In Situ Studies on Temperature-Dependent Photocatalytic Reactions of Methanol on TiO2(110)

Zhang, Ruidan1,2,3; Wang, Haochen3; Peng, Xingxing1,2,3; Peng, Ran-ran1,2,4; Liu, An-an1,2; Guo, Qing3; Zhou, Chuanyao3; Ma, Zhibo3; Yang, Xueming3,5; Jiang, Ying1,2; Ren, Zefeng1,2,3

2019-04-18

10.1021/acs.jpcc.9b02244

Journal of Physical Chemistry C   影响因子和分区

1932-7447

We studied the photocatalytic reaction of methanol on the TiO2(110) surface in situ by surface sum frequency generation vibrational spectroscopy. The in situ vibrational spectra of the photo-oxidation product, formaldehyde and methyl formate, on TiO2(110) was unambiguously assigned and identified. The temperature-dependent photocatalytic reaction efficiency was observed and suggested that the thermal diffusion might be important for the photocatalytic reaction. Scanning tunneling microscopy combined with ultraviolet light was used to investigate the photocatalytic reaction efficiency on the hydrox-ylated TiO2(110) surface, which shows that the neighboring hydroxyl group on the bridge-bonded oxygen site dramatically inhibits the photo oxidation of methanol because of the repulsion between hydroxyl groups. Our results provide direct vibrational spectral evidence of photo-oxidation products of methanol on TiO2(110), show the importance of thermal processes in surface photocatalytic reactions, and deepen our understanding on photochemistry on this surface.

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:000465488600041

AMER CHEMICAL SOC

20191706840776

Efficiency ; Methanol ; Oxidation ; Scanning tunneling microscopy ; Titanium dioxide

Chemical Reactions:802.2 ; Organic Compounds:804.1 ; Inorganic Compounds:804.2 ; Production Engineering:913.1

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, Key Lab Micrograv, Natl Micrograv Lab,Beijing Key Lab Engineered Con, Beijing 100190, Peoples R China
5.Southern Univ Sci & Technol, Dept Chem, 1088 Xueyuan Rd, Shenzhen 518055, Guangdong, Peoples R China

Zhang, Ruidan,Wang, Haochen,Peng, Xingxing,et al. In Situ Studies on Temperature-Dependent Photocatalytic Reactions of Methanol on TiO2(110)[J]. Journal of Physical Chemistry C,2019,123(15):9993-9999.

Zhang, Ruidan.,Wang, Haochen.,Peng, Xingxing.,Peng, Ran-ran.,Liu, An-an.,...&Ren, Zefeng.(2019).In Situ Studies on Temperature-Dependent Photocatalytic Reactions of Methanol on TiO2(110).Journal of Physical Chemistry C,123(15),9993-9999.

Zhang, Ruidan,et al."In Situ Studies on Temperature-Dependent Photocatalytic Reactions of Methanol on TiO2(110)".Journal of Physical Chemistry C 123.15(2019):9993-9999.