Differentiated Oxygen Evolution Behavior in MOF-Derived Oxide Nanomaterials Induced by Phase Transition

2021 ◽  
Author(s):  
Li Zhong ◽  
Xian Wang ◽  
Yuanyuan Guo ◽  
Junyang Ding ◽  
Qi Huang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Oxygen Evolution ◽  
Evolution Behavior

How to get to best oxygen evolution behavior from the electrolysis practice of the seawater

2021 ◽  
Vol 46 (24) ◽  
pp. 12936-12943
Author(s):  
Jun Lu ◽  
Chenglin Li ◽  
Hui Wang ◽  
Shan Ji ◽  
Xuyun Wang ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Evolution Behavior

Study of Phase Transition and Domain Evolution Behavior in PZN-PT Single Crystal

2016 ◽  
Vol 491 (1) ◽  
pp. 35-43 ◽  
Author(s):  
Jun Qian ◽  
Jiayue Xu ◽  
Hongyang Zhao ◽  
Xin Yao ◽  
Min Jin ◽  
...  
Keyword(s):  
Phase Transition ◽  
Single Crystal ◽  
Domain Evolution ◽  
Evolution Behavior

Amorphous NiMS (M: Co, Fe or Mn) holey nanosheets derived from crystal phase transition for enhanced oxygen evolution in water splitting

2019 ◽  
Vol 323 ◽  
pp. 134756 ◽  
Author(s):  
Congli Qin ◽  
Aixin Fan ◽  
Danhua Ren ◽  
Chenglong Luan ◽  
Juntao Yang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Crystal Phase ◽  
Crystal Phase Transition

THE HIGH TEMPERATURE RESISTIVITY OF Ba2YCu3O7−x

1988 ◽  
Vol 01 (09n10) ◽  
pp. 389-392 ◽  
Author(s):  
ZHANG XINGKUI ◽  
ZHU SHINING ◽  
WANG HAO ◽  
ZHANG SHIYUAN ◽  
YE SU ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Oxygen Evolution ◽  
Tetragonal Phase ◽  
Room Temperature ◽  
Drude Model ◽  
Temperature Resistivity ◽  
Derivative Thermogravimetry ◽  
Tetragonal Phase Transition

The high temperature resistivity (ρ), thermogravimetry (TG) and derivative thermogravimetry (DTG) have been used to characterize superconductor Ba2YCu3O7−x (BYCO) in O2, air and N2. The resistivity is linear from room temperature to 350°C and then deviate from linearity with oxygen evolution, the derivative of resistivity dρ/dT increases abruptly near orthorhombic to tetragonal phase transition. These phenomena can give good explanations for a two-band Drude model.

Oxygen Evolution Behavior of PTFE-F-PbO2 Electrode in H2SO4 Solution

2008 ◽  
Vol 16 (6) ◽  
pp. 885-889 ◽  
Author(s):  
Shaoping TONG ◽  
Tieming ZHANG ◽  
Chun'an MA
Keyword(s):  
Oxygen Evolution ◽  
H2so4 Solution ◽  
Pbo2 Electrode ◽  
Evolution Behavior

Microstructure of laser-irradiated, conducting Kapton polyimide

1995 ◽  
Vol 53 ◽  
pp. 502-503
Author(s):  
D. L. Callahan ◽  
Z. Ball ◽  
H. M. Phillips ◽  
R. Sauerbrey
Keyword(s):  
Electron Microscopy ◽  
Phase Transition ◽  
Transmission Electron Microscopy ◽  
Cross Section ◽  
Film Surface ◽  
Cross Sectional ◽  
General Utility ◽  
Transmission Electron ◽  
Considerable Debate ◽  
Potential Applications

Ultraviolet laser-irradiation can be used to induce an insulator-to-conductor phase transition on the surface of Kapton polyimide. Such structures have potential applications as resistors or conductors for VLSI applications as well as general utility electrodes. Although the percolative nature of the phase transformation has been well-established, there has been little definitive work on the mechanism or extent of transformation. In particular, there has been considerable debate about whether or not the transition is primarily photothermal in nature, as we propose, or photochemical. In this study, cross-sectional optical microscopy and transmission electron microscopy are utilized to characterize the nature of microstructural changes associated with the laser-induced pyrolysis of polyimide.Laser-modified polyimide samples initially 12 μm thick were prepared in cross-section by standard ultramicrotomy. Resulting contraction in parallel to the film surface has led to distortions in apparent magnification. The scale bars shown are calibrated for the direction normal to the film surface only.

The structure of membranes and membrane proteins embedded in amorphous ice

1992 ◽  
Vol 50 (1) ◽  
pp. 432-433
Author(s):  
Uwe Lücken ◽  
Joachim Jäger
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Membrane Proteins ◽  
Phase Transition Temperature ◽  
Lipid Vesicles ◽  
Freezing Stress ◽  
Amorphous Ice ◽  
Different Temperatures ◽  
Band Pass ◽  
Lipid Polymorphism

TEM imaging of frozen-hydrated lipid vesicles has been done by several groups Thermotrophic and lyotrophic polymorphism has been reported. By using image processing, computer simulation and tilt experiments, we tried to learn about the influence of freezing-stress and defocus artifacts on the lipid polymorphism and fine structure of the bilayer profile. We show integrated membrane proteins do modulate the bilayer structure and the morphology of the vesicles.Phase transitions of DMPC vesicles were visualized after freezing under equilibrium conditions at different temperatures in a controlled-environment vitrification system. Below the main phase transition temperature of 24°C (Fig. 1), vesicles show a facetted appearance due to the quasicrystalline areas. A gradual increase in temperature leads to melting processes with different morphology in the bilayer profile. Far above the phase transition temperature the bilayer profile is still present. In the band-pass-filtered images (Fig. 2) no significant change in the width of the bilayer profile is visible.

Electron Microscope study of commensurate-incommensurate phase transition in BaZnGeO4

1990 ◽  
Vol 48 (4) ◽  
pp. 172-173
Author(s):  
Naoki Yamamoto ◽  
Makoto Kikuchi ◽  
Tooru Atake ◽  
Akihiro Hamano ◽  
Yasutoshi Saito
Keyword(s):  
Phase Transition ◽  
Electron Microscope Study ◽  
Room Temperature ◽  
Hexagonal Lattice ◽  
Ferroelectric Materials ◽  
Temperature Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Periodic Arrays ◽  
Modulation Wave Vector

BaZnGeO4 undergoes many phase transitions from I to V phase. The highest temperature phase I has a BaAl2O4 type structure with a hexagonal lattice. Recent X-ray diffraction study showed that the incommensurate (IC) lattice modulation appears along the c axis in the III and IV phases with a period of about 4c, and a commensurate (C) phase with a modulated period of 4c exists between the III and IV phases in the narrow temperature region (—58°C to —47°C on cooling), called the III' phase. The modulations in the IC phases are considered displacive type, but the detailed structures have not been studied. It is also not clear whether the modulation changes into periodic arrays of discommensurations (DC’s) near the III-III' and IV-V phase transition temperature as found in the ferroelectric materials such as Rb2ZnCl4.At room temperature (III phase) satellite reflections were seen around the fundamental reflections in a diffraction pattern (Fig.1) and they aligned along a certain direction deviated from the c* direction, which indicates that the modulation wave vector q tilts from the c* axis. The tilt angle is about 2 degree at room temperature and depends on temperature.

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