NH3•H2O-assisted solvent thermal synthesis of mesoporous spherical NiCo2O4 nanomaterials having rich oxygen vacancies for enhanced activity of CH3OH electrooxidation

2021 ◽  
pp. 138794
Author(s):  
Mojie Sun ◽  
Chi Wang ◽  
Shijie Wang ◽  
Zhao Wang ◽  
Zhe Wang ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Thermal Synthesis ◽  
Enhanced Activity

scholarly journals Photocatalysis: Operando Oxygen Vacancies for Enhanced Activity and Stability toward Nitrogen Photofixation (Adv. Energy Mater. 43/2019)

2019 ◽  
Vol 9 (43) ◽  
pp. 1970170
Author(s):  
Tingting Hou ◽  
Yu Xiao ◽  
Peixin Cui ◽  
Yining Huang ◽  
Xiaoping Tan ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Enhanced Activity ◽  
Energy Mater

Enhanced Activity for CO Oxidation over Pr- and Cu-Doped CeO2 Catalysts: Effect of Oxygen Vacancies

2008 ◽  
Vol 112 (38) ◽  
pp. 15045-15051 ◽  
Author(s):  
Zhi-Ying Pu ◽  
Xue-Song Liu ◽  
Ai-Ping Jia ◽  
Yun-Long Xie ◽  
Ji-Qing Lu ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Oxygen Vacancies ◽  
Enhanced Activity ◽  
Doped Ceo2 ◽  
Effect Of Oxygen

Anchoring High-Concentration Oxygen Vacancies at Interfaces of CeO2–x/Cu toward Enhanced Activity for Preferential CO Oxidation

2015 ◽  
Vol 7 (41) ◽  
pp. 22999-23007 ◽  
Author(s):  
Shaoqing Chen ◽  
Liping Li ◽  
Wanbiao Hu ◽  
Xinsong Huang ◽  
Qi Li ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Oxygen Vacancies ◽  
High Concentration ◽  
Preferential Co Oxidation ◽  
Enhanced Activity

Operando Oxygen Vacancies for Enhanced Activity and Stability toward Nitrogen Photofixation

2019 ◽  
Vol 9 (43) ◽  
pp. 1902319 ◽  
Author(s):  
Tingting Hou ◽  
Yu Xiao ◽  
Peixin Cui ◽  
Yining Huang ◽  
Xiaoping Tan ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Enhanced Activity

Conditions for atomic imaging of mullite

1989 ◽  
Vol 47 ◽  
pp. 418-419
Author(s):  
T. A. Epicier ◽  
G. Thomas
Keyword(s):  
Oxygen Vacancies ◽  
High Resolution Electron Microscopy ◽  
Ceramic Materials ◽  
Work Conditions ◽  
Real Space ◽  
Potential Candidate ◽  
Silicate Mineral ◽  
Resolution Electron ◽  
The Subject ◽  
Aluminium Silicate

Mullite is an aluminium-silicate mineral of current interest since it is a potential candidate for high temperature applications in the ceramic materials field.In the present work, conditions under which the structure of mullite can be optimally imaged by means of High Resolution Electron Microscopy (HREM) have been investigated. Special reference is made to the Atomic Resolution Microscope at Berkeley which allows real space information up to ≈ 0.17 nm to be directly transferred; numerous multislice calculations (conducted with the CEMPAS programs) as well as extensive experimental through-focus series taken from a commercial “3:2” mullite at 800 kV clearly show that a resolution of at least 0.19 nm is required if one wants to get a straightforward confirmation of atomic models of mullite, which is known to undergo non-stoichiometry associated with the presence of oxygen vacancies.Indeed the composition of mullite ranges from approximatively 3Al2O3-2SiO2 (referred here as 3:2-mullite) to 2Al2O3-1SiO2, and its structure is still the subject of refinements (see, for example, refs. 4, 5, 6).

Investigation of Some Characterizations of Black TiO\(_2\) Nanotubes Via Spectroscopic Methods

2019 ◽  
Vol 29 (2) ◽  
pp. 189 ◽  
Author(s):  
Tho Truong Nguyen ◽  
Thi Minh Cao ◽  
Hieu Van Le ◽  
Viet Van Pham
Keyword(s):  
Water Splitting ◽  
Oxygen Vacancies ◽  
Light Response ◽  
Nanotube Arrays ◽  
Spectroscopic Methods ◽  
Visible Light Response ◽  
Uv Visible ◽  
Visible Reflectance ◽  
Splitting Effect ◽  
Anodization Method

The black TiO\(_2\) with substantial Ti\(^3+\) and oxygen vacancies exhibit an excellent photoelectrochemical water-splitting performance due to the improved charge transport the extended visible light response. In this study, black TiO\(_2\) nanotube arrays synthesized by the anodization method, and then, they have been investigated some characterizations by spectroscopic methods such as UV-visible reflectance (UV-vis DRS), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, and photoluminescence spectrum. The results showed that some highlighted properties of the black TiO2 nanotube arrays and they could apply for water-splitting effect.

Controlled Growth of the Non-centrosymmetric Zn(3-ptz)2 and Zn(Oh)(3-ptz) Metal-organic Frameworks

2019 ◽  
Author(s):  
javier enriquez ◽  
Ignacio Chi-Duran ◽  
Carolina Manquian ◽  
Felipe Herrera ◽  
Ruben Fritz ◽  
...  
Keyword(s):  
Single Crystal ◽  
Nonlinear Optical ◽  
Metal Organic Frameworks ◽  
Molar Ratio ◽  
Thermal Synthesis ◽  
Small Crystals ◽  
Alkaline Environments ◽  
Potential Applications ◽  
Metal Organic ◽  
Long Rod

Non-centrosymmetric single-crystal metal-organic frameworks (MOF) are promising candidates for phase-matched nonlinear optical communication, but typical hydrothermal synthesis produces small crystals with relatively low transmittance and poor phase matching. We study the effect of the metal-to-ligand molar ratio and reaction pH on the hydro-thermal synthesis of the non-centrosymmetric Zn(3-ptz)<sub>2</sub> and Zn(OH)(3-ptz) MOFs with <i>in-situ </i>ligand formation. In acidic environments, we find that decreasing the amount of ligand below the stoichiometric molar ratio 1:2 also produces highly transparent single-crystal octahedrons of <b>Zn(3-ptz)<sub>2</sub></b>. In alkaline environments, we obtain long rod-like <b>Zn(OH)(3-ptz) </b>crystals whose length exceeds previous reports by up to four orders of magnitude. Potential applications of these results in the development of MOF-based nonlinear optical devices are discussed.

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