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 37 for “"electrolyzers"”.
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Innovative electrolyzers for carbon capture and valorization
L'abstract è presente nell'allegato / the abstract is in the attachment
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ELECTROCATALYSTS AND SUPPORTS FOR POLYMER FUEL CELLS AND ELECTROLYZERS
… implementing these technologies is the cost of electrolyzers/fuel cells along with the overhaul of our current energy infrastructure. To mitigate the cost of the electrolyzers and fuel cells, cheaper, more efficient catalysts need to be discovered. In this work, we use high-throughput methods to …
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Mass Transfer in Parallel Plate Electrolyzers With Liquid-Liquid Flow
The mass transfer enhancement of a two-phase flow system containing reactive dispersed droplets has been studied on a vertical planar electrode. A static mixer was used to generate organic droplets dispersed in the continuous aqueous solution.
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Electrochemical oxidation and reduction of 5-hydroxymethylfurfural in alkaline water electrolyzers
… wind turbines, solar parks, and water turbines. Electrolyzers, which can store electricity from renewable energy in molecules such as hydrogen, but also have the potential to use renewable energy to replace petrochemical-based large-scale processes for synthesizing various chemicals, will play a …
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Investigation of Flow-by Porous Electrodes With Two-Phase Electrolyzers (Mass Transfer, Drops, Extraction)
Solubilizing reactants and products in electrolytes of high conductivity is an important aspect of industrial systems such as flow-through batteries and electro-organic syntheses. Two-phase processes appear to be promising because they can be used to meet competing requirements for high mass …
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Modeling process dynamics in membrane-electrolyte-assemblies of chloralkali electrolyzers considering steric and hydration effects
The dynamic operation of the chloralkali electrolyzer has been considered as one of the solution for balancing the supply-demand fluctuation in the electricity grid. This opportunity becomes a motivation to study the complex transient behaviors of the electrolyzer caused by linked multiscale …
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An experimental and modelling approach to study the performance and degradation of low temperature electrolyzers
L'abstract è presente nell'allegato / the abstract is in the attachment
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FIRST ROW TRANSITION METAL OXIDES AS ELECTROCATALYSTS FOR ANION EXCHANGE MEMBRANE FUEL CELLS AND ELECTROLYZERS
… For the transportation sector, fuel cells and electrolyzers represent excellent alternatives to internal combustion engines and gasoline. Electrolyzers can use electricity from renewables such as wind or solar to split water into its elemental components and produce green hydrogen, which can be …
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Materials design and discovery of catalysts for small molecule conversion
… storage and conversion devices like fuel cells, electrolyzers, and metal-air batteries. However, the field of (electro)catalysis has been historically hindered by a lack of guiding principles for materials selection and design, especially for increasingly complex materials systems such as oxides. …
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Understanding the active sites and reaction mechanism of water oxidation on metal oxides
… to hydrogen using proton exchange membrane water electrolyzers, which are amenable to integration with solar devices due to their high performance under fluctuating power input. Water oxidation to molecular oxygen is the most energy intensive part of the water splitting process, limiting the …
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Mechanistic Underpinnings of Efficient Chemical-to-Electrical Energy Interconversion in Bipolar Membranes
… of electrochemical devices such as water and CO₂ electrolyzers, fuel cells, redox flow batteries, and electrodialyzers that operate with a pH gradient. This in turn has allowed the independent optimization of cathode and anode catalysts, and unlocked new operational modalities such as in operando …
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Ruthenium-Chromium Oxide Aerogels Oxygen Evolution Electrocatalysts: Structure, Activity and Stability
… energy in proton exchange membrane (PEM) water electrolyzers. Catalysts with enhanced activity and stability are needed for the anodic oxygen evolution reaction (OER) that generate hydrogen and oxygen from water. Ruthenium-oxide based catalysts have shown the highest reported activities of any …
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Optimizing energy conversion efficiency of a proton exchange membrane green hydrogen generation system while incorporating balance of plant modeling
… that are used to produce green hydrogen are electrolyzers and the most prominent type of electrolyzer today is the proton exchange membrane (PEM) electrolyzer. Most PEM systems are designed for continuous operation with a constant input of electricity. When PEM electrolyzers are coupled with …
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Reference Electrode Development in Polymer Electrolyte Membrane (PEM) Electrolyzer Assembly for Novel Investigation of Electrodes
Polymer electrolyte membrane electrolyzers (PEMEs) are the key to integrating renewable energy generation with energy storage to reduce greenhouse gas emissions that contribute to global climate change. The commercialization of large PEME systems, however, requires improvements to electrode design, …
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Techno-economic optimization and environmental life cycle assessment of microgrids using genetic algorithm and artificial neural networks
… batteries, biodiesel generators, fuel cells, electrolyzers and H<sub>2</sub> tanks. The second paper is an extension of first paper and utilizes Artificial Neural Networks to predict energy demand while also incorporating social costs. With an aim to incorporate LCA methodology, the third …
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Rational design strategies for oxide oxygen evolution electrocatalysts
… to enabling solar fuels, fuel cells, electrolyzers, and metal-air batteries. Non-precious transition metal oxides show promise as cost-effective materials in such devices. Leveraging the wealth of solid-state physics understanding developed for this class of materials in the past few …
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The Role for Electricity Transmission in Net-Zero Energy Systems: A Spatially Resolved Analysis of the Continental US
… with the hydrogen supply chain, the use of electrolyzers increase demand for electricity from VRE resources further. NETs, specifically BECCS, allow for the inclusion of natural gas in the generation mix while adhering to net-zero emissions targets. This approach helps mitigate the need for …
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Microscopic and spectroscopic characterization of fuel cell catalyst layer materials and interfaces
… systems such as alkaline fuel cells, H2O and CO2 electrolyzers.
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Activating oxygen chemistry on metal and metal oxides: design principles of electrochemical catalysts
… membrane fuel cells (PEMFCs), water splitting electrolyzers, and rechargeable metal-air batteries, which hampers the development of new-energy applications such as electric vehicles. To increase the energy efficiency of ORR and OER processes, various catalysts have been studied for oxygen …
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Design of active, stable, and earth-abundant acidic oxygen evolution catalysts
… conditions, which is a regime important for electrolyzers and photoelectrochemical devices as well as for fundamental mechanistic studies. In this thesis, we iteratively design an active, stable, and earth-abundant acidic oxygen evolution catalyst through multiple generations. The first …
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