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 36 for “"electrochemical process"”.
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Impact of electrochemical process on the degradation mechanisms of AlGaN/GaN HEMTs
… structural degradation is explained by an electrochemical cell formed at the gate edge where gate metal, the II-N surface and the passivation layer meet. Moreover, the permanent decrease of the drain current is directly linked with the formation of the surface pits, while the permanent …
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Aluminum/aluminum oxide structured microplasma devices: Paschen's Law and applications
… be fabricated by sequences of inexpensive wet electrochemical processes and provide an attractive tool to study plasma physics by modifying the device geometry as desired. A wet electrochemical process, used for fabricating microscale cavities and developed at the Laboratory for Optical Physics …
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Electrodeposition of conducting polymer fibers
… and stability in ambient conditions. A one step electrochemical process for growing macroscopic conducting polymer fibers previously described in Li et al's article (Science, 1993) was used to grow PPy fibers. Based on a schematic of the electrochemical flow cell used in the electrodeposition …
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ΜΕΛΕΤΗ ΤΟΥ ΜΗΧΑΝΙΣΜΟΥ ΤΗΣ ΗΛΕΚΤΡΟΧΗΜΙΚΗΣ ΑΝΑΓΩΓΗΣ ΤΟΥ ΑΛΟΥΜΙΝΙΟΥ ΑΠΟ ΤΗΓΜΑΤΑ ΧΛΩΡΙΟΥΧΩΝ ΚΑΙ ΧΛΩΡΟΦΘΟΡΙΟΥΧΩΝ ΑΛΑΤΩΝ ΣΤΟΥΣ 450 C
… KINETIC OF THE MECHANISM OF THE ALUMINIUM IONS ELECTROCHEMICAL REDUCTION FROM THE MOLTEN ELECTROLYTES NACL-KCL- LICL AND NACL-KCL- LICL-LIF AT 450 C, CONTAINING ABOUT 10-4 MOL/CM3. ALCL3, WAS STUDIED ON SILVER AND PLATINUM ELECTRODES. FOR THIS PURPOSE THE METHODS OF LINEAR SWEEP VOLTAMMETRY, …
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A layered sodium titanate as promising anode material for sodium ion batteries
… Although some cathode materials with desirable electrochemical properties have been proposed, it's quite challenging to develop suitable anode materials with high energy density and good cyclability for sodium ion batteries. Herein, we report a layered material, 03-NaTiO2, that delivers …
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Smart-phone-based electrochemical sensor for environmental applications
… microelectronic ionic sensor that performs electrochemical measurement by using audio jack of a smart phone. This platform was used to measure nitrate concentration using a few microliter liquid samples on field along with providing geospatial map locations through a wireless network. This …
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An electrochemical reduction process for the recovery of copper powder from a refinery effluent stream
… gone into the development of a feed pretreatment process for the concentrate refined at Anglo American Platinum's Precious Metals Refiners (PMR). Such a process has the potential to significantly simplify the downstream refining process and reduce the number of unit processes required for …
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Production of Renewable Diesel Fuel via Hofer-Moest Decarboxylation of Free Fatty Acids
… worse oxidative stability. An advantage of this electrochemical process is the robustness of feedstocks that can be used, which includes algae oils, high FFA wastes such as brown and yellow grease, and biodiesel waste FFA salts.
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Permeability Spectra of Electrodeposited CoFe Film for Inductor Applications
… connections. The implementation of FIVRs in processors has significantly improved power efficiency. To fabricate FIVRs, the development of miniaturized inductors is vital. Traditional materials like ferrites are unsuitable due to their low stability frequency. Thin film alloy deposition …
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Filiform corrosion on organic coated steel
… of FFC on steel substrates, the causes, and the electrochemical process. This work systematically explores the electrochemical underpinnings of FFC, shedding light on the influencing factors and the complex interactions within the metal-paint interface. Advanced electrochemical methods are …
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Finite Element Modeling of Steel Corrosion in Concrete Structures
… Chloride- induced corrosion is a complicated electrochemical process which is affected by heat transfer, moisture flow and transport of chemical species through the concrete pore network. Reliable and robust analytical tools are required to allow multi-physics simulations of steel corrosion. …
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Modified Nafion membranes for hydrogen production in Cu-Cl thermochemical cycle
… heat. One step in the Cu- Cl cycle employs an electrochemical process where Cu(I) is oxidized to Cu(II) at the anode and hydrogen is generated at the cathode. The electrochemical cell used is similar to a water electrolysis cell and employs a membrane electrode assembly (MEA) that utilizes a …
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ELECTROCHEMICAL METHODS FOR THE SUSTAINABLE RECOVERY OF GADOLINIUM FROM MRI CONTRAST AGENTS AND FOR THE FABRICATION OF GADOLINIUM-RICH NANOPARTICLES.
… To address this issue, this work explores two electrochemical strategies aimed at the sustainable recovery and reuse of Gd: a degradation method for GBCAs in various matrices, and the synthesis of Gd-containing nanoparticles starting from GBCA model compounds. In the first approach, …
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Study of Ruthenium and Ruthenium Oxide's Electrochemical Properties and Application as a Copper Diffusion Barrier
… we investigated ruthenium and ruthenium oxide electrochemical properties and the application as a copper diffusion barrier. Cu under potential deposition (UPD) on the RuOx formed electrochemically was first observed. Strong binding interaction, manifesting by the observed Cu UPD process, exists …
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Surface-Enhanced Spectroelectrochemistry using Synchrotron Infrared Radiation
Electrochemical reactions are inherently heterogeneous, occurring at the interface between a solid electrode and an electrolyte solution. Therefore, detailed mechanistic understanding requires the electrode/solution interface (ESI) to be interrogated. Doing so with spectroelectrochemical techniques …
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Fabrication of Catalyst Coated Membranes by Ultrasonic Spray for Proton Exchange Membrane Water Electrolysers
… and industrial sectors. GH is generated via the electrochemical process of water splitting, utilising excess renewable energy sources such as solar and wind, thus serving as a sustainable means of energy storage. The production of GH can be done in a proton exchange membrane water electrolyser …
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Electropolishing of Niobium in Sulfuric Acid-Methanol Electrolytes: Development of Hydrofluoric Acid-Free Electrolytes
… electrolytes is the currently accepted treatment process. The presence of HF is necessary for the removal of the passive oxide surface film formed in aqueous electrolytes. But HF is hazardous and must be contained without human exposure and eliminated in an environmentally appropriate manner. In …
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Electrochemical Routes for Capture and Utilization of CO2
… technologies. This thesis advances integrated electrochemical and materials-based strategies for CO2 capture, activation, and conversion, with particular emphasis on reducing regeneration energy penalties, enhancing reaction kinetics, and enabling operation under dilute CO2 feed conditions …
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Ion sequestration particles for naval anticorrosion coatings
<p>Corrosion is the electrochemical process of a metal returning to its lower energy state, the metal oxide. The cost of corrosion is difficult to estimate. One area particularly susceptible to corrosion problems with high maintenance costs is that of the 20,000 tanks existent in the US Naval …
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Development of seawater electrolysis with low-cost membranes for sustainable cement production and pretreatment
Membrane electrolysis is an electrochemical process that uses ion-exchange membranes (IEMs) to selectively migrate ions and recover valuable resources from seawater. Despite its advantages, its application in large-scale industrial processes like cement production has been limited by the high costs …
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