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3 edition of Oxygen electrode bifunctional electrocatalyst NiCoO spinel found in the catalog.

Oxygen electrode bifunctional electrocatalyst NiCoO spinel

Oxygen electrode bifunctional electrocatalyst NiCoO spinel

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Published by National Aeronautics and Space Administration, For sale by the National Technical Information Service in [Washington, DC], [Springfield, Va .
Written in English

    Subjects:
  • Cobalt-nickel alloys.,
  • Electrodes.

  • Edition Notes

    StatementWilliam L. Fielder and Joseph Singer.
    SeriesNASA technical memorandum -- 100947.
    ContributionsSinger, Joseph, 1915-, United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15294508M

    electrolyzers. This presentation will presents a systematic study on oxygen electrocatalysis (ORR and OER) of transition metal spinel oxides.[1] Starting with a model system of Mn-Co spinel, the presentation will introduce the correlation of oxygen catalytic activities of .   For the purpose of blood analyses and industrial tests, it is often necessary to measure the concentration of specific ions. At present, the relevant devices are large and cannot be produced at. OXYGEN GAS O 2 OXYGEN SERVOTOUGH DFE HAZARDOUS AREA RELIABLE RESULTS IN A TESTING RANGE OF ENVIRONMENTS The DFE allows for reliable oxygen measurement in a wide variety of environments, including outdoors and in explosive environments with a NEMA 7 remote sensor enclosure. Using the revolutionary non-depleting E-Sensor, the DFE.


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Oxygen electrode bifunctional electrocatalyst NiCoO spinel Download PDF EPUB FB2

OXYGEN ELECTRODE BIFUNCTIONAL ELECTROCATALYST NiCo SPINEL Will_am L. Fielder and Joseph Singer National Aeronautics and Space Administration Lewis Research Center Cleveland, Ohio SUMMARY A significant increase in energy density may be possible if a two-unit alkaline regenerative H2-O2 fuel cell is replaced with a single-unit system.

A significant increase in energy density may be possible if a two-unit alkaline regenerative H2-O2 fuel cell is replaced with a single-unit system that uses. Therefore, a bifunctional air/O 2 electrocatalyst having gas diffusivity in conjunction with hydrophilicity to an electrolyte is needed.

Bifunctional oxygen catalysts (BOC) that have been reported to date include several noble metals and their oxides such as Pt, Ir, Ru, IrO 2, and RuO 2 in alkaline and acid medium. Here, Platinum acts as Cited by: Perovskites including L a N i O 3, La 0. 6 C a 0 26 and so are Ru-and Ir-based pyrochlores.

27 In this work, we have synthesized and tested an ORR−OER bifunctional electrocatalyst with a. H.Y. Jung, S. Park, B.N. PopovElectrochemical studies of an unsupported PtIr electrocatalyst as a bifunctional oxygen electrode in a unitized regenerative fuel cell Cited by: Electrocatalysts and appropriate electrode designs have been studied with respect to the development of Bifunctional Air/Oxygen Electrode (BAE).

Three groups of catalysts have been prepared: (i) Cu x Co 3−x O 4 ; (ii) thin films of Co-Ni-Te-O and Co-Te-O and (iii) Co x O v /ZrO 2 by: 1. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Many spinel cobaltite oxides meet the requirement for a wide range of electrochemical reactions.

These materials have largely been investigated as electrocatalysts for the oxygen evolution reaction (OER) or oxygen reduction reaction (ORR). The objective of this article is to summarize the studies available in the. Int. Electrochem. Sci., Vol. 5, with the performance of Co 3O4 and Co- based spinel oxides as the oxygen electrodes in the light of the earlier published work.

The results will also be. An electrocatalyst is a catalyst that participates in electrochemical st materials modify and increase the rate of chemical reactions without being consumed in the process. Electrocatalysts are a specific form of catalysts that function at electrode surfaces or may be the electrode surface itself.

An electrocatalyst can Oxygen electrode bifunctional electrocatalyst NiCoO spinel book heterogeneous such as a platinum surface or. increases the overpotential for the oxygen electrode reactions. Oxygen is evolved readily from lithium peroxide, but the oxidation of lithium oxide is irreversible and requires an electrocatalyst The mechanism of oxygen reduction and oxygen evolution in non-aqueous electrolytes is a topic of current research.

Electrocatalyst Materials for. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

slide 1: ARTICLE Received 24 Oct | Accepted 25 Apr | Published 27 May Spinel-type lithium cobalt oxide as a bifunctional electrocatalyst for the oxygen evolution and oxygen reduction reactions Thandavarayan Maiyalagan 1 Karalee A.

Jarvis 1 Soosairaj Therese 1 Paulo J. Ferreira 1 Arumugam Manthiram 1 Development of efficient affordable electrocatalysts for the.

How to cite this article: Maiyalagan, T. et al. Spinel-type lithium cobalt oxide as a bifunctional electrocatalyst for the oxygen evolution and oxygen reduction reactions.

Nat. Cited by: Electrochemical Synthesis of Spinel Type ZnCo2O4 Electrodes for Use as Oxygen Evolution Reaction CatalystsCited by: Oxygen electrode bifunctional electrocatalyst NiCoO spinel book electrocatalytic performance of a spinel for the oxygen reduction reaction (ORR) can be significantly promoted by reversing its crystalline structure from the normal to the inverse.

As the spinel structure reversed, the activation and cleavage of O−O bonds are accelerated owing to a dissimilarity effect of the distinct metal atoms co.

Spinel-type lithium cobalt oxide as a bifunctional electrocatalyst for the oxygen evolution and oxygen reduction reactions Thandavarayan Maiyalagan1, Karalee A. Jarvis1, Soosairaj Therese1, Paulo J. Ferreira1 & Arumugam Manthiram1 Development of efficient, affordable electrocatalysts for the oxygen evolution reaction andCited by:   In this article, we report a facile precursor pyrolysis method to prepare porous spinel-type cobalt manganese oxides (Co x Mn3-x O4) with controllable morphologies and crystalline structures.

The capping agent in the reaction was found to be crucial on the formation of the porous spinel cobalt manganese oxides from cubic Co2MnO4 nanorods to tetragonal Co2Mn4 microspheres and Cited by:   Although LT-LiCoO2 exhibits poor activity for the oxygen reduction reaction, the chemically delithiated LT-Li1 À xCoO2 samples exhibit a combination of high oxygen reduction reaction and oxygen evolution reaction activities, making the spinel-type LT- Li0,5CoO2 a potential bifunctional electrocatalyst for rechargeable metal-air batteries.

Aiming to improve the electrochemical catalytic performance of the spinel NiCo2O4 as water oxidation catalyst, solvothermal method was employed in this work to fabricate NiCo2O4 directly on conductive substrate FTO as integrated anode. By simply altering the solvent in the precursor solution, NiCo2O4 with different morphology was obtained.

The electrocatalytic water oxidation behavior of both Cited by: Spinel Oxides and Heteroatom-doped Carbon Nano-composite as Bi-functional Oxygen Electrocatalyst for Rechargeable Zinc-Air Battery by Moon Gyu Park A thesis presented to the University of Waterloo in fulfillment of the thesis requirement for the degree of Master of Applied Science in Chemical Engineering Waterloo, Ontario, Canada, The slow oxygen reactions create large overpotentials during both discharge and charge processes, which significantly decrease energy efficiency of zinc-air battery.

Accordingly, the use of electrocatalysts in air electrode has been highly required to facilitate the reactions and even propel the zinc-air batteries to practical energy : Moon Gyu Park.

Spinel-type lithium cobalt oxide as a bifunctional electrocatalyst for the oxygen evolution and oxygen reduction reactions. Maiyalagan T(1), Jarvis KA(1), Therese S(1), Ferreira PJ(1), Manthiram A(1). Author information: (1)Materials Science and Engineering Program, The University of Texas at Austin, Austin, Texasby: Fabrication of three-dimensional ordered macroporous spinel CoFe 2 O 4 as efficient bifunctional catalysts for the positive electrode of lithium–oxygen batteries J.

Kim, Y. Noh, Y. Kim, S. Lee and W. Kim, Nanoscale,9, • C. Electrode Performance Technical Targets Table 1. Progress Towards Meeting DOE Electrocatalyst Technical Targets Characteristic Units Targets This Project a b PGM Total Content (Electrocatalyst) g/kW (rated) PGM Total Loading (Electrocatalyst) mg PGM/cm2 electrode area Total.

Ni:Fe:Al mixed oxides were identified as highly active water oxidation electrocatalysts. A systematic investigation of these materials has led to the characterization of a well-defined NiFeAlO4 inverse spinel catalyst.

Electrochemical characterization of NiFeAlO4 shows activity exceeding previously reportedCited by: Spinel cobalt oxide (Co3O4) is an earth-abundant element which has been extensively studied as effective OER catalyst due to its competitive activity compared to the noble catalyst.

To further improve the catalytic activity, substituting Co3O4 with Ni has been proposed as a promising approach to enhance the electrochemical activity toward : Hsin-Yi Wang. This paper reports a novel bifunctional oxygen electrode with remarkable stability, able to perform at current densities up to 1, mA cm-2 and withstand 3, cycles continuously.

The electrode is catalysed by a mixture of Pd/C and mixed nickel-iron hexocyanoferrate, which have high activities towards the ORR and OER reactions, by: Remarkable hydrogen evolution reaction (HER) or superior oxygen evolution reaction (OER) catalyst has been applied in water splitting, however, utilizing a bifunctional catalyst for simultaneously generating H2 and O2 is still a challenging issue, which is crucial for improving the overall efficiency of water electrolysis.

Herein, inspired by the superiority of carbon conductivity, the Cited by:   Spinel Mn-Co oxide in N-doped carbon nanotubes as a bifunctional electrocatalyst synthesized by oxidative cutting.

Zhao A(1), Masa J, Xia W, Maljusch A, Willinger MG, Clavel G, Xie K, Schlögl R, Schuhmann W, Muhler M. Author information: (1)Laboratory of Industrial Chemistry, Ruhr-University Bochum, Bochum, by: Organometallic complexes with metal–nitrogen/carbon (M–N/C) coordination are the most important alternatives to precious metal catalysts for oxygen reduction and evolution reactions (ORR and OER) in energy conversion devices.

Here, we designed and developed a range of molecule-level graphitic carbon nitride (g-C3N4) coordinated transition metals (M–C3N4) as a new generation of M–N/C Cited by:   The mechanism of O2 reduction at the spinels, Co3O4 and NiCo2O4, in KOH electrolyte is probed using voltammetry at rotating disc and rotating ring-disc electrodes by examination of the rotation rate dependent limiting currents.

The analysis shows that the products and mechanisms at the two spinels are quite different. At the cobalt spinel, a substantial amount of the 2e.

reduction product Cited by: 7. (t95~5s at °C), good reproducibility (±% O2) and long term stability at different oxygen concentration. Index terms: oxygen concentration measurements, potentiometric gas sensor, oxide electrode, perovskite structure, rare earth manganite electrode, combustion application.

INTRODUCTION Electrochemical oxygen sensors based on zirconia solid electrolytes widely used File Size: 1MB. First-Principles Studies on the Structural Stability of Spinel ZnCo 2 O 4 as an Electrode Material for Lithium-ion Batteries.

Sci. Rep. 6, ; doi: /srep ().Cited by: 8. electrical conductivity of LiNiVO4 as a function of temperature, type of dopants, and dopant ratio.

The dopant mole ratios of LiNiVO4 to Ln (where Ln=La, Gd, or Yb), used in the reactions of LiOHH2O, NH4VO3, Co(NO3)26H2O and Ln2O3, ranged from 1 to 1 [24]. Padhi et al. [25] have reported that LiMnVO4 exists in two forms: ambient-pressure LiV[Mn]O4 and high.

A FUNDAMENTAL STUDY OF SPINEL Co 3 O 4 ELECTRO-CATALYST DURINF ELECTROCHEMICAL OXYGEN EVOLUTION REACTION WANG HSIN-YI School of Chemical and Biomedical Engineering A thesis submitted to the Nanyang Technological University in partial fulfilment of the requirement for the degree of Doctor of Philosophy Abstract.

This article gives a historical account of the development of spinel electrodes for rechargeable lithium batteries. Research in the late s and early s on high-temperature Li/Fe 3 O 4 cells led to the evaluation of lithium spinels Li[B 2]X 4 at room temperature (B = metal cation). This work highlighted the importance of the [B 2]X 4 spinel framework as a host electrode.

RT in M KCl solution, pH = using a double-walled three electrode cell, where the working electrode was placed in concentric manner with respect the cylinder Pt-gauze counter-electrode. Oxygen was bubbled into the solution for 10 min prior to use, and maintained under an O 2 atmosphere for the duration of by: 3.

LI Xiao-gang, et al: Electrochemical behavior of diverse vanadium ions at modified graphite felt electrode 53 vanadium sulphuric solution in the potential range from − to V. The anodic peak (A) at approximately V is due to the oxidation of VO2+ to VO 2 +, whereas the cathodic peak (B) is corresponding to the reduction of VO2 + to VO2+.

electrode should be highly active for the conversion between oxygen anions and oxygen gas. CaMnO 3 d (CM) is a perovskite that can be readily reduced with the formation of Mn3+ giving rise to oxygen defective phases.

CM is examined here as the oxygen electrode for a RSOFC. CaMn Nb O 3 d (CMN) with Nb doping shows. Electrode/electrolyte Interface in the Li-O 2 Battery: Insight from Molecular Dynamics Study.

Artem Sergeev1, Alexander Chertovich1*, Daniil Itkis2, Anik Sen3, Axel Gross3 and Alexei Khokhlov1 1 Physics Department, Lomonosov Moscow State University, Moscow, Russia 2 Chemistry Department, Lomonosov Moscow State University, Moscow, Russia 3Institute of Theoretical Chemistry.

Formation of (1x1)-Pt{} Single Crystal Electrode Surface 88 Reagents 88 References 89 3 Chapter Three – Results 90 The Oxygen Reduction and Hydrogen Peroxide Oxidation/Reduction Reactions on Pt{hkl} Surfaces in Perchloric Acid 90File Size: 8MB.Capacity Fade Model for Spinel LiMn 2O 4 Electrode Yiling Dai, Long Cai, and Ralph E White∗,z Department of Chemical Engineering, University of South Carolina, Columbia, South CarolinaUSA A mathematical model for the capacity fade of a LiMn2O4 (LMO) electrode is developed in this paper by including the acid attack.Oxygen diffuses across the membrane into the electrolyte solution.

Disadvantage. False high readings with some oxygen electrode when halothane is present, because it is also reduced Low readings may result from presence of microorganisms on the electrode; Other points. Calibration is by zeroing in humidified nitrogen gas. Accuracy: +/- 2mmHg.