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Showing 1 to 20 of 929 for “"cobalt"”.
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Properties of cobalt/copper and cobalt/palladium multilayers.
The physical properties of Co/Cu and Co/Pd magnetic multilayers have been studied. The Co/Cu multilayers were prepared by sputtering, while the Co/Pd multilayers were made by sputtering and molecular beam epitaxy (MBE). Various x-ray diffraction techniques have been used to study the structure of …
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Magnetic properties of samarium-cobalt and cobalt-platinum.
Thesis: B.S., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 1976
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The Leaching of Cobalt in Platinum-Cobalt Fuel Cell Catalysts
Platinum-cobalt catalysts have proved to be promising alternatives to the conventional platinum catalyst used for the ORR reaction at the cathode of PEM fuel cells. These catalysts, however, undergo leaching of cobalt in the harsh environment of the fuel cell during its operation as well as during …
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Metallic cobalt derived from cobalt nitrides for Fischer-Tropsch Synthesis
… The transition elements namely ruthenium, iron, cobalt and nickel are highly active catalysts in FTS, however cobalt will be the focus of this research. Cobalt (Co) has two common crystalline phases: hexagonal close-packed (hcp) and face-centred cubic (fcc). Both these phases are active under FTS …
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Cobalt silicide characterization
… to form on narrow poly-lines and gate shorting. Cobalt silicide is an alternative to TiSi2 due to its scalability (down to 0.065 mum 2) while providing acceptable sheet resistance, better heat cycle immunity, and good junction leakage characteristics; Key factors to be considered for a silicide …
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Homogeneous Cobalt Catalyzed Oxidations
… of the mechanism. Coordination of O(,2) to this cobalt(II) complex enhances the ability of the dioxygen to abstract hydrogen atoms from the phenol to produce phenoxy radicals. This proposed hydrogen atom abstraction step is supported by hydrogen bonding and EPR studies. A deuterium isotope study …
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Cobalt core-shell nanoparticles as precursors for cobalt-based Fischer-Tropsch synthesis catalysts
… were chosen as core materials around which a cobalt (II, III) oxide (Co3O4) shell was grown. These ferrites were chosen due to their structural similarity to Co3O4 as this was expected to allow an epitaxial growth of the Co3O4 shell onto the ferrite core. Additionally, the difference in the …
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The interaction of cobalt, amino acids, and cobalt amino acid complexes with sediment surfaces
… This study investigates the adsorption of cobalt, amino acids, and cobalt amino acid complexes on both Na⁺-montmorillonite and Na⁺-birnessite (MnO₂). Amino acids were also adsorbed on Co²⁺-saturated montmorillonite and birnessite. The oxidation state and chemical nature of sorbed cobalt and …
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Germanium derivatives of cobalt carbonyl
… of the already-established germanium – bridged dicobalt carbonyl derivatives. The relationships between and interconversions of three tetracobalt derivatives of Germanium are discussed. A review of Group IVB - Cobalt carbonyl derivatives is presented along with a discussion of the mass and …
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Nuclear Orientation of Cobalt Isotopes
Made available in DSpace on 2015-05-12T17:12:02Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0018141.PDF: 3013863 bytes, checksum: d38000862416296a63d83da814ae6c4a (MD5) Previous issue date: 1956
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A 59-Cobalt NMR Investigation of the Hydrogen/Deuterium Exchange Kinetics in Cobalt(III) Complexes
… the hydrogen/deuterium exchange kinetics in cobalt(III) complexes are being investigated. In the presence of deuterated solvents, (e.g. D2 0 and CH3CH20D) the amine hydrogens in the complexes are exchanged for deuteriums. For the hexaamminecobalt(III) ion, 19 isotopmers (H18D0 to HOD 18) are …
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Cobalt-catalyzed Kumada coupling and the development of a CC ligand and metalation to cobalt
… metals. These ligands were treated with various cobalt sources to attempt to coordinate the NHC and affect CarylBr activation to produce the desired bidentate complexes. However, four coordinate cobalt(II) complexes binding at the NHC of two ligands and two halides were preferentially formed, …
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Solvent Extraction of Copper, Cobalt, and Nickel Material from the Missouri Cobalt Project in Fredricktown, Missouri
Cobalt and nickel are important metals used in the production of rechargeable batteries. Demand for these metals, along with copper, are increasing due to the increased production of electric cars and other electronic devices. Cobalt has historically been mined in the Congo with very dangerous …
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Binuclear Cobalt(ii) Complexes and Catalysis Studies on Cobalt(ii) Oxygen Carriers and Charcoal-Supported Palladium
Made available in DSpace on 2014-12-10T23:01:57Z (GMT). No. of bitstreams: 1 7500389.pdf: 4107811 bytes, checksum: 441b7b8de9b56a28cff4edf09a0bc1ad (MD5) Previous issue date: 1974
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Magnetic Clusters in Copper - Cobalt Alloys
Made available in DSpace on 2015-05-12T21:41:03Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6915329.PDF: 2801055 bytes, checksum: 2dfe5f088825f219a73b023ba1a713f3 (MD5) Previous issue date: 1969
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Electron-Transfer Reactions of Cobalt Complexes
Made available in DSpace on 2014-12-10T23:01:40Z (GMT). No. of bitstreams: 1 7411955.pdf: 7201152 bytes, checksum: 56c9ca0356be6ee28d997ecf7a5783a4 (MD5) Previous issue date: 1973
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Cobalt catalysts towards parahydrogen induced polarization
… reported with varying degrees of success using cobalt, nickel, and zirconium metal sources. Additionally, the synthesis of an electron rich CCC ligand was explored via the installation of amine, methoxy, and tert¬-butyl moieties in the backbone of the ligand. Success was achieved in the …
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Cobalt, zinc, and cadminum tropocoronand complexes
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1997.
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