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Principle of Water Electrolysis and Recent Progress of ...

Jun 17, 2021· Principle of Water Electrolysis and Recent Progress of Cobalt, Nickel, and Iron-based Oxides for Oxygen Evolution Reaction Mingquan Yu, Max-Planck-Institut für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung, Heterogeneous Catalysis and Sustainable Energy, GERMANY

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Laser‐Ablation‐Produced Cobalt Nickel Phosphate with High ...

Dec 15, 2019· Laser-Ablation-Produced Cobalt Nickel Phosphate with High-Valence Nickel Ions as an Active Catalyst for the Oxygen Evolution Reaction Xuechun Sun, Institute of New-Energy Materials, Key Laboratory of Advanced Ceramics, and Machining Technology of Ministry of Education, School of Materials Science and Engineering, Tianjin University, Tianjin ...

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Oxygen vacancies enriched nickel cobalt based nanoflower ...

The electrochemical energy storage mechanism of nickel cobalt-based metal oxides is as following: (1) Oxygen-vacancy (Ov) can induce changes in the electronic microstructure of nickel cobalt-based oxides enabling electron and ion-transport processes; (2) The presence of Ov at the electrode/electrolyte interface facilitates the phase transition ...

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The Electrocatalytic Evolution of Oxygen and Hydrogen by ...

The Electrocatalytic Evolution of Oxygen and Hydrogen by Cobalt and Nickel Compounds In order to meet the ever-increasing demand for energy, a worldwide transition away from fossil fuels to renewable solar–fuels is required. However, the intermittency of local insolation mandates a cost-effective and efficient storage scheme.

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Cobalt-Nickel Wrapped Hydroxyapatite Carbon Nanotubes as …

Jan 07, 2020· Introducing an inexpensive non-noble metal electrocatalyst is an ongoing challenge in oxygen evolution reaction (OER). Here, a bimetallic cobalt-nickel-based catalyst is introduced by metal loading over hydroxyapatite multiwalled carbon nanotube substrate (Co-Ni/HA-MWCNTs). The proposed catalyst is promising and inexpensive and could be favorably applied in water electrolyzing systems. …

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Nickel and cobalt phosphides as effective catalysts for ...

Apr 24, 2015· The catalytic activity of nickel and cobalt phosphides, with a metal loading of 5 wt.%, supported on silica was investigated in the hydrodeoxygenation reaction (HDO) of dibenzofuran (DBF) as a model oxygenated compound at different contact times, H 2 pressures and H 2 /DBF molar ratios.

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Nickel–cobalt oxalate as an efficient non-precious ...

Nickel–cobalt oxalate as an efficient non-precious electrocatalyst for an improved alkaline oxygen evolution reaction† Sourav Ghosh, ‡ * ab Rajkumar Jana, ‡ c Sagar Ganguli, a Harish Reddy Inta, a Gouri Tudu, a Heramba V. S. R. M. Koppisetti, a Ayan Datta * c and Venkataramanan Mahalingam * a

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Oxygen, Nitrogen, and Hydrogen in Iron, Steel, Nickel-Base ...

The determination of the amount of oxygen, nitrogen, and hydrogen in iron, steel, nickel-, and cobalt-base alloys represents some of the most important quality metrics for these materials. Oxygen is used to create steel from pig iron by removing excess carbon. Oxygen content must be controlled to limit the amount of carbon monoxide that can be

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Structural design of cobalt phosphate on nickel for ...

May 03, 2021· Herein, metal phosphonate precursors with controllable morphologies were synthesized in situ on the surface of nickel with different solvents, and could be easily converted into carbon- and nitrogen-doped cobalt phosphate through a calcination method. The OER catalytic performance of the final products was studied in detail.

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Nickel cobalt oxide hollow nanosponges as advanced ...

A class of novel nickel cobalt oxide hollow nanosponges were synthesized through a sodium borohydride reduction strategy. Due to their porous and hollow nanostructures, and synergetic effects between their components, the optimized nickel cobalt oxide nanosponges exhibited excellent catalytic activity towards oxygen evolution reaction.

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Chemistry of Nickel - Chemistry LibreTexts

Aug 21, 2020· Nickel oxide is a powdery green solid that becomes yellow on heating. It is difficult to prepare this compound by simply heating nickel in oxygen and it is more conveniently obtained by heating nickel hydroxide, carbonate or nitrate. Nickel oxide …

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Effects of transition metals on the expression of the ...

Under hyperbaric oxygen, cobalt induction of erythropoietin mRNA was modestly suppressed while nickel induction was markedly enhanced. These observations support the proposal that the oxygen sensor is a heme protein in which cobalt and nickel can substitute for iron in the porphyrin ring.

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Facile synthesis of nickel cobalt selenide hollow ...

Nov 08, 2019· oxygen reduction reaction (ORR), which are the core of Zn-air batteries [10–13]. Up to now, the most efficient ... agent, nickel/cobalt nitrate as cationic precursors and selenium powder as ionic precursor. Benefiting from the larger specific surface area and smaller electrochemical

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Structure and Dynamics of Photogenerated Triplet Radical ...

Jun 28, 2012· Efficient Electrocatalytic Oxygen Evolution on Amorphous Nickel–Cobalt Binary Oxide Nanoporous Layers; Co Nanoparticles Decorated with Nitrogen Doped Carbon Nanotubes for Boosting Photocatalytic Water Splitting; Dependence of the Absorption and Optical Surface Plasmon Scattering of MoS2 Nanoparticles on Aspect Ratio, Size, and Media

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Direct Observation of Reductive Coupling Mechanism between ...

May 12, 2021· The oxygen redox activity is found to be directly influenced by the type of transition metal present in the Li-rich oxide. For example, Li 1.2 Ni 0.2 Mn 0.6 O 2 containing the 3d transition metal Ni was found to exhibit oxygen redox activity at higher voltages, which was found to be absent in its Ru (4d transition metal) analog, Li 1.2 Ni 0.2 ...

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Nickel–cobalt oxalate as an efficient non-precious ...

Nickel–cobalt oxalate as an efficient non-precious electrocatalyst for an improved alkaline oxygen evolution reaction† Sourav Ghosh, ‡*ab Rajkumar Jana,‡c Sagar Ganguli, a Harish Reddy Inta,a Gouri Tudu, a Heramba V. S. R. M. Koppisetti,a Ayan Datta *c and Venkataramanan Mahalingam *a The quest for developing next-generation non-precious electrocatalysts has risen in recent times.

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THE DEPENDENCE ON OXYGEN FUGACITY NICKEL AND …

THE DEPENDENCE ON OXYGEN FUGACITY OF NICKEL AND COBALT PARTITIONING BETWEEN OLIVINE AND SILICATE MELT by Deborah A. Zervas B.S Geology, Indiana University (1989) Submitted to the Department of Earth, Atmospheric, and Planetary Science In Partial Fulfillment of the Requirements for the Degree of MASTER OF SCIENCE in Geology at the

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Iron-Induced Activation of Ordered Mesoporous Nickel ...

Iron-Induced Activation of Ordered Mesoporous Nickel Cobalt Oxide Electrocatalyst for the Oxygen Evolution Reaction . Xiaohui Deng, Secil Öztürk, Claudia Weidenthaler, Harun Tüysüz* Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany * E-mail: [email protected]

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NICKEL–COBALT oxide-coated electrodes: influence of the ...

Jan 01, 2001· The oxygen evolution reaction (OER) was investigated at 60°C in 15 wt% NaOH solution on NiCo 2 O 4 electrodes. Nickel–cobalt oxides were obtained by different preparation techniques and they were applied to chemically pickled nickel plates. Fresh and artificially aged electrodes were subjected to electrochemical tests.

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Nickel cobalt oxide hollow nanosponges as advanced ...

Nickel cobalt oxide hollow nanosponges as advanced electrocatalysts for the oxygen evolution reaction† Chengzhou Zhu,a Dan Wen,a Susanne Leubner,a Martin Oschatz,b Wei Liu,a Matthias Holzschuh,a Frank Simon,c Stefan Kaskelb and Alexander Eychmu¨ller*a A class of novel nickel cobalt oxide hollow nanosponges were

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Nickel–cobalt oxalate as an efficient non-precious ...

Microstructural analysis revealed a mesoporous block-like architecture for nickel–cobalt oxalate (Ni 2.5 Co 5 C 2 O 4). The required overpotential of Ni 2.5 Co 5 C 2 O 4 for the alkaline oxygen evolution reaction (OER) was found to be 330 mV for achieving 10 mA cm geo −2, which is superior to that of NiC 2 O 4, CoC 2 O 4, NiCo 2 O 4 and the ...

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The Effect of Heteroatom Doping on Nickel Cobalt Oxide ...

Jul 30, 2020· The synthesis of nickel cobalt oxide materials and their electrocatalytic performance toward the oxygen reduction and evolution reactions are reported. Nickel cobalt oxides were synthesized in a sol-gel process with different precursors, namely nitrate, sulfate, and chloride.

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Principles of Water Electrolysis and Recent Progress in ...

Jun 17, 2021· Principles of Water Electrolysis and Recent Progress in Cobalt-, Nickel-, and Iron-Based Oxides for the Oxygen Evolution Reaction Dr. Mingquan Yu, Department of Heterogeneous Catalysis, Max-Planck-Institute für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany

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Ternary mesoporous cobalt-iron-nickel oxide efficiently ...

Apr 02, 2019· Ternary mesoporous cobalt-iron-nickel oxide efficiently catalyzing oxygen/hydrogen evolution reactions and overall water splitting ... Han, L., Guo, L., Dong, C. et al. Ternary mesoporous cobalt-iron-nickel oxide efficiently catalyzing oxygen/hydrogen evolution reactions and overall water splitting. Nano Res. 12, 2281–2287 (2019). https ...

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Materials | Free Full-Text | Spinel of Nickel-Cobalt Oxide ...

Nickel-cobalt oxide has the F d 3 m ¯ space group. In this compound, nickel is located on the octahedral sites (16d) and cobalt is in the octahedral and tetrahedral sites (16d, and 8a, respectively). It is claimed that the pairs of their redox cations (Ni 3+ /Ni 2+, Co 3+ /Co 2+) are distributed in the oxidation state of this spinel structure .

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Highly efficient overall water splitting over a porous ...

The development of highly efficient electrocatalysts for simultaneous evolution of hydrogen and oxygen is a vital concern in water splitting. In this study, a novel catalyst derived from a porous interconnected network of nickel cobalt oxysulfide interfacial assembled [email protected] 2 S nanowires was rationally designed. It was recognized that the formation of multi-integrated active centers and a ...

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ASTM E1019 - 18 Standard Test Methods for Determination of ...

E1019-18 Standard Test Methods for Determination of Carbon, Sulfur, Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt Alloys by Various Combustion and Inert Gas Fusion Techniques sulfur content~ carbon content~ hydrogen content~ nitrogen content~ oxygen content~ inert …

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Delta Centrifugal | LinkedIn

Delta Centrifugal | 123 followers on LinkedIn. Delta Centrifugal Corporation produces centrifugally cast products in iron, nickel, cobalt, and copper based alloys. We produce over 200 grades of ...

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Oxygen discharge on nickel and cobalt anodes in 30 w/o KOH ...

Abstract The oxygen evolution reaction (OER) has been investigated on polished pure nickel and cobalt anodes in 30 w/o KOH at 70°C. The anodes were preanodized at an anodic current density i a of 5 or 0.44 A cm −2 for 20 min before the kinetic parameters of the OER were determined. The electrocatalytic activity decreases significantly in the case of cobalt anodes but remains practically ...

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Nickel–Cobalt Hydroxides with Tunable Thin-Layer ...

May 12, 2021· When the content of urea is reduced from 0.03 to 0.0075 g under a fixed precursor materials mass ratio of nickel (0.06 g) to cobalt (0.02 g) of 3:1, the prepared sample NiCo-LDH-1 exhibits the thickness of 1.62 nm, and the clear thin-layer nanosheet structures and a large number of surface pores are formed, which is beneficial to the ...

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Synthesis and Electrochemical Study of Mesoporous Nickel ...

Apr 23, 2019· Synthesis and Electrochemical Study of Mesoporous Nickel-Cobalt Oxides for Efficient Oxygen Reduction. Boopathi Sidhureddy. Boopathi Sidhureddy. Electrochemical Technology Center, Department of Chemistry, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada.

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Corrosion Alloys Guide - haynesintl.com

characteristics of nickel and cobalt. Like nickel, cobalt is inherently resistant to corrosion, and can accommodate high levels of beneficial elements. However, cobalt exhibits two atomic forms: 1. A low temperature hexagonal close packed (HCP) form. 2. A high temperature face‐centered cubic (FCC) form.

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Lithium cobalt oxide - Wikipedia

Lithium cobalt oxide, sometimes called lithium cobaltate or lithium cobaltite, is a chemical compound with formula LiCoO 2.The cobalt atoms are formally in the +3 oxidation state, hence the IUPAC name lithium cobalt(III) oxide.. Lithium cobalt oxide is a dark blue or bluish-gray crystalline solid, and is commonly used in the positive electrodes of lithium-ion batteries

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An oxygen electrode based on nickel/cobalt spinel - NASA/ADS

It has been demonstrated that nickel/cobalt spinel, NiCo2O4, can be prepared simply and inexpensively by the thermal decomposition of cobalt nitrate on sintered nickel plaque. Electrodes suitable for use in metal/air batteries and fuel cells have been developed which will reduce oxygen from the air at room temperature and a current density of 50mA/sq cm for more than a year.

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The Ni−O (Nickel-Oxygen) system | SpringerLink

81Jac: E. Jacobson and E. Rosen, "Thermodynamic Studies of High Temperature Equilibriums. 25. Solid State emf Studies of the Systems Iron-Ferrous Oxide, Nickel-Nickelous Oxide, and Cobalt-Cobaltous Oxide in the Temperature Range 1000–1600 K", Scand. J. Metall., 10, 39–43 (1981). (Thermo; Experimental) Google Scholar.

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Resolving atomic-scale phase transformation and oxygen ...

oxygen loss mechanism in ultrahigh-nickel layered cathodes for cobalt-free lithium-ion batteries Chunyang Wang, 1,6Lili Han, Rui Zhang, 1,6 Hao Cheng, Linqin Mu,2 Kim Kisslinger,3 Peichao Zou, Yang Ren,4 Penghui Cao,5 Feng Lin,2 and Huolin L. Xin1,7 * SUMMARY Doped LiNiO 2 has recently become one of the most promising cath-

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