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 41 for “"Single-metal"”.
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Single metal atom catalysts for the electrochemical reduction of CO2
L'abstract è presente nell'allegato / the abstract is in the attachment
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Development of a plasmon resonance enhanced optical trap for characterisation of single metal nanoparticle
… and suggest methods for characterizing a trapped single nanoparticle. While there are published methods that emphasize on building up an optical trapping setup or trap single gold nanorod using high power lasers, none were found that suggests on constructing a plasmon resonance based optical …
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Synthesis and characterisation of low-cost biopolymeric/mineral composite systems and evaluation of their potential application for heavy metal removal
Heavy metal pollution and waste management are two major environmental problems faced in the world today. Anthropogenic sources of heavy metals, especially effluent from industries, are serious environmental and health concerns by polluting surface and ground waters. Similarly, on a global scale, …
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Mechanistic Investigations of Mandelate Racemase: The Electrophilic Catalysts
… All the family members have highly conserved metal ion ligands. Based on the homology to enolase, which requires two divalent metal ions, MR as well as other members of the enolase superfamily might require two metal ions. The stoichiometries of metal ion requirements for MR, muconate …
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Toward the Synthesis of Designed Metal-Organic Materials
Metal-Organic Materials (MOMs) are an emerging class of crystalline solids that offer the potential for utilitarian design, as one of the greatest scientific challenges is to design functional materials with foreordained properties and eventually synthesize custom designed compounds for projected …
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A Study Of Electrocatalysis In The Oxygen Reduction Reaction Using OpenCatalyst, a Deep-Learning Platform.
… focus on the electrocatalytic properties of bimetallic catalysts—particularly palladiumgold alloys—and their potential to exceed the performance of traditional platinum-based systems. By utilizing Machine Learning (ML) methods as an alternative to Density Functional Theory (DFT), this study …
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Exploring Strategies to Break Adsorption-Energy Scaling Relations in Catalytic CO Oxidation
… effective way to break the scaling constraint is single atom catalysis. Strong interactions of supported single atoms with supports dramatically affect the electronic structure of active sites, which reroutes mechanistic pathways of surface reactions. In my PhD research, we use CO oxidation …
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An Investigation of Dual-Band Fabry-Pérot Resonant Cavity Antennas
… artificial ground plane that replaces the single metal ground plane of the conventional structure. The structure thus consists of an upper cavity region (between the FSS and the partially reflective surface, also known as the PRS) and a lower cavity region (between the ground plane and the …
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Análise teórico-experimental de microrreatores para síntese de biodiesel com recuperação de calor rejeitado
… is carried out in a device containing a single metal microreactor built using the micromilling technique and a ethyl esters yield of 92.56% at a residence time of 46.56s was achieved. The other experimental analysis is done in a device composed of multiple metal microreactors coupled to …
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Coordination Geometries in Metallobundles Enforcing Oxidative and Hydrolytic Catalysis and Designing Biomaterials for Use As Antimicrobials
… observed in much grander O2-utilizing metalloproteins such as radical-generating ribonucleotide reductases and catalases. One notable family of de novo proteins is the Due Ferri or DF series of four-helix bundles providing a dinuclear site for metal incorporation and are amenable for …
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A CALORIMETRIC STUDY OF LIGHT HYDROCARBON ADSORPTION ON METAL-ORGANIC FRAMEWORKS
The effect of metal-organic framework (MOF) structural modifications on C2 hydrocarbon gas adsorption was studied. Two main MOF structures were modified and tested: UiO-66, which has two types of pores in the structure and can support various functional groups on the organic linker, and MOF-74, …
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STM, LEED and photoemission studies of the Sn/Cu(100) surface alloys
… primary focus of this thesis is the study of bimetallic ordered surface alloys. Cu-based bimetallic catalysts show very useful properties, particularly in respect to their industrial applications, such as metal selectivity, structural stability and catalytic activity in comparison to their …
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Solving Series Resistance Problems In GaSb Thermophotovoltaics with Graphene and Other Approaches
… short circuit current. An additional layer of metal was added to the reduce the deleterious resistance characteristics, and it was found to lower the series resistance down to a 4 Ω average across almost all of the devices. The average JSC for all of these devices increased to over 30 mA/cm2, …
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Redox-active ligand uranium complexes for approaches to multi-electron chemistry
<p>While transition metal complexes are known to participate in multi-electron redox chemistry to facilitate important organometallic transformations, actinides, due to their low redox potentials, have a propensity to perform single electron chemistry. Because of its highly reducing nature, the …
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Determination of metal quality of aluminium and its alloys
… been widely accepted, because there has been no single metal quality test that has been able to resolve features that are only nanometres, or sometimes micrometres, in thickness. In the past, porosity has usually been held solely responsible for most failures in aluminium alloys, and hydrogen has …
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Exploiting cooperative effects in s-Block organometallics for new applications in synthesis and catalysis
Focussing on group 1 and group 2 metals, this thesis advances the use of polar organometallics in catalysis, in particular intermolecular hydroamination processes; as well as other key stoichiometric transformations, namely deprotonative metallation and C-F bond activation.Group 1 alkyl compounds …
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Fundamental Understanding of Palladium-Based Catalysts: From Pyrene-Based COFs to Size-Controlled Bimetallic Nanostructures
The catalytic properties of single atoms (SAs) have attracted growing attention due to their unique electronic characteristics and their ability to maximize atomic efficiency compared to nanoparticles. As particle size decreases, the coordination environment around the metal atoms becomes …
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Desulphurisation of iron-carbon melts.
… Techniques were developed to introduce a single metal droplet into a liquid slag contained in an iron crucible. Reaction was terminated by quenching the droplet and slag, the former being analysed to determine sulphur concentration. Equivalent techniques were employed to monitor …
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Environmentally friendly baths for Cu-Sn co-electrodeposition: cyanide-free aqueous bath and deep eutectic solvents
… a result, this work started from deposition of single metal for better understanding of behaviors of mixtures between choline chloride and ethylene glycol or urea. Successful deposition of copper-tin alloys can be carried out under warmed conditions and variation on film composition can be …
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