Evidence for the intrinsic nature of band-gap states electrochemically observed on atomically flat TiO2(110) surfaces
Literature Information
Shintaro Takata, Yoshihiro Miura
Using an ultra-high vacuum (UHV) electrochemistry approach with pulsed laser deposition (PLD), we investigated the band-gap state for TiO2(110). In the PLD chamber, a TiO2(110) surface was cleaned by annealing in O2 enough for it to exhibit a sharp (1 × 1) reflection high energy electron diffraction (RHEED) pattern. The cleaned TiO2(110)-(1 × 1) sample then underwent electrochemical measurements without exposure to air, showing the band-gap state at −0.14 V vs. Ag by Mott–Schottky plot analysis. The band-gap state gradually disappeared under UV illumination at +0.6 V vs. Ag due to photoetching, and reappeared on reduction in a vacuum and/or deposition of a fresh TiO2 film. These results indicated that the electrochemically observed band-gap state for TiO2(110) was a defect state due to oxygen deficiency, most probably identical to that observed under UHV, which does not necessarily exist on the surface. A quantitative analysis of the defect density suggests that the origin of this defect state is not the surface bridging hydroxyls or oxygen vacancies, but rather the interstitial Ti3+ ions in the subsurface region.
Recommended Journals
Related Literature
Coke relocation and Mo immobilization in donut-shaped Mo/HZSM-5 catalysts for methane dehydroaromatization
Ming Cheng, Hugo Cruchade, Ludovic Pinard, Eddy Dib, Honghai Liu, Jiujiang Wang, Xinmei Liu, Zi-Feng Yan, Zhengxing Qin, Svetlana Mintova
DOI: 10.1039/D3TA05418G
In situ formation of a ZnS/In interphase for reversible Zn metal anodes at ultrahigh currents and capacities
Chengwu Yang, Pattaraporn Woottapanit, Jin Cao, Yilei Yue, Dongdong Zhang, Jin Yi, Zhiyuan Zeng, Xinyu Zhang, Jiaqian Qin, Yonggang Wang
DOI: 10.1039/D3TA05650C
Linker engineering to regulate the fluorescence of hydrazone-linked covalent organic frameworks for the real-time visual detection of norfloxacin and multiple information encryption
Haifei Wan, Mengyao Li, Li Wang, Yonghai Song
DOI: 10.1039/D3TA04781D
A single-phase gadolinium-doped ceria cathode for highly efficient CO2 electrolysis
Ahmad Shaur, Michel Drazkowski, Shaochen Zhu, Bernard Boukamp
DOI: 10.1039/D3TA03977C
A solely biobased strain sensor with an ultra-precision response via a surface graphitization strategy
Zhihao Yang, Ying Yuan, Bin Wang, Xiaojun Shen, Xiluan Wang, Tong-Qi Yuan
DOI: 10.1039/D3TA04872A
Self-organized defect-rich RuMOx epitaxial layers (M = Mn, Fe, Co, Ni, Cu) for catalytic applications
Risa Ichihashi, Yuta Yamamoto, Kyoichi Sawabe
DOI: 10.1039/D3TA05078E
Contact engineering for 2D Janus MoSSe/metal junctions
Yu Shu, Ting Li, Naihua Miao, Jian Gou, Xiaochun Huang, Zhou Cui, Rui Xiong, Cuilian Wen, Jian Zhou, Baisheng Sa, Zhimei Sun
DOI: 10.1039/D3NH00450C
You might also like
What precautions should be taken when handling lithium chloride hydrate (1:1:1) (CAS: 16712-20-2)?
When handling lithium chloride hydrate (1:1:1) (CAS: 16712-20-2), it is importan...
Is 4-(4H-1,2,4-Triazol-4-yl)piperidine (CAS: 690261-92-8) safe?
4-(4H-1,2,4-Triazol-4-yl)piperidine is generally considered safe for use in phar...
How should waste containing 1,3-Thiazole-2-carboxamide (CAS: 16733-85-0) be handled?
Waste containing 1,3-Thiazole-2-carboxamide (CAS: 16733-85-0) should be collecte...
What regulatory guidelines apply to 5-(Difluoromethyl)-2-fluorobenzonitrile (CAS: 934175-58-3)?
5-(Difluoromethyl)-2-fluorobenzonitrile (CAS: 934175-58-3) is subject to regulat...
How is Methyl 3-acetamido-2-thiophenecarboxylate (CAS: 22288-79-5) typically synthesized?
Methyl 3-acetamido-2-thiophenecarboxylate can be synthesized by the reaction of ...
What is 4-Isoquinolinecarbonitrile (CAS: 34846-65-6)?
4-Isoquinolinecarbonitrile is a chemical compound with the CAS number 34846-65-6...
How should Methyl 1H-1,2,3-triazole-4-carboxylate (CAS: 877309-59-6) be stored?
Store Methyl 1H-1,2,3-triazole-4-carboxylate (CAS: 877309-59-6) in a cool, dry p...
What regulatory guidelines apply to 6-Bromo[1,3]thiazolo[5,4-b]pyridin-2-amine (CAS: 1160791-13-8)?
6-Bromo[1,3]thiazolo[5,4-b]pyridin-2-amine (CAS: 1160791-13-8) is subject to the...
Is (2S,3S)-2-Ammonio-3-(3,4-dihydroxyphenyl)-3-hydroxypropanoate (CAS: 23651-95-8) safe?
(2S,3S)-2-Ammonio-3-(3,4-dihydroxyphenyl)-3-hydroxypropanoate (CAS: 23651-95-8) ...
What are the physical and chemical properties of 7-bromo-3-methyl-3,4-dihydroquinazolin-4-one (CAS: 1293987-84-4)?
7-Bromo-3-methyl-3,4-dihydroquinazolin-4-one is a solid with a crystalline form....
Source Journal
Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.










![(R)-N-[(S)-1-[2-(Diphenylphosphino)phenyl]ethyl]-2-methylpropane-2-sulfinamide structure (R)-N-[(S)-1-[2-(Diphenylphosphino)phenyl]ethyl]-2-methylpropane-2-sulfinamide structure](https://static.chemtradehub.com/structs/159/1595319-98-4-33e7.webp)
![[(2R)-6,6-Dimethyl-2-morpholinyl]methanol hydrochloride (1:1) structure [(2R)-6,6-Dimethyl-2-morpholinyl]methanol hydrochloride (1:1) structure](https://static.chemtradehub.com/structs/141/1416444-88-6-e06a.webp)


![N-[2-(2-Pyridinyl)ethyl]-1-propanamine structure N-[2-(2-Pyridinyl)ethyl]-1-propanamine structure](https://static.chemtradehub.com/structs/554/55496-57-6-22b4.webp)