scholarly journals The role of oxygen vacancies on the vibrational motions of hydride ions in the oxyhydride of barium titanate

2020 ◽  
Vol 8 (13) ◽  
pp. 6360-6371 ◽  
Author(s):  
Carin Eklöf-Österberg ◽  
Laura Mazzei ◽  
Erik Jedvik Granhed ◽  
Göran Wahnström ◽  
Reji Nedumkandathil ◽  
...  
Keyword(s):  
Barium Titanate ◽  
Oxygen Vacancies ◽  
Dft Study ◽  
Vibrational Dynamics ◽  
Effect Of Oxygen ◽  
Hydride Ions

Combined INS and DFT study on BaTiO3−xHx unravels the effect of oxygen vacancies on the vibrational dynamics of hydride ions.

The role of oxygen vacancies in improving the performance of CoO as a bifunctional cathode catalyst for rechargeable Li–O2 batteries

2015 ◽  
Vol 3 (34) ◽  
pp. 17598-17605 ◽  
Author(s):  
Rui Gao ◽  
Lei Liu ◽  
Zhongbo Hu ◽  
Peng Zhang ◽  
Xingzhong Cao ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Cathode Catalyst ◽  
Effect Of Oxygen

The effect of oxygen vacancies on the performance of CoO as a cathode catalyst for Li–O2 batteries has been investigated.

Analysis of Oxygen Vacancy Trapping at [001] Symmetric Tilt Grain Boundaries in Barium Titanate by Atomistic Simulations

2010 ◽  
Vol 445 ◽  
pp. 39-42 ◽  
Author(s):  
Takashi Oyama ◽  
Nobuyuki Wada ◽  
Hiroshi Takagi
Keyword(s):  
Barium Titanate ◽  
Grain Boundaries ◽  
Atomistic Simulation ◽  
Oxygen Vacancies ◽  
Atomistic Simulations ◽  
Multilayer Ceramic Capacitors ◽  
Simulation Techniques ◽  
Electrical Degradation ◽  
Symmetric Tilt

The role of grain boundaries (GBs) in the diffusion of oxygen vacancies (VO••s) in barium titanate (BaTiO3) and its mechanism were investigated using atomistic simulation techniques. It was found that GBs trapped VO••s at specific sites in the course of the diffusion, and the excess energy reflecting structural distortion of the GB was closely related to the availability of the trapping. GBs therefore act as a resistance of the diffusion of VO••s, suggesting that electrical degradation of multilayer ceramic capacitors (MLCCs), which is derived from vacancy diffusion, enables to be additionally improved by controlling GB structures in BaTiO3-based dielectrics.

Effect of oxygen vacancies in electrodeposited NiO towards the oxygen evolution reaction: Role of Ni-Glycine complexes

2018 ◽  
Vol 268 ◽  
pp. 49-58 ◽  
Author(s):  
E. Arciga-Duran ◽  
Y. Meas ◽  
J.J. Pérez-Bueno ◽  
J.C. Ballesteros ◽  
G. Trejo
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Oxygen Vacancies ◽  
Effect Of Oxygen

scholarly journals Analysis of Electric Transport Mechanism of Barium Titanate by Impedance Spectroscopy

2018 ◽  
Vol 778 ◽  
pp. 206-211 ◽  
Author(s):  
Nudrat Humera ◽  
Hadia Noor ◽  
Saira Riaz ◽  
Shahzad Naseem
Keyword(s):  
Barium Titanate ◽  
Impedance Spectroscopy ◽  
Oxygen Vacancies ◽  
Impedance Analysis ◽  
Solid State Reaction Method ◽  
Dielectric Behavior ◽  
Electric Transport ◽  
Temperature Dependent ◽  
Nyquist Plots

Barium titanate (BTO) samples were prepared by nanomilling based solid state reaction method. Dielectric behavior of BTO sample has been investigated by temperature dependent impedance spectroscopy. The impedance analysis of BTO samples confirm that hopping of electrons and defects coexisted in sample and contribution of grain and grain boundary to dielectric behavior is discussed. A single semicircular arc obtained by Nyquist plots whose radius decreased with increase in temperature illustrates the prominent role of grains. The activation energy of defects was calculated from Arrhenius plot. These defects may be due to oxygen vacancies and hopping between Ti+4 to Ti+3 ions.

The role of Sn in enhancing the visible-light photocatalytic activity of hollow hierarchical microspheres of the Bi/BiOBr heterojunction

2015 ◽  
Vol 17 (12) ◽  
pp. 8078-8086 ◽  
Author(s):  
Xingmiao Zhang ◽  
Guangbin Ji ◽  
Yousong Liu ◽  
Xuguang Zhou ◽  
Yan Zhu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Synergistic Effect ◽  
Charge Separation ◽  
Oxygen Vacancies ◽  
Separation Efficiency ◽  
Hierarchical Microspheres ◽  
Charge Separation Efficiency ◽  
Effect Of Oxygen ◽  
Visible Light Photocatalytic

The synergistic effect of oxygen vacancies and the Bi/BiOBr heterojunction broadens the light absorption range and promotes the charge separation efficiency.

A DFT study on the effect of oxygen vacancies and H2O in Mn-MOF-74 on SCR reactions

2019 ◽  
Vol 21 (35) ◽  
pp. 19226-19233 ◽  
Author(s):  
Minhua Zhang ◽  
Kun Gu ◽  
Xuewei Huang ◽  
Yifei Chen
Keyword(s):  
Oxygen Vacancies ◽  
Dft Study ◽  
Hydroxyl Oxygen ◽  
Effect Of Oxygen

The carboxyl and hydroxyl oxygen vacancies in Mn-MOF-74 can not only activate the reaction species, but also promote the desorption of NO2 molecules from metal sites for the subsequent rapid SCR reactions.

Balanced performance for β-Ga2O3 solar blind photodetectors: The role of oxygen vacancies

2021 ◽  
Vol 112 ◽  
pp. 110808
Author(s):  
Jiang Wang ◽  
Yuanqiang Xiong ◽  
Lijuan Ye ◽  
Wanjun Li ◽  
Guoping Qin ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Solar Blind
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