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Journal articles on the topic 'Cobalt oxide'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Mammadyarova, S. J. "SYNTHESIS AND CHARACTERIZATION OF COBALT OXIDE NANOSTRUCTURES. A BRIEF REVIEW." Azerbaijan Chemical Journal, no. 2 (June 29, 2021): 80–93. http://dx.doi.org/10.32737/0005-2531-2021-2-80-93.

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The newest achievement in the synthesis of cobalt oxide nanoparticles are considered. Cobalt oxide nanoparticles have attracted a great attention due to their uncommon properties and application in a supercapacitor, optoelectronic device, Li-ion battery gas sensor and electrochromic devices. Recently, nanostructured transition metal oxides with valuable properties have become a new class of materials for many technological fields. Cobalt oxide nanoparticles obtained from various precursors show different size distribution as well as different optical, electrical, magnetic, and electrochemical

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2

Kesavan, V., D. Dhar, Y. Koltypin, et al. "Nanostructured amorphous metals, alloys, and metal oxides as new catalysts for oxidation." Pure and Applied Chemistry 73, no. 1 (2001): 85–91. http://dx.doi.org/10.1351/pac200173010085.

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The oxidation of cyclohexane with molecular oxygen in the presence of isobutyraldehyde catalyzed by nanostructured iron and cobalt oxides and iron oxide supported on titania has been studied. Nanostructured cobalt oxide on MCM-41 is found to be efficient for catalytic aerobic epoxidation of olefins.

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3

Lendzion-Bieluń, Zofia, Roman Jędrzejewski, and Walerian Arabczyk. "The effect of aluminium oxide on the reduction of cobalt oxide and thermostabillity of cobalt and cobalt oxide." Open Chemistry 9, no. 5 (2011): 834–39. http://dx.doi.org/10.2478/s11532-011-0059-x.

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AbstractDuring precipitation and calcination at 200°C nanocrystalline Co3O4 was obtained with average size crystallites of 13 nm and a well developed specific surface area of 44 m2 g−1. A small addition of a structural promoter, e.g. Al2O3, increases the specific surface area of the cobalt oxide (54 m2 g−1) and decreases the average size of crystallites (7 nm). Al2O3 inhibits the reduction process of Co3O4 by hydrogen. Reduction of cobalt oxide with aluminium oxide addition runs by equilibrium state at all the respective temperatures. The apparent activation energy of the recrystallization pro

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4

Hacınecipoğlu, Ayşe V., Metin Gençten, Melih B. Arvas, and Yucel Sahin. "Preparation of Spinel Form Co₃O₄ and CoO₂ Thin Film at Low Temperature by Electrochemical Method as a Thin Film Oxide Layer." ECS Journal of Solid State Science and Technology 11, no. 8 (2022): 081014. http://dx.doi.org/10.1149/2162-8777/ac8a6f.

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In this work, thin films of cobalt oxides (CoO2, Co3O4) were prepared using the electrochemical method on the pencil graphite and indium tin oxide surfaces. The substrate effect in the production of both oxides has been studied in detail. While Co3O4 accumulates on the pencil graphite’s surface, CoO2 formation was observed on the indium tin oxide. The characterization of the cobalt oxides was carried out using the X-ray diffraction, Atomic force microscope, and Scanning electron microscope. In this context, the cobalt oxide crystal structure in the range of (−1.0 V)–(+1.9 V) was synthesized on

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5

Aitugan, A. N., S. K. Tanirbergenova, Ye Tileuberdi, and D. Tugelbayeva. "MODIFIED COBALT CATALYSTS FOR HYDROGENATION OF HYDROCARBONS." Горение и Плазмохимия 18, no. 3 (2020): 156–61. http://dx.doi.org/10.18321/cpc364.

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This work is devoted to the study of the influence of aluminum oxide content on the activity of cobalt catalysts in the reaction of selective hydrogenation of acetylene to ethylene. Cobalt catalysts modified with aluminum oxide having size between 50 to 500 nm were synthesized. Chemical contents and structure of carrier were investigated. The catalytic activity of 5 % Со /clay and 5% Co/SiAl catalysts at acetylene hydrogenation was studied in the temperature range 100-180 , with a ratio of 1:2 of acetylene and hydrogen. The ethylene yield is 87.8 % in modifying the cobalt catalyst with aluminu

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6

Koshtyal, Yury, Ilya Mitrofanov, Denis Nazarov, et al. "Atomic Layer Deposition of Ni-Co-O Thin-Film Electrodes for Solid-State LIBs and the Influence of Chemical Composition on Overcapacity." Nanomaterials 11, no. 4 (2021): 907. http://dx.doi.org/10.3390/nano11040907.

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Nanostructured metal oxides (MOs) demonstrate good electrochemical properties and are regarded as promising anode materials for high-performance lithium-ion batteries (LIBs). The capacity of nickel-cobalt oxides-based materials is among the highest for binary transition metals oxide (TMOs). In the present paper, we report the investigation of Ni-Co-O (NCO) thin films obtained by atomic layer deposition (ALD) using nickel and cobalt metallocenes in a combination with oxygen plasma. The formation of NCO films with different ratios of Ni and Co was provided by ALD cycles leading to the formation

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7

Eliseeva, E. A., S. L. Berezina, I. G. Gorichev, L. E. Slynko, and V. N. Goryacheva. "The Initial Surface Structure of Co3O4 as a Factor of Influence on Kinetic Features of the Dissolution of the Solid Phase." Herald of the Bauman Moscow State Technical University. Series Natural Sciences, no. 4 (91) (August 2020): 138–44. http://dx.doi.org/10.18698/1812-3368-2020-4-138-144.

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Due to the depletion of natural reserves of cobalt-containing ores, it is urgent to optimize the processes of cobalt replenishment, based on the leaching of its compounds, processing of industrial waste, regeneration of cobalt compounds from catalysts. The kinetic characteristics of the dissolution of metal oxides are influenced by the initial state of their surface structure, which requires the accumulation of experimental material and individual targeted studies. The paper presents the results of an experimental study of the surface structure of industrial Co3O4 cobalt oxide samples. The stu

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8

Chansaengsri, Kasidid, Korakot Onlaor, Thutiyaporn Thiwawong, and Benchapol Tunhoo. "Supercapacitive Properties of Cobalt Oxide Thin Films Prepared by Electrostatic Spray Deposition Technique at Different Substrate Temperature." Key Engineering Materials 675-676 (January 2016): 261–64. http://dx.doi.org/10.4028/www.scientific.net/kem.675-676.261.

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In this work, cobalt oxide thin films were prepared by electrostatic spray deposition (ESD) technique. The influence of the substrate temperatures on properties of film was investigated. Phase transformation of cobalt oxide thin films due to the effect of different substrate temperature was also observed. Cyclic voltammetry was used to measure the performance of cobalt oxide supercapacitor. At higher substrate temperature, the cobalt oxide thin films exhibit the high specific capacitance due to the effect of phase transformation in cobalt oxide films.

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9

Mirzaeian, Mojtaba, Nazym Akhanova, Maratbek Gabdullin, et al. "Improvement of the Pseudocapacitive Performance of Cobalt Oxide-Based Electrodes for Electrochemical Capacitors." Energies 13, no. 19 (2020): 5228. http://dx.doi.org/10.3390/en13195228.

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Cobalt oxide nanopowders are synthesized by the pyrolysis of aerosol particles of water solution of cobalt acetate. Cobalt nanopowder is obtained by subsequent reduction of obtained cobalt oxide by annealing under a hydrogen atmosphere. The average crystallite size of the synthesized porous particles ranged from 7 to 30 nm, depending on the synthesis temperature. The electrochemical characteristics of electrodes based on synthesized cobalt oxide and reduced cobalt oxide are investigated in an electrochemical cell using a 3.5 M KOH solution as the electrolyte. The results of electrochemical mea

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10

Sun, Qiang, Zhong Wang, Da Wang, Zhe Hong, Mingdong Zhou, and Xuebing Li. "A review on the catalytic decomposition of NO to N2 and O2: catalysts and processes." Catalysis Science & Technology 8, no. 18 (2018): 4563–75. http://dx.doi.org/10.1039/c8cy01114a.

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Recent advances in the catalytic decomposition of NO have been overviewed and divided into three categories: metal oxide catalysts (including perovskites and rare earth oxides), supported metal oxide catalysts (including alkali metals, cobalt oxide and noble metals) and Cu-ZSM-5.

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11

Sakhnenko, Nikolay, Maryna Ved’, and Ann Karakurkchi. "PECULIARITIES OF COBALT CONTAINING OXIDE COATINGS FORMATION ON SILUMIN." Ukrainian Chemistry Journal 86, no. 1 (2020): 12–21. http://dx.doi.org/10.33609/0041-6045.86.1.2020.12-21.

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The process of mixed oxide coatings formation on a high-silicon aluminum alloy in a cobalt-containing pyrophosphate electrolyte by the plasma-electrolytic oxidation (PEO) method is studied. It was shown that AL25 chemical composition heterogeneity causes the consumption of a part of the anode current to homogenize the treated surface, which is reflected in minimizing the content of doping components at the initial processing stage. It was established that the growth of mixed oxides Al2O3·CoxOy relative mass is a function of time with a maximum at 55 minutes. The chemical, phase composition and

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12

Sokolov, Ilya E., Valery V. Fomichev, Ruslan M. Zakalyukin, et al. "SYNTHESIS OF NANOSIZED ZIRCONIUM DIOXIDE, COBALT OXIDE AND RELATED PHASES IN SUPERCRITICAL CO2 FLUID." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 64, no. 5 (2021): 35–43. http://dx.doi.org/10.6060/ivkkt.20216405.6060.

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This study is devoted to obtaining nanoscale zirconium dioxide, cobalt oxide and related phases by SAS method in supercritical carbon dioxide. The synthesized compounds were characterized by a complex of physico-chemical analytical methods: infrared spectroscopy, differential scanning calorimetry, X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy. The experimental parameters for obtaining the nanoparticles were: pressure 10 MPa, temperature 40 °C, carbon dioxide supply rate 35 g/min, the initial solution supply rate 0.5 ml/min. Individual phases containing z

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13

Badding, John V. "Cobalt oxide layers." Nature Materials 2, no. 4 (2003): 208–10. http://dx.doi.org/10.1038/nmat868.

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14

Young, Jay A. "Cobalt(II) Oxide." Journal of Chemical Education 78, no. 10 (2001): 1328. http://dx.doi.org/10.1021/ed078p1328.

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15

Celen, Burak, Melik Bugra Ozcelik, Furkan Metin Turgut, et al. "Calendar ageing modelling using machine learning: an experimental investigation on lithium ion battery chemistries." Open Research Europe 2 (August 12, 2022): 96. http://dx.doi.org/10.12688/openreseurope.14745.1.

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Background: The phenomenon of calendar ageing continues to have an impact on battery systems worldwide by causing them to have undesirable operation life and performance. Predicting the degradation in the capacity can identify whether this phenomenon is occurring for a cell and pave the way for placing mechanisms that can circumvent this behaviour. Methods: In this study, the machine learning algorithms, Extreme Gradient Boosting (XGBoost) and artificial neural network (ANN) have been used to predict the calendar ageing data belonging to six types of cell chemistries namely, Lithium Cobalt Oxi

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16

Celen, Burak, Melik Bugra Ozcelik, Furkan Metin Turgut, et al. "Calendar ageing modelling using machine learning: an experimental investigation on lithium ion battery chemistries." Open Research Europe 2 (February 22, 2023): 96. http://dx.doi.org/10.12688/openreseurope.14745.2.

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Background: The phenomenon of calendar ageing continues to have an impact on battery systems worldwide by causing them to have undesirable operation life and performance. Predicting the degradation in the capacity can identify whether this phenomenon is occurring for a cell and pave the way for placing mechanisms that can circumvent this behaviour. Methods: In this study, the machine learning algorithms, Extreme Gradient Boosting (XGBoost) and artificial neural network (ANN) have been used to predict the calendar ageing data belonging to six types of cell chemistries namely, Lithium Cobalt Oxi

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17

Karakurkchi, Ann V., Nykolay D. Sakhnenko, Maryna V. Ved’, Ihor S. Luhovskyi, Hryhoriy A. Drobakha, and Maryna V. Mayba. "Features of Plasma Electrolytic Formation of Manganese- and Cobalt-Containing Composites on Aluminum Alloys." Advances in Materials Science and Engineering 2019 (August 7, 2019): 1–13. http://dx.doi.org/10.1155/2019/6381291.

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This paper presents the results of studies on the electrochemical treatment characteristics of aluminum and alloys in alkaline electrolytes. It is shown that the heterogeneity of the alloys composition complicates the formation of the surface oxide layer. To homogenize the treated surface and obtain oxide coatings doped with manganese and cobalt, electrolytes based on KOH and K4P2O7 with the addition of KMnO4 and CoSO4 were used. Plasma electrolytic oxidizing (PEO) in these electrolytes in the range of current densities 5–20 A/dm2 allows to obtain mixed oxide coatings which contained both alum

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18

Chansaengsri, Kasidid, Korakot Onlaor, Thutiyaporn Thiwawong, and Benchapol Tunhoo. "Effect of Substrate Temperature of on Properties of Cobalt Oxide Thin Films Prepared by Electrostatic Spray Deposition Technique." Applied Mechanics and Materials 848 (July 2016): 103–6. http://dx.doi.org/10.4028/www.scientific.net/amm.848.103.

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In this work, the influence of the substrate temperature on properties of cobalt oxide thin films has been reported. Cobalt oxide thin films were prepared by electrostatic spray deposition technique on glass substrate at different temperature of the substrate. The properties of cobalt oxide films were characterized by X-Ray diffraction (XRD), scanning electron microscope, Raman spectroscopy, UV-visible spectrophotometer, respectively. In additional, the crystalline structural parameters can be performed from XRD data. Phase transformation of cobalt oxide films due to different substrate temper

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19

Wai, Lee Chia, and Roszilah Ahmad. "Effect of Chromium (II, III) Oxide and Cobalt Oxide on the Colour and Fineness of Cement." Materials Science Forum 857 (May 2016): 373–76. http://dx.doi.org/10.4028/www.scientific.net/msf.857.373.

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The objective of this study is to determine the optimum portions of coloured pigments, chromium (I, II) oxide (Cr2O3) and cobalt oxide in producing coloured cement. The fineness (specific surface area - SS) of coloured cement via Blaine permeability test is also determined. The green and grey colours become darker as the percentages of chromium (II, III) oxide and cobalt oxide are increased. The chromium (II, III) oxide coloured cement become coarser as the added portions of chromium (II, III) oxide pigment is increased from 3 to 9 %. For cobalt oxide coloured cement, it becomes finer as the a

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20

Chopra, Nitin, Yuan Li, and Kuldeep Kumar. "Cobalt oxide-tungsten oxide nanowire heterostructures: Fabrication and characterization." MRS Proceedings 1675 (2014): 191–96. http://dx.doi.org/10.1557/opl.2014.863.

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ABSTRACTNanowire heterostructures comprised of cobalt oxide and tungsten oxide were fabricated in a core/shell configuration. This was achieved by sputter coating tungsten oxide shells on standing cobalt oxide nanowires on a substrate. To ensure the polycrystallinity of tungsten oxide shell, the nanowire heterostructures were subjected to post-sputtering annealing process. The cobalt oxide nanowires for this study were grown employing a thermal method via vapor-solid growth mechanism. The crystal structures, morphologies, dimensions, and phases at various growth stages of nanowire heterostruct

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21

Andreev, Andrey S., Serguey F. Tikhov, Aleksey N. Salanov, et al. "Design of Al₂O₃/CoAlO/CoAl Porous Ceramometal for Multiple Applications as Catalytic Supports." Advanced Materials Research 702 (May 2013): 79–87. http://dx.doi.org/10.4028/www.scientific.net/amr.702.79.

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Porous ceramometal Al2O3/CoAlO/CoAl was studied by set of physicochemical techniques such as XRD, SEM, internal field59Co and27Al MAS NMR, and porosity measurements. They revealed the cermet containing three parts. First, cobalt-free large porous alumina particles which surrounded by the second oxide part representing spinel CoxAl3-xO4(x=1,2,3) oxides. And third, oxygen-free metallic part consists of cobalt metal particles covered by Co-Al oxide protecting the metallic part from oxidation. Porosity measurements ascertained high porosity (60%) and good SSA (122 m2/g). Also the enhanced adsorpti

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22

Mugheri, Abdul Qayoom, Aneela Tahira, Umair Aftab, et al. "Chemically Coupled Cobalt Oxide Nanosheets Decorated onto the Surface of Multiwall Carbon Nanotubes for Favorable Oxygen Evolution Reaction." Journal of Nanoscience and Nanotechnology 21, no. 4 (2021): 2660–67. http://dx.doi.org/10.1166/jnn.2021.19108.

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Cobalt oxide has been widely investigated among potential transition metal oxides for the electrochemical energy conversion, storage, and water splitting. However, they have inherently low electronic conductivity and high corrosive nature in alkaline media. Herein, we propose a promising and facile approach to improve the conductivity and charge transport of cobalt oxide Co3O4 through chemical coupling with well-dispersed multiwall carbon nanotubes (MWCNTs) during hydrothermal treatment. The morphology of prepared composite material consisting of nanosheets which are anchored on the MWCNTs as

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23

Lin, Chuen-Chang, You-Lun Shen, and An-Na Wu. "The Effects of Power Levels/Time Periods for Sputtering Cobalt onto Carbon Nanotubes/Graphene Composites and Cobalt Annealed on the Characteristics of Anode Materials for Lithium-Ion Batteries." Journal of Nanomaterials 2018 (October 16, 2018): 1–11. http://dx.doi.org/10.1155/2018/9489042.

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Carbon nanotubes/graphene composites are directly grown on nickel foil without additional catalysts by chemical vapor deposition (CVD). Next, the cobalt is deposited on carbon nanotubes/graphene composites by radio frequency (RF) sputtering with different power levels and time periods. Then, the cobalt is transformed into cobalt oxide by annealing. A longer time period of sputtering leads to higher specific capacity. Furthermore, the electrochemical stability of cobalt oxide/carbon nanotubes/graphene composites is higher than that of cobalt oxide.

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Chansaengsri, Kasidid, Korakot Onlaor, Thutiyaporn Thiwawong, and Benchapol Tunhoo. "Effect of Annealing Temperature on Structural and Optical Properties of Cobalt Oxide Thin Films Prepared by Electrostatic Spray Deposition Technique." Key Engineering Materials 675-676 (January 2016): 229–32. http://dx.doi.org/10.4028/www.scientific.net/kem.675-676.229.

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In this work, cobalt oxide thin films were prepared by electrostatic spray deposition (ESD) technique on glass substrate. The influence of the annealing temperature on properties of cobalt oxide film was investigated. The structural, optical and morphology of cobalt oxide thin films were characterized by X-ray diffraction (XRD), Raman spectroscopy, UV-Visible spectrophotometer, scanning electron microscope, respectively. The crystalline parameters such as crystalline size of films can be obtained from XRD spectra. Phase transformation due to the different annealing temperature in cobalt oxide

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25

Waris, Abdul, Misbahud Din, Asmat Ali, et al. "Green fabrication of Co and Co3O4 nanoparticles and their biomedical applications: A review." Open Life Sciences 16, no. 1 (2021): 14–30. http://dx.doi.org/10.1515/biol-2021-0003.

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Abstract Nanotechnology is the fabrication, characterization, and potential application of various materials at the nanoscale. Over the past few decades, nanomaterials have attracted researchers from different fields because of their high surface-to-volume ratio and other unique and remarkable properties. Cobalt and cobalt oxide nanoparticles (NPs) have various biomedical applications because of their distinctive antioxidant, antimicrobial, antifungal, anticancer, larvicidal, antileishmanial, anticholinergic, wound healing, and antidiabetic properties. In addition to biomedical applications, c

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26

Huang, Huanshao, Jiajun Wang, Junai Zhang, Jiye Cai, Jiang Pi, and Jun-Fa Xu. "Inspirations of Cobalt Oxide Nanoparticle Based Anticancer Therapeutics." Pharmaceutics 13, no. 10 (2021): 1599. http://dx.doi.org/10.3390/pharmaceutics13101599.

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Cobalt is essential to the metabolism of all animals due to its key role in cobalamin, also known as vitamin B12, the primary biological reservoir of cobalt as an ultra-trace element. Current cancer treatment strategies, including chemotherapy and radiotherapy, have been seriously restricted by their side effects and low efficiency for a long time, which urges us to develop new technologies for more effective and much safer anticancer therapies. Novel nanotechnologies, based on different kinds of functional nanomaterials, have been proved to act as effective and promising strategies for antica

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27

Kosiorek, Milena, and Mirosław Wyszkowski. "Remediation of Cobalt-Contaminated Soil Using Manure, Clay, Charcoal, Zeolite, Calcium Oxide, Main Crop (Hordeum vulgare L.), and After-Crop (Synapis alba L.)." Minerals 10, no. 5 (2020): 429. http://dx.doi.org/10.3390/min10050429.

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This study was undertaken to determine the effects of various substances on soil contaminated with cobalt (Co) on the mass and content of cobalt in the main crop—spring barley (Hordeum vulgare L.)—and the after-crop—white mustard (Synapis alba L.). Manure, clay, charcoal, zeolite, and calcium oxide were used for phytostabilization. Cobalt was applied in the form of CoCl2 in doses of 0, 20, 40, 80, 160, and 320 mg/kg soil. Amendments in the form of manure, clay, charcoal, and zeolite were applied in an amount of 2% in relation to the weight of the soil in a pot, with calcium oxide at a dose of

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Conrath, Elodie, and Patrice Berthod. "Oxide Spallation During Post-isothermal High Temperature Oxidation Cooling of Cr-rich Cast Alloys Highly Alloyed with Hf." Open Materials Science Journal 10, no. 1 (2016): 89–100. http://dx.doi.org/10.2174/1874088x01610010089.

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Cobalt, nickel and iron-based alloys containing 25wt.%Cr and strengthened either by chromium carbides or by HfC were oxidized at 1000, 1100 and 1200°C to obtain external oxide scales. The spallation of these oxides during the post-oxidation cooling was studied by exploiting the cooling part of the thermogravimetry curves. The best resistant alloys against scale spallation were the iron-based alloys which did not lose oxide. The nickel-based alloys well behaved too. The worst alloys were the cobalt alloys, principally due to the complex composition of the oxide scales. Beside the base element,

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29

Qin, Bangchang, Yang Tian, Pengxiang Zhang, et al. "A density functional theory study of the oxygen reduction reaction on the (111) and (100) surfaces of cobalt(II) oxide." Progress in Reaction Kinetics and Mechanism 44, no. 2 (2019): 122–31. http://dx.doi.org/10.1177/1468678319825727.

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Density functional theory calculations were employed to investigate the electrochemical oxygen reduction reaction on the (111) and (100) surfaces of cobalt(II) oxide. Different mechanisms were applied to evaluate the oxygen reduction reaction performance of cobalt(II) oxide structures in terms of the Gibbs free energy and density of states. A variety of intermediate structures based on associative and dissociative mechanisms were constructed and optimized. As a result, we estimated the catalytic activity by calculating the free energy of the intermediates and constructing free energy diagrams,

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Govindasamy, Rajakumar, Vaishnavi Raja, Sonalika Singh, et al. "Green Synthesis and Characterization of Cobalt Oxide Nanoparticles Using Psidium guajava Leaves Extracts and Their Photocatalytic and Biological Activities." Molecules 27, no. 17 (2022): 5646. http://dx.doi.org/10.3390/molecules27175646.

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The advanced technology for synthesizing nanoparticles utilizes natural resources in an environmentally friendly manner. Additionally, green synthesis is preferred to chemical and physical synthesis because it takes less time and effort. The green synthesis of cobalt oxide nanoparticles has recently risen due to its physico-chemical properties. In this study, many functional groups present in Psidium guajava leaf extracts are used to stabilize the synthesis of cobalt oxide nanoparticles. The biosynthesized cobalt oxide nanoparticles were investigated using UV-visible spectroscopic analysis. Ad

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Azzi, Hajer, I. Rekkab-Hammoumraoui, L. Chérif-Aouali, and A. Choukchou-Braham. "Mesoporous Co3O4 as a New Catalyst for Allylic Oxidation of Cyclohexene." Bulletin of Chemical Reaction Engineering & Catalysis 14, no. 1 (2019): 112. http://dx.doi.org/10.9767/bcrec.14.1.2467.112-123.

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Mesoporous cobalt oxide was investigated for the liquid phase oxidation of cyclohexene using tertiobutylhydroperoxide (TBHP) as an oxidant. The results were compared with several series of supported cobalt catalysts to study the influence of the cobalt loading and solvents on the overall conversion and selectivity. Mesoporous cobalt was synthesized through the nanocasting route using siliceous SBA-15 mesoporous material as a hard template and cobalt nitrate as the cobalt oxide precursor. Supported cobalt oxide catalysts (Co/MxOy) were synthesized by the impregnation method using two loadings (

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32

Feizi, Hadi, Robabeh Bagheri, Zhenlun Song, Jian-Ren Shen, Suleyman I. Allakhverdiev, and Mohammad Mahdi Najafpour. "Cobalt/Cobalt Oxide Surface for Water Oxidation." ACS Sustainable Chemistry & Engineering 7, no. 6 (2019): 6093–105. http://dx.doi.org/10.1021/acssuschemeng.8b06269.

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33

Hassanzadeh-Tabrizi, S. A., and E. Taheri-Nassaj. "Effect of cobalt oxide on the sintering and grain growth of Al2O3-YAG composite nanopowder." Science of Sintering 42, no. 3 (2010): 321–28. http://dx.doi.org/10.2298/sos1003321h.

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In the present study, the effect of cobalt oxide on the densification of Al2O3-YAG composite nanopowder was investigated. An amorphous nanopowder was synthesized and crystallized to Al2O3-YAG after heat-treatment via a solid-state reaction. The average particle size of heat-treated powder at 800?C was about 80 nm. Cobalt oxide improved the sintering rate of Al2O3-YAG composite nanopowders and promoted grain boundary mobility. Cobalt oxide doping increased the ratio of densification/grain growth rate. The activation energy for grain growth decreased from 590 to 485 kJ/mol by adding cobalt oxide

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34

Li, Cai Xia, Hai Fang Xu, Tao Feng, Na Zhang, and Qiang Li. "Synthesis and Characterization of CoO₂ Nanosheets." Advanced Materials Research 177 (December 2010): 5–8. http://dx.doi.org/10.4028/www.scientific.net/amr.177.5.

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The layered sodium cobalt oxide Na0.6CoO2 phase has been synthesized from Na2O2 and Co3O4 by solid-state reaction at 550°C for 12h with the heating rate about 2°C /min. The colloidal suspension of exfoliated, layered cobalt oxide nanosheets was prepared through the intercalation of tetrabutyl ammonium hydroxide ions (TBA) into protonated sodium cobalt oxide. The as-obtained composites were analyzed by powder X-ray diffraction (XRD). They were also cross-confirmed by a range of methods including UV/Vis spectroscopy, and Transmission Electron Microscopy (TEM). The Zeta-potential measurements cle

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35

Sun, Junyong, Tian Gan, Cui Yang, Zhaoxia Shi, Kejing Huang, and Yanming Liu. "Novel electroanalytical platform based on bimetallic oxide nanospheres for the sensitive determination of Rhodamine B." Canadian Journal of Chemistry 92, no. 7 (2014): 640–46. http://dx.doi.org/10.1139/cjc-2014-0118.

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In this work, uniform cobalt and nickel bimetallic oxides were formed by calcining the carbon templates, which were then modified on a glassy carbon electrode (cobalt–nickel oxide/GCE) as a novel system for the preparation of an electrochemical sensing platform. The electrochemical oxidation behavior of Rhodamine B (RB) at the cobalt–nickel oxide/GCE was investigated using differential pulse voltammetry under optimal conditions; the high electrocatalytic activity of the modified electrode toward analysis of RB was indicated. In addition, a linear range of 0.03−1.0 μmol L–1 and a low detection

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Gogoi, M., and B. K. Das. "Synthesis of Nanostructured Cobalt Oxides using Cobalt(II) Fumarate Hydrate as Metal-Organic Precursor." Asian Journal of Chemistry 32, no. 12 (2020): 3144–50. http://dx.doi.org/10.14233/ajchem.2020.22970.

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A series of nanostructured cobalt oxides have been prepared from a metal-organic precursor viz. [Co(fum)(H2O)4]·H2O (fum = fumarate) by using capping agents, ethylene glycol and polyethylene glycol via thermal and solvothermal decomposition in ethanol and also by doping with RuCl3·xH2O via solvothermal route. The nano oxides were characterized by IR, UV-vis spectroscopy, powder XRD, SEM and TEM analysis. The nano oxides exhibit varied morphologies and particle sizes. The TEM images reveal homogeneously distributed particles for all the oxides. The band gap energy values the Ru-doped cobalt oxi

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37

Song, Yu, Mingyue Zhang, Tianyu Liu, Tianjiao Li, Di Guo, and Xiao-Xia Liu. "Cobalt-Containing Nanoporous Nitrogen-Doped Carbon Nanocuboids from Zeolite Imidazole Frameworks for Supercapacitors." Nanomaterials 9, no. 8 (2019): 1110. http://dx.doi.org/10.3390/nano9081110.

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Pyrolyzing metal–organic frameworks (MOFs) typically yield composites consisting of metal/metal oxide nanoparticles finely dispersed on carbon matrices. The blend of pseudocapacitive metal oxides and conductive metals, as well as highly porous carbon networks, offer unique opportunities to obtain supercapacitor electrodes with mutually high capacitances and excellent rate capabilities. Herein, we demonstrate nitrogen-doped carbon nanocuboid arrays grown on carbon fibers and incorporating cobalt metal and cobalt metal oxides. This composite was synthesized via pyrolysis of a chemical bath depos

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38

Zhang, Weidong, Paola Anguita, Javier Díez-Ramírez, Claude Descorme, Jose Luis Valverde, and Anne Giroir-Fendler. "Comparison of Different Metal Doping Effects on Co3O4 Catalysts for the Total Oxidation of Toluene and Propane." Catalysts 10, no. 8 (2020): 865. http://dx.doi.org/10.3390/catal10080865.

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Metal-doped (Mn, Cu, Ni, and Fe) cobalt oxides were prepared by a coprecipitation method and were used as catalysts for the total oxidation of toluene and propane. The metal-doped catalysts displayed the same cubic spinel Co3O4 structure as the pure cobalt oxide did; the variation of cell parameter demonstrated the incorporation of dopants into the cobalt oxide lattice. FTIR spectra revealed the segregation of manganese oxide and iron oxide. The addition of dopant greatly influenced the crystallite size, strain, specific surface area, reducibility, and subsequently the catalytic performance of

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39

Ramesh, Thimmasandra Narayan. "Effect of Substituents on the Electrochemical Reversible Discharge Capacity of Cobalt Hydroxide Electrodes." Journal of New Materials for Electrochemical Systems 18, no. 2 (2015): 091–93. http://dx.doi.org/10.14447/jnmes.v18i2.375.

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Cobalt hydroxide, nickel hydroxide-cobalt hydroxide and zinc oxide-cobalt hydroxide biphasic mixtures were prepared by precipitation method. In spite of structural similarities exhibited by nickel hydroxide and cobalt hydroxide samples, former is a good electrode material and exchanges 1e-/Ni while latter does not show any reversibility. Presence of small amount of other metal ions such as nickel or zinc in the lattice of cobalt hydroxide or as a biphasic mixture of cobalt hydroxide-nickel hydroxide/cobalt hydroxide- zinc oxide, exchange up to 0.2 to 0.24e- exchange compared to pure cobalt hyd

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40

El Zanin, A. R., and S. V. Boroznin. "Quantum chemical modeling of the surface modification of an “armchair” carbon nanotube with cobalt oxide." Izvestiya Vysshikh Uchebnykh Zavedenii. Materialy Elektronnoi Tekhniki = Materials of Electronics Engineering 27, no. 4 (2025): 317–23. https://doi.org/10.17073/1609-3577j.met202411.637.

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In this work the adsorption of the cobalt oxide on the surface of the “armchair” carbon nanotube (CNT) in three positions of the adsorption was investigated by quantum chemical modeling with methods of the density functional theory on the B3LYP/3-21G level. The values of the band gap of the pure CNT(6,6) and CNT(6,6)/Co3O4 composites with different adsorption positions were calculated and the mechanisms of its change were determined, the charge distribution in the obtained structures was analyzed. The conducted study permitted the establishment of the possibility of surface modification of CNT

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41

Amiruddin, Erwin, Amir Awaluddin, Martha Rianna, et al. "Enhanced Magnetic Properties of Iron Oxide Nanoparticles Encapsulated in Cobalt Nanopowder Derived from Sunur-Pariaman Beach Sand." Journal of Physics: Conference Series 2733, no. 1 (2024): 012026. http://dx.doi.org/10.1088/1742-6596/2733/1/012026.

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Abstract Cobalt encapsulated iron oxide nanoparticles based on Sunur-Pariaman beach sand were prepared using ball milling method. Cobalt nanoparticles with concentration of 0, 5,10 and 15 wt.% were added to the iron oxide nanoparticles. Un-encapsulated iron oxide nanoparticles revealed as pure cubic structure of magnetite phase well matched to JCPDS No. 03-0863 with crystallite size in the range of 30.86 -34.91 nm confirmed by X-Ray diffractometer (XRD). Saturation, remanance magnetization and coercivity increase with an increase of cobalt concentration for Co-encapsulated iron oxide nanopartc

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Chen, Tao, Shengli Pang, Xiangqian Shen, Xuening Jiang та Wenzhi Wang. "Evaluation of Ba-deficient PrBa1−xFe2O5+δ oxides as cathode materials for intermediate-temperature solid oxide fuel cells". RSC Advances 6, № 17 (2016): 13829–36. http://dx.doi.org/10.1039/c5ra19555a.

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Wang, Long Fan, Zhi Jian Peng, Ming Lei, and Xiu Li Fu. "Solvothermal Growth of Cobalt Oxide Hexagon Nanodiscs." Key Engineering Materials 512-515 (June 2012): 166–69. http://dx.doi.org/10.4028/www.scientific.net/kem.512-515.166.

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In this work, cobalt oxide nanodiscs were successfully fabricated through a simple solvothermal synthesis method. The obtained cobalt hydroxide nanodiscs are of single-crystalline hexagonal structure with well-defed nanodiscs were found to have very weak magnetic properties, much weaker than its bulk cobalt oxide counterparts, which might find interesting application in special electromagnetism devices.

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44

Ved, M. V. "Functional mixed cobalt and aluminum oxide coatings for environmental safety." Functional materials 24, no. 2 (2017): 005–310. http://dx.doi.org/10.15407/fm24.02.303.

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Vasant Dilwale, Ganesh. "Chemical Synthesis of Cobalt Oxide and Study of Structural Properties." International Journal of Science and Research (IJSR) 10, no. 11 (2021): 839–41. https://doi.org/10.21275/sr211116132657.

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46

Yang, Fan, Xinghao Zhou, Noah T. Plymale, Ke Sun, and Nathan S. Lewis. "Evaluation of sputtered nickel oxide, cobalt oxide and nickel–cobalt oxide on n-type silicon photoanodes for solar-driven O2(g) evolution from water." Journal of Materials Chemistry A 8, no. 28 (2020): 13955–63. http://dx.doi.org/10.1039/d0ta03725g.

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Thin films of nickel oxide (NiO<sub>x</sub>), cobalt oxide (CoO<sub>x</sub>) and nickel–cobalt oxide (NiCoO<sub>x</sub>) produced integrated, protected Si (111) photoanodes integrated, protected Si photoanodes that did not require deposition of a separate heterogeneous electrocatalyst for water oxidation.

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47

Li, Lin Bo, Juan Qin Xue, Tao Hong, Jun Yang, and Xing Wang. "Separation of Cobalt from Zinc Sulfate Solution by Novel Oxidant." Materials Science Forum 695 (July 2011): 145–48. http://dx.doi.org/10.4028/www.scientific.net/msf.695.145.

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The separation of cobalt from zinc sulfate solutions by oxidation-precipitation process using peroxy-monosulfuric acid as oxidant has been presented according to the technological conditions of removal of cobalt from zinc electrolyte. After investigating the important parameters governing the separation of cobalt and their effect on the separation process, the optimal parameters of oxidation precipitation of cobalt were determined, the oxidation precipitation percent of cobalt was up to 90% under the conditions. The XRD analysis results of precipitates demonstrated that the precipitate was cob

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Colley, Saul E., Richard G. Copperthwaite, Graham J. Hutchings, Gary A. Foulds, and Neil J. Coville. "Cobalt/manganese oxide catalysts." Applied Catalysis A: General 84, no. 1 (1992): 1–15. http://dx.doi.org/10.1016/0926-860x(92)80335-a.

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Grimes, Robin W., and K. Peter D. Lagerlof. "Polymorphs of Cobalt Oxide." Journal of the American Ceramic Society 74, no. 2 (1991): 270–73. http://dx.doi.org/10.1111/j.1151-2916.1991.tb06873.x.

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Liu, Zhifeng, Chonghao Ma, Qijun Cai, Tiantian Hong, Keying Guo, and Lu Yan. "Promising cobalt oxide and cobalt oxide/silver photocathodes for photoelectrochemical water splitting." Solar Energy Materials and Solar Cells 161 (March 2017): 46–51. http://dx.doi.org/10.1016/j.solmat.2016.11.026.

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