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 252 for “"Bimetallic"”.
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Bimetallic Nanoporous Sponges
Nanoporous silver (np-S) is a promising nanomaterial with unique physical properties distinct from its bulk counterpart, including high surface area, enhanced chemical sensing and tuneable optical and electrical properties. This thesis explores the fabrication and characterisation of np-S thin …
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Bimetallic Catalyst for Lignin Depolymerization
… This thesis will focus on the development of a bimetallic catalyst with copper and nickel co-doped on a hydrotalcite support, testing the hypothesis that a bimetallic catalyst containing copper and nickel will have better reforming ability than a catalyst containing only nickel and will have …
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Shape-Selective Growth of Bimetallic Nanostructures
Bimetallic Pt-based and Au/Ag nanostructures nanocrystals have attracted tremendous attention in recent years because they have shown unique catalytic and optical properties. In this regard, we firstly tailored the galvanic replacement reaction (GRR) for the synthesis of Pt/Ag bimetallic hollow …
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Synthesis, characterisation and applications of bimetallic nanoparticles
… employed to characterise the monometallic and bimetallic AuNRs. AuNSs, AuNRs, Au@Pd NRs, Au@Pd NSs, Au@Pt NRs and Au@Rh core-shell nanorods were synthesised and characterised by one or both of the methods mentioned above. The core-shell structures of gold with other precious metals studied in …
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Preparation and characterization of bimetallic core-shell nanoparticles
… reports two novel techniques for synthesising bimetallic core-shell nanoparticles. The first technique is the chemical deposition of transition metal salts onto gold nanoparticle seeds. The transition metals used were platinum, palladium and rhodium. Gold nanoparticle seeds were produced using …
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Segregation and Phase Dynamics in Supported Bimetallic Nanoparticles
The reaction between a silicon monolayer deposited on Pt(111) by chemical vapor deposition (CVD) using silane (SiH$\sb4)$ is described. Using Auger electron spectroscopy (AES), Si was found to readily diffuse into the Pt substrate and sequentially form at least two unique intermetallic Pt-Si …
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Experimental testing of bimetallic and reactive shaped charge liners
… objectives were to investigate small scale bimetallic and reactive liners and to record the target deformation characteristics of larger scale reactive liners. Tests 1 - 9 used liners of 20.02 mm diameter and were conducted in either a containment tube that housed an array of target plates …
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Ultrafast electron transfer and intersystem crossing in bimetallic molecules
… the ET and ISC dynamics of a prototypical bimetallic FeIICoIII molecule following metal-to-metal charge transfer (MMCT) excitation. Femtosecond optical transient absorption (OTA) spectroscopy supported by time-dependent density functional theory (TD-DFT) find evidence of long-lived FeII …
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Two approaches to the design and synthesis of bimetallic complexes
… largely due to the limited number of available bimetallic species. To study the system systematically, we set our goal to synthesize bimetallic complexes from two independent approaches. In the first approach, five N, N’ -diarylformamidines with symmetric or asymmetric substituents on the phenyl …
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Exploitation of synergy in oxidation catalysis with bimetallic aluminophosphate catalysts
A series of novel bimetallic aluminophosphate catalysts were prepared with the simultaneous isomorphous substitution of cobalt (III) and manganese (III) for aluminium (III) and titanium (IV) replacing phosphorus (V). By substituting simultaneously for both Al (III) and P (V) in the ordered …
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Engineering palladium-on-gold bimetallic nanoparticles as groundwater remediation catalysts
Over the years, our groundwater sources have become contaminated with chlorinated organics, in particular trichloroethene (TCE) due to its exposure as a solvent to degrease metals and electronic parts in the automotive, metals, and electronic industries. Due to its prevalence and toxicity, TCE has …
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Computational Studies on Bimetallic Catalysis and X-ray Absorption Spectroscopy
… discussion on computational studies performed on bimetallic catalysis and on X-ray absorption spectroscopy of insulators. The viability of a bimetallic rhodium and cobalt catalysts for industrially important hydroformylation and aldehyde-water shift catalysis (AWS) is discussed. Density functional …
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Biologically-Inspired Bimetallic Complexes for the Activation of Small Molecules
The activation of dihydrogen has only been observed indirectly through the photolytically-induced H/D exchange of [Fe2(mu-H)(SR) 2(CO)4(PR3)2]+ Fe-only hydrogenase models with D2. The diphosphine diruthenium complex Ru2(S2C3H6)(CO)4(PCy 3)2 oxidatively adds dihydrogen to produce the dihydride …
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Nuclear Magnetic Resonance Study of the Platinum - Rhodium Bimetallic Clusters
We report the study of supported Pt-Rh bimetallic catalysts by $\sp{195}$Pt NMR and by $\sp $C NMR of adsorbed CO. The metal particles are 5A-50A in diameter. Study of the dependence of the $\sp $CO resonance position as a function of Pt/Rh ratio and particle size shows that Rh is segregated to the …
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Nuclear magnetic resonance study of the Pt-Rh bimetallic clusters
We report the study of supported Pt-Rh bimetallic catalysts by 195Pt NMR and by 13C NMR of adsorbed CO. The metal particles are sA-soA in diameter. Study of the dependence of the 13CO resonance position as a function of Pt/Rh ratio and particle size shows that Rh is segregated to the surface. Study …
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Aqueous phase catalysis using mono- and bimetallic transition metal complexes
The synthesis and characterization of monomeric and dimeric salicylaldimine water-soluble ligands is discussed. The salicylaldimine ligands (2.3-2.10) were synthesised via Schiff base condensation reactions of various amines with water-soluble sulfonated salicylaldehydes (2.1 and 2.2). The ligands …
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CuAg bimetallic nanoparticles for the electrochemical reduction of carbon dioxide
… on the synthesis of different ratios of CuAg bimetallic nanoparticles, and their electrocatalytic performance evaluation for the electrochemical reduction of carbon dioxide. Bimetallic nanoparticles were synthesised via a wet chemical method using two synthesis routes. One synthesis was …
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