A chemical redox reaction to generate rock salt-type materials: the case of Na3V2O5

2018 ◽  
Vol 47 (9) ◽  
pp. 3112-3118 ◽  
Author(s):  
E. Adamczyk ◽  
E. Anger ◽  
M. Freire ◽  
V. Pralong
Keyword(s):  
Rock Salt ◽  
Redox Reaction ◽  
Redox Reactions

Chemical redox reactions are extremely efficient to prepare fully reduced or oxidized phases that are formed during the topotactic insertion/extraction of alkaline ions. Moreover, these phases show new ordered or disordered Rock Salt type structures.

Cr(vi) removal by combined redox reactions and adsorption using pectin-stabilized nanoscale zero-valent iron for simulated chromium contaminated water

RSC Advances ◽  
2015 ◽  
Vol 5 (80) ◽  
pp. 65068-65073 ◽  
Author(s):  
Dan Chen ◽  
Kai Yang ◽  
Hongyu Wang ◽  
Jun Zhou ◽  
Huining Zhang
Keyword(s):  
Redox Reaction ◽  
Redox Reactions ◽  
Zero Valent Iron ◽  
Contaminated Water ◽  
Nanoscale Zero Valent Iron

Pectin-stabilized nanoscale zero-valent iron was used to removal Cr(vi) and the main mechanisms were redox reaction and adsorption.

scholarly journals Studi Perbandingan Pengajaran Reaksi Reduksi Oksidasi Antara Cara Perubahan Bilangan Oksidasi dengan Cara Setengah Reaksi terhadap Hasil Belajar Siswa Kelas XII IPA 1 dan XII IPA 2

2021 ◽  
Vol 21 (1) ◽  
pp. 353
Author(s):  
Fauziah Fauziah
Keyword(s):  
Redox Reaction ◽  
Redox Reactions ◽  
Oxidation Number ◽  
Reduction Reactions ◽  
Reaction Method ◽  
Oxidation Reduction ◽  
Reaction Coefficient ◽  
Level Of Significance ◽  
Student Grades ◽  
Train Of Thought

Oxidation-Reduction Reactions (Redox) are one of the hardest reactions to equalize, this means that it is hard to determine the suitable Reaction Coefficient. An easier and more logical train of thought is to remember that a Reduction and an Oxidation reaction happens simultaneously. A Redox Reaction has two methods in order to equalize, that which is by using the “Change in Oxidation Number” method or the “Half-Reaction (Ion-Electron)” method. The students’ skills in completing a Redox Reaction can be observed in the grades that they have achieved. This observation is intended to find out if there is a difference in students’ grades if you were to teach them about the equalization of Redox Reactions using either of these two methods (the “Change in Oxidation Number” method and the “Half-Reaction” method).  The population in this observation consists of the students of Class XII IPA 1 and Class XII IPA 2 of SMAS PERTIWI Jambi that are studying Oxidation-Reduction Reactions. Sample members consist of the students of Class XII IPA 1 and the students of Class XII IPA 3 of SMAS Pertiwi Jambi. The measuring instrument used is a test that has fulfilled standards. Normality tests and Homogeneity tests of the sample in question has been done before the Hypothetical test was implemented.  The average grades of students using the “Change in Oxidation Number” method and the “Half-Reaction” method is 11.75 and 10.8 respectively. The T-value of calculations is approximately 1.81 while the T-value of tables is approximately 2.00. With the Level of Significance being 0.05.  From the data provided above, it can be concluded that there is no difference in student grades whether the “Change in Oxidation Numbers” method or the “Half-Reaction” method is used to equalize Redox Reactions in applicative aspects.

A review of non-precious metal single atom confined nanomaterials in different structural dimensions (1D–3D) as highly active oxygen redox reaction electrocatalysts

2020 ◽  
Vol 8 (5) ◽  
pp. 2222-2245 ◽  
Author(s):  
Jin Liu ◽  
Hao Zhang ◽  
Ming Qiu ◽  
Zehua Peng ◽  
Michael K. H. Leung ◽  
...  
Keyword(s):  
Redox Reaction ◽  
Precious Metal ◽  
Redox Reactions ◽  
Active Oxygen ◽  
Single Atom ◽  
Highly Active ◽  
Structural Dimensions

Different dimensional supports for non-precious-metal single-atom catalysts play significant roles in their fabrication and electrocatalytic activities for oxygen redox reactions.

scholarly journals One-electron oxidation of ergothioneine and analogues investigated by pulse radiolysis: redox reaction involving ergothioneine and vitamin C

1996 ◽  
Vol 315 (2) ◽  
pp. 625-629 ◽  
Author(s):  
Klaus-Dieter ASMUS ◽  
René V. BENSASSON ◽  
Jean-Luc BERNIER ◽  
Raymond HOUSSIN ◽  
Edward J. LAND
Keyword(s):  
Oxidative Stress ◽  
Vitamin E ◽  
Vitamin C ◽  
Redox Reaction ◽  
Redox Reactions ◽  
Pulse Radiolysis ◽  
Antioxidant Properties ◽  
Transient Species ◽  
Rapid Reduction ◽  
The One

Redox reactions of endogenous and exogenous sulphur-containing compounds are involved in protection against oxidative damage arising from the incidence and/or treatment of many diseases, including cancer. We have investigated, via pulse radiolysis, the one-electron oxidation of ergothioneine, a molecule with antioxidant properties which is detected at millimolar concentrations in certain tissues and fluids subject to oxidative stress, including erythrocytes and plasma. The spectrum of the transient species, assigned to the product of one-electron oxidation, observed after reaction of ergothioneine with the oxidizing radicals OH•, N3• and CCl3O2• has a maximum absorption at 520 nm and is very similar to that obtained by oxidation of analogous molecules such as 2-mercaptoimidazole, 1-methyl-2-mercaptoimidazole, S-methyl- and S,N-dimethyl-ergothioneine. In the presence of vitamin C, the oxidized form of ergothioneine is repaired by a rapid reduction (k = 6.3×108 M-1·s-1) producing ascorbyl radicals. This co-operative interaction between ergothionine and ascorbate, similar to that previously observed between vitamin E and ascorbate, may contribute to essential biological redox protection.

Enabling superior hybrid capacitive deionization performance in NASICON-structured Na3MnTi(PO4)3/C by incorporating a two-species redox reaction

2021 ◽  
Vol 9 (11) ◽  
pp. 6898-6904
Author(s):  
Shiyong Wang ◽  
Gang Wang ◽  
Chi He ◽  
Ningbo Gao ◽  
Bing Lu ◽  
...  
Keyword(s):  
Redox Reaction ◽  
Redox Reactions ◽  
Capacitive Deionization ◽  
First Time

Na3MnTi(PO4)3/C with two-species redox reactions was evaluated as an HCDI electrode for the first time that showed a high CDI performance.

scholarly journals Synergistic Catalysis of SnO2/Reduced Graphene Oxide for VO2+/VO2+ and V2+/V3+ Redox Reactions

Molecules ◽  
2021 ◽  
Vol 26 (16) ◽  
pp. 5085
Author(s):  
Yongguang Liu ◽  
Yingqiao Jiang ◽  
Yanrong Lv ◽  
Zhangxing He ◽  
Lei Dai ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Metal Oxide ◽  
Reduced Graphene Oxide ◽  
Surface Area ◽  
Redox Reaction ◽  
Redox Reactions ◽  
Transport Processes ◽  
Electrochemical Kinetics ◽  
Reduced Graphene ◽  
Vanadium Redox

In spite of their low cost, high activity, and diversity, metal oxide catalysts have not been widely applied in vanadium redox reactions due to their poor conductivity and low surface area. Herein, SnO2/reduced graphene oxide (SnO2/rGO) composite was prepared by a sol–gel method followed by high-temperature carbonization. SnO2/rGO shows better electrochemical catalysis for both redox reactions of VO2+/VO2+ and V2+/V3+ couples as compared to SnO2 and graphene oxide. This is attributed to the fact that reduced graphene oxide is employed as carbon support featuring excellent conductivity and a large surface area, which offers fast electron transfer and a large reaction place towards vanadium redox reaction. Moreover, SnO2 has excellent electrochemical activity and wettability, which also boost the electrochemical kinetics of redox reaction. In brief, the electrochemical properties for vanadium redox reactions are boosted in terms of diffusion, charge transfer, and electron transport processes systematically. Next, SnO2/rGO can increase the energy storage performance of cells, including higher discharge electrolyte utilization and lower electrochemical polarization. At 150 mA cm−2, the energy efficiency of a modified cell is 69.8%, which is increased by 5.7% compared with a pristine one. This work provides a promising method to develop composite catalysts of carbon materials and metal oxide for vanadium redox reactions.

PolyTCAQ in organic batteries: enhanced capacity at constant cell potential using two-electron-redox-reactions

2014 ◽  
Vol 2 (24) ◽  
pp. 8999-9001 ◽  
Author(s):  
Bernhard Häupler ◽  
René Burges ◽  
Tobias Janoschka ◽  
Thomas Jähnert ◽  
Andreas Wild ◽  
...  
Keyword(s):  
Redox Reaction ◽  
Redox Reactions ◽  
Electrode Materials ◽  
Cell Potential ◽  
Constant Cell ◽  
Organic Batteries ◽  
The One ◽  
Charge Discharge

The application of polymers bearing tetracyano-9,10-anthraquinonedimethane (TCAQ) units as electrode materials in organic batteries enables one narrow charge discharge plateau due to the one two-electron-redox-reaction of the TCAQ core.

Anionic redox reactions and structural degradation in a cation-disordered rock-salt Li1.2Ti0.4Mn0.4O2 cathode material revealed by solid-state NMR and EPR

2020 ◽  
Vol 8 (32) ◽  
pp. 16515-16526 ◽  
Author(s):  
Fushan Geng ◽  
Bei Hu ◽  
Chao Li ◽  
Chong Zhao ◽  
Olivier Lafon ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Solid State ◽  
Rock Salt ◽  
Epr Spectroscopy ◽  
Solid State Nmr ◽  
Redox Reactions ◽  
Degradation Mechanism ◽  
Structural Degradation ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

The cation-disordered rock-salt Li1.2Ti0.4Mn0.4O2 is studied by solid-state NMR and electron paramagnetic resonance (EPR) spectroscopy during the first cycle. The anionic redox and structural degradation mechanism are discussed.

Influence of Pb element on the catalytic properties of {P4Mo6}-polyoxometalate for redox reactions

2018 ◽  
Vol 47 (10) ◽  
pp. 3356-3365 ◽  
Author(s):  
Zhangang Han ◽  
Xing Xin ◽  
Ran Zheng ◽  
Haitao Yu
Keyword(s):  
Electron Transfer ◽  
Redox Reaction ◽  
Redox Reactions ◽  
Catalytic Properties ◽  
Mild Temperature

{PbM(P4Mo6O31)2}-based hybrids (M = Mn/Co/Ni/Cd) as electron transfer catalysts are active toward the redox reaction of [Fe(CN)6]3−–S2O32− under a mild temperature.

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