Thermoelectric Properties of Non-Stoichiometric Magnéli Phase TinO2n–1 (n = 4, 5, 8, 9) Monoliths

2018 ◽  
Vol 10 (1) ◽  
pp. 39-45 ◽  
Author(s):  
Guangrui Wang ◽  
Ying Liu ◽  
Jinwen Ye
Keyword(s):  
Thermoelectric Properties ◽  
Magnéli Phase ◽  
Magneli Phase

Enhanced thermoelectric properties of the n-type Magnéli phase WO2.90: reduced thermal conductivity through microstructure engineering

2014 ◽  
Vol 2 (33) ◽  
pp. 13492-13497 ◽  
Author(s):  
Gregor Kieslich ◽  
Ulrich Burkhardt ◽  
Christina S. Birkel ◽  
Igor Veremchuk ◽  
Jason E. Douglas ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Properties ◽  
Magnéli Phase ◽  
Magneli Phase

The thermoelectric properties of the Magnéli phase WO2.90 were investigated, with special attention to how the performance can be altered by changing its microstructure.

Modeling the Thermoelectric Properties of Ti5O9 Magnéli Phase Ceramics

2016 ◽  
Vol 45 (11) ◽  
pp. 5526-5532 ◽  
Author(s):  
Sudeep J. Pandey ◽  
Giri Joshi ◽  
Shidong Wang ◽  
Stefano Curtarolo ◽  
Romain M. Gaume
Keyword(s):  
Thermoelectric Properties ◽  
Magnéli Phase ◽  
Magneli Phase

Electrochemical Oxidation of Perfluorooctanesulfonate by Magnéli Phase Ti4O7 Electrode in the Presence of Trichloroethylene

2020 ◽  
Vol 1 (4) ◽  
Author(s):  
Peizeng Yang ◽  
Yaye Wang ◽  
Junhe Lu ◽  
Viktor Tishchenko ◽  
Qingguo Huang ◽  
...  
Keyword(s):  
Electrochemical Oxidation ◽  
Current Density ◽  
First Order ◽  
Degradation Rates ◽  
Oxidation Technology ◽  
Magnéli Phase ◽  
Polyfluoroalkyl Substances ◽  
Titanium Suboxide ◽  
Gas Tight ◽  
Magneli Phase

This study examined the degradation of perfluorooctanesulfonate (PFOS) in electrochemical oxidation (EO) processes in the presence of trichloroethylene (TCE). The EO experiment was performed in a gas-tight reactor using Magnéli phase titanium suboxide (Ti4O7) as the anode. The experimental data demonstrated that 75% of PFOS (2 μM) was degraded at 10 mA/cm2 current density in 30 min without TCE present in the solution, while the presence of 76 μM TCE apparently inhibited the degradation of PFOS, reducing its removal down to 53%. Defluorination ratio suggested that PFOS was significantly mineralized upon EO treatment, and it appeared to be not influenced by the presence of TCE. The respective pseudo-first order rate constants (kobs) of PFOS removal were 0.0471 and 0.0254 min-1 in the absence and presence of TCE. The degradation rates of both PFOS and TCE increased with current density rising from 2.5 to 20 mA/cm2. In the presence of TCE, chloride, chlorate, and perchlorate were formed that accounted for 79.7 %, 5.53%, and 1.51% of the total chlorine at 60 min. This work illustrates the promise of the Magnéli phase Ti4O7 electrode based electrochemical oxidation technology for degrading per- and polyfluoroalkyl substances (PFASs) and co-contaminants in groundwaters.

Reduction in the Thermal Conductivity of Thermoelectric Titanium Oxide by Introduction of Planar Defects

2009 ◽  
Vol 1218 ◽  
Author(s):  
Shunta Harada ◽  
Katsushi Tanaka ◽  
Haruyuki Inui
Keyword(s):  
Thermal Conductivity ◽  
Titanium Oxide ◽  
Hot Pressing ◽  
Oxygen Deficiency ◽  
Nominal Composition ◽  
Titanium Oxides ◽  
X Ray Diffraction ◽  
Planar Defects ◽  
Magnéli Phase ◽  
Magneli Phase

AbstractThermoelectric properties of a homologous series of Magnéli phase titanium oxides TinO2n-1 (n = 2, 3..) have been investigated. Dense polycrystalline specimens with nominal composition of TiO2-x (x = 0.10, 0.20) have been prepared by conventional hot-pressing. X-ray diffraction analysis has revealed that prepared specimens are slightly reduced during hot-pressing. Electrical conduction is of n-type for all prepared titanium oxides and electrical resistivity and absolute values of Seebeck coefficient decrease with increasing oxygen deficiency. The carrier concentration of Magnéli phase titanium oxide increases with increasing oxygen deficiency. Lattice thermal conductivity decreases with increasing oxygen deficiency by more than 60% at room temperature and 40% at 773K compared to TiO2, which can be due to the presence of dense planar defects. The largest thermoelectric figure of merit Z, 1.6×10-4 K-1 at 773K, was obtained in TiO1.90 hot pressed specimen.

Electro-oxidation of tetracycline by a Magnéli phase Ti4O7 porous anode: Kinetics, products, and toxicity

2018 ◽  
Vol 332 ◽  
pp. 628-636 ◽  
Author(s):  
Shangtao Liang ◽  
Hui Lin ◽  
Xiufen Yan ◽  
Qingguo Huang
Keyword(s):  
Electro Oxidation ◽  
Magnéli Phase ◽  
Porous Anode ◽  
Magneli Phase

MnCo2O4 decorated Magnéli phase titanium oxide as a carbon-free cathode for Li–O2 batteries

2017 ◽  
Vol 5 (37) ◽  
pp. 19991-19996 ◽  
Author(s):  
Xuecheng Cao ◽  
Zhihui Sun ◽  
Xiangjun Zheng ◽  
Jinghua Tian ◽  
Chao Jin ◽  
...  
Keyword(s):  
Titanium Oxide ◽  
Electrocatalytic Activity ◽  
High Performance ◽  
Electronic Conductivity ◽  
Synergistic Interaction ◽  
High Electronic Conductivity ◽  
Magnéli Phase ◽  
First Time ◽  
Magneli Phase

The application of MnCo2O4 (MCO) decorated Ti4O7 as a carbon-free cathode for Li–O2 batteries is reported for the first time. The high performance of Ti4O7/MCO cathode is attributed to the high electronic conductivity of Ti4O7, the high electrocatalytic activity of MCO and the synergistic interaction between Ti4O7 and MCO toward ORR and OER.

MagnéLi-Phase Ti4O7-Supported Irru-Based Catalysts for Reversal Tolerant Anode of Automotive Polymer Electrolyte Membrane Fuel Cell

2020 ◽  
Vol MA2020-01 (38) ◽  
pp. 1656-1656
Author(s):  
Seung Woo Lee ◽  
Bong Ho Lee ◽  
Chaekyung Baik ◽  
Eunyoung You ◽  
Dae Jong You ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Electrolyte Membrane ◽  
Magnéli Phase ◽  
Magneli Phase

scholarly journals Magneli-Phase Titanium Suboxide Nanocrystals as Highly Active Catalysts for Selective Acetalization of Furfural

2019 ◽  
Vol 12 (2) ◽  
pp. 2539-2547 ◽  
Author(s):  
Masanori Nagao ◽  
Sayaka Misu ◽  
Jun Hirayama ◽  
Ryoichi Otomo ◽  
Yuichi Kamiya
Keyword(s):  
Highly Active ◽  
Magnéli Phase ◽  
Titanium Suboxide ◽  
Magneli Phase
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