic Compounds:804.2 ; Optical Variables Measurements:941.4 ; Mechanical Variables Measurements:943.2

Web of Science

1.Peking Univ, ICQM, 5 Yiheyuan Rd, Beijing 100871, Peoples R China
2.Peking Univ, Sch Phys, 5 Yiheyuan Rd, Beijing 100871, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, 457 Zhongshan Rd, Dalian 116023, Liaoning, Peoples R China
4.Chinese Acad Sci, Inst Mech, Beijing Key Lab Engn Construct & Mech, Key Lab Micrograv,Natl Micrograv Lab, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China
5.Southern Univ Sci & Technol, Dept Chem, 1088 Xueyuan Rd, Shenzhen 518055, Guangdong, Peoples R China

Peng, Xingxing,Zhang, Ruidan,Feng, Ran-ran,et al. Active Species in Photocatalytic Reactions of Methanol on TiO2(110) Identified by Surface Sum Frequency Generation Vibrational Spectroscopy[J]. Journal of Physical Chemistry C,2019,123(22):13789-13794.

Peng, Xingxing.,Zhang, Ruidan.,Feng, Ran-ran.,Liu, An-an.,Zhou, Chuanyao.,...&Ren, Zefeng.(2019).Active Species in Photocatalytic Reactions of Methanol on TiO2(110) Identified by Surface Sum Frequency Generation Vibrational Spectroscopy.Journal of Physical Chemistry C,123(22),13789-13794.

Peng, Xingxing,et al."Active Species in Photocatalytic Reactions of Methanol on TiO2(110) Identified by Surface Sum Frequency Generation Vibrational Spectroscopy".Journal of Physical Chemistry C 123.22(2019):13789-13794.