Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 26 for “"multimetallic"”.
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Structural characterization of multimetallic nanoparticles
<p>Bimetallic and trimetallic alloy nanoparticles have enhanced catalytic activities due to their unique structural properties. Using <em>in situ</em> time-resolved synchrotron based x-ray diffraction, we investigated the structural properties of nanoscale catalysts undergoing various heat …
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NEW MULTIMETALLIC ASSEMBLIES AS PHOTOLUMINESCENT MATERIALS
During the last few decades significant progress has been made in the area of supramolecular polymers, where monomers are held together by non-covalent interactions. In particular, the formation of macromolecular assemblies by employing a metal-ion induced selfassembly process in solution is of …
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Syntheses and transformations of multimetallic nanoparticles
Multimetallic nanoparticles have had increased interest in recent years. In this thesis, we analyze Au, Ag, and Cu nanoparticles and multimetallic nanoparticles containing these three coinage metals. The incorporation of two or more metals together within nanoparticles allows for synergistic …
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Electrochemical Synthesis and Characterisation of Multimetallic Nanostructured Electrocatalysts
… electrode systems. Unique multilayered multimetallic nanoclusters synthesized (with binary active sites of Pt with Ru or Au) exhibited superior electrocatalytic activity towards methanol or formic acid oxidation reactions when benchmarked to equivalent monometallic multilayered Pt. …
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Monometallic and multimetallic complexes as precatalysts in the hydroformylation of olefins
A series of new aryl ether salicylaldimine-based monomeric, dimeric, trimeric and hexameric triazolyl ligands have been synthesised. The N,O-chelating ligands were synthesised via Schiff base condensation reactions of salicylaldehyde with the bromopropylamine hydrobromide salt, followed by the …
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Multimetallic Nanoparticles For Fuel Cell Electrocatalysts: Considerations Of Their Formation And Thin-Film Inspired Compositions
… developed. These studies have revealed several multimetallic systems (both disordered alloys and ordered intermetallics) that are potential candidates for improved anode and cathode electrocatalysts. However, if those complex metallic materials are to be used as fuel cell electrocatalysts, they …
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The synthesis and study of multimetallic Platinum Group Metal complexes as in vitro phamacological agents
The success of cisplatin and its analogues for the treatment of different cancers has had a profound effect on establishing the application of metal complexes in medicine. Lately, increasing drug resistance and the emergence of unwanted side effects to currently available therapies have bred a need …
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Morphology Controlled Synthesis of Copper Based Multimetallic Nanostructures and Their Electrocatalytic Properties for Methanol Oxidation Reaction
… electrocatalytic activity was investigated. Multimetallic, branched core-frame nanostructures were formed by co-reducing Pt and Ru onto the vertices and edges of Cu rhombic dodecahedra. The multimetallic frame nanostructures were formed by etching the coreframe nanostructures. Studies over …
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Multimetallic Supramolecular Complexes: Synthesis, Characterization, Photophysical Studies and Applications in Solar Energy Utilization and Photodynamic Therapy
This thesis describes the study of a series of multimetallic supramolecules containing varied metals and ligands, synthesized by a building block method and characterized by mass spectrometry, electronic absorption spectroscopy, and electrochemistry. Incorporating different functional units into …
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Metal-containing and Metal-free systems for small molecule activation
… describes a tri-aryl benzene ligand scaffold for multimetallic N2 activation. A RuCp* complex was synthesized and characterized by NMR and X-ray crystallography. It offered an easy entry to understanding of the ligand coordination environment. Additionally, several multi-iron complexes were also …
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Heteronuclear trimetallic polyazine complexes of iridium (III) or rhodium (III) as electrocatalysts for the reduction of CO2
… this thesis were focused on the development of multimetallic systems to function as electrocatalysts for the reduction of CO₂.
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Laser-Ionization Time-of-Flight Mass Spectrometry of High Molecular Mass Inorganic Complexes
… in the analysis of high-mass analytes. Large multimetallic complexes, which are efficient solar-energy converters, rely heavily on their chemical structure for optimum operation. Molecular mass determinations of these multimetallic complexes have been problematic due to their lability and high …
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The Synthesis and Photophysical Properties of New Polymetallic Complexes Designed for Use in Photoinitiated Electron Collection
… research was to develop stereochemically defined multimetallic systems for use as light absorbers and electron donor / light absorber dyads in photoinitiated electron transfer and electron collection. The basis for the stereochemical control was provided by the symmetric bridging ligands …
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Synthesis and Characterization of Pt-Ru-Sn Catalysts
… system prepared by impregnation using multimetallic clusters, metal-salts, and the combination of both precursor types. Results show that the PtRu<sub>5</sub>Sn/MgO material has a significantly higher percentage of Sn0 in comparison to Pt-Ru-Sn/MgO and PtRu<sub>5</sub>-Sn/MgO, and a …
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Ultrafast photophysics of transition metal coordination complexes studied with femtosecond extreme ultraviolet transient absorption spectroscopy
… lay essential groundwork for the development of multimetallic catalysts with efficiencies comparable to those found in nature.
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Model systems for the study of active phase evolution in complex bimetallic catalysts (PdZn)
… a simple platform for the study of complex multimetallic catalysts. The use of the silica as a TEM support combined with aberration corrected HRSTEM, EDX, XPS and Raman allowed for a very detailed look into PdZn nanoparticle formation from (Pd,Zn)O → α-Pd → β1-PdZn → Pd2Zn and back to α-Pd. …
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New luminescent iridium (III) complexes containing NCN cyclometallated ligands: synthesis, photophysical properties and emission tuning
… of these complexes for the construction of multimetallic assemblies has been made, through the introduction of bridging ligands into position X.
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HIGH TEMPERATURE NANOMANUFACTURING FOR EMERGING TECHNOLOGIES
… in salt mixtures, we synthesized bimetallic, multimetallic and high entropy alloy nanoparticles (HEA-NPs) containing up to 8 different and immiscible elements. The high temperature leads to atomic mixing in the liquid alloy state, while rapid quenching freezes the completely mixed state to …
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