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.
Results
Showing 1 to 20 of 103 for “"earth-abundant"”.
-
Earth Abundant Catalysts for Water Electrolysis at Low Overpotentials
… from renewable feedstocks is an exigency for Earth’s inhabitants to avoid the worsening of the catastrophic effects of anthropogenic climate change. Water splitting is a technology that is hundreds of years old, yet it has still not become commercially relevant due to high capital costs and …
-
Development of Earth Abundant Metal-Catalyzed Reactions to Construct Heterocycles
N-Heterocyclic scaffolds are ubiquitous in natural and pharmaceutical compounds, and their significance has driven extensive efforts toward developing efficient synthetic methods. Our group focused on efficiently triggering C–N bond formation via different reactive nitroso intermediates. My …
-
Earth-Abundant Thin-Film Devices for Photovoltaic and Electrochemical Applications
… for next-generation PV devices because of their earth-abundant constituents and ability to be scaled up with roll-to-roll processing. This work identifies critical processing parameters during CZTS solution deposition to prevent the formation of amorphous carbon nitride impurity phases which ruin …
-
A Radical Approach to Photochemical Transformations Using Earth-Abundant Metals
… (3d metals), which are significantly more earth-abundant than noble metals (e.g. Ir, Ru) used in traditional photoredox catalysts, presenting a low cost and sustainable alternative to noble metal photocatalysis. Apart from our exploration in LMCT catalysis, we also demonstrated radical …
-
Nanocrystal Synthesis and Thin Film Formation for Earth Abundant Photovoltaics
… of solar cells from nanocrystal inks comprising earth abundant elements represents a scalable and sustainable photovoltaic technology with the potential to meet the global demand for electricity. Solar cells with Cu2ZnSn(S,Se)¬4¬ (CZTSSe) absorber layers are of particular interest due to the high …
-
Reductive conversion of lignin to aromatic chemicals with earth abundant catalysts
The viability of lignocellulosic biomass as a feedstock for chemicals hinges on the successful utilization of the lignin. Lignin, which comprises 15-30 wt% of biomass, is an amorphous polymer composed of multiple phenolic monomers. Lignin polymerization occurs through an uncontrolled radical …
-
Design of active, stable, and earth-abundant acidic oxygen evolution catalysts
… and active OER catalysts comprised of earth-abundant elements from cobalt and nickel oxides operate in neutral and alkaline pH. These same systems corrode under acidic conditions, which is a regime important for electrolyzers and photoelectrochemical devices as well as for fundamental …
-
TOWARDS SUSTAINABLE CATALYSIS: DESIGN OF EARTH-ABUNDANT METAL COMPLEXES FOR WASTE VALORIZATION
The thesis describes the work done during three years of PhD regarding sustainable metodologies in homogeneous catalysis. First chapter: selective oxidation of alcohols using iron(III) pyclen ligand complexes as catalyst and hydrogen peroxide as oxidant. Application and mechanistic insights. …
-
EARTH-ABUNDANT METAL CHALCOGENIDES: SYNTHESIS, INTERFACE MODIFICATION, AND APPLICATIONS IN ENERGY CONVERSION DEVICES
… solution methods to synthesize non-toxic earth-abundant MC materials Cu2ZnSnS¬4 (CZTS) and Sb2S3 for thin-film solar cells and thermoelectric generator. By tweaking the surface chemistry of CZTS nanocrystals, we fabricated CZTS thin-films with high carrier mobility and large grain size …
-
Earth-Abundant Metal Complexes Binding N-Heterocyclic Carbene-Based Ligands for the Photocatalytic Carbon Dioxide Reduction Reaction
… process. However, a robust and efficient earth-abundant transition metal-based photocatalyst for CO2 reduction reaction is needed to achieve this goal. N-heterocylic carbene (NHC) ligands have been used widely in organometallic catalyst applications owing to its strong sigma-donor …
-
Development & characterization of bio-inspired earth-abundant metal systems and extreme ultraviolet spectroscopy of precious metal photocatalysts
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-08-01
-
Novel Earth Abundant Catalytic Materials for Abatement of Atmospheric Methane Sources, and Evaluation of Agricultural Deployment Environments
… thesis, I propose the use of a bio-inspired, earth-abundant, heterogeneous catalysts as a novel tool for atmospheric and emissions-based methane abatement. Copper zeolites were characterized for their ability to convert low levels of methane, continuously, at low temperatures, for moderate …
-
Solar water splitting for hydrogen production: development of photocatalysts based on earth abundant and biocompatible materials (TiO2 and Fe2O3)
… resource, providing more energy in 1 hour to the earth than all of the energy consumed by humans in an entire year. The principal problem related to solar energy use is its intermittency. Collecting and storing solar energy in chemical bonds (solar fuel), as nature accomplishes through …
-
Sharing the Burden of Reactivity: Synthesis, Characterization, and Reactivity of Phosphino-Alkoxide First-Row Transition Metal Complexes
… of covalent bonds of the substrate with earth-abundant catalysts. Through careful control of the ligand environment and metal selection, specific substrates can be targeted with precision. This dissertation describes the synthesis of complexes featuring earth-abundant 3d transition metals …
-
Magnesium nanoplasmonics: synthesis, characterisation, and applications
… LSPRs, but there is growing interest in earth-abundant alternatives that offer potentially different properties at a much lower cost. This thesis focuses on establishing metallic Mg as a viable plasmonic material. First, synthetic routes for Mg nanoparticles are explored. Seed-mediated …
-
Computationally-Derived Design Principles for Water Oxidation Catalysts
… this level of activity while instead utilizing earth-abundant metals, tools need to be developed which leverage knowledge from computation and from existing systems to accelerate catalyst design. This thesis focuses on developing such tools for homogeneous transition metal complexes (TMCs), …
-
Effect of iron content on electrodeposited Fe-MnOx catalysts for water oxidation
MnOx materials are earth-abundant and known to be efficient catalysts for the water oxidation reaction (WOR). I present the exploration of an optimal method of cathodically electrodepositing MnOx catalysts on an FTO substrate, allowing for quick synthesis and a homogeneous coverage of the …
-
Advancing plastics reutilization via catalytic hydroconversion
… on BEA zeolite (Ni/BEA) catalysts as an earth-abundant metal-based alternative for polyolefin hydrocracking. We demonstrate Ni/BEA is optimal for naphtha generation, with productivities that surpass Pt- and other earth-abundant metal-based catalysts. We deduce Ni/BEA operates in a …
-
Designing Electrocatalysts for the Production and Oxidation of Liquid Fuels
… would be used to electrochemically convert earth-abundant molecules into value-added chemical or fuels. These generated products could then be utilized as feedstocks in industrial applications or as a fuel source to generate electricity when needed by transforming back into their …
Page 1 of 6