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 45 for “"electrochemical reaction"”.
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Atomic and Electronic Structure of Complex Metal Oxides during Electrochemical Reaction with Lithium
… crystallographic shear compounds, with unique electrochemical properties, can be described as ordered, anion-deficient nonstoichiometric defect structures derived from ReO3. The lessons learned in niobia serve as a platform to identify other compounds with related structural motifs that …
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Molecular-Level Understanding of Electrochemical Reaction Mechanisms and Electrode Interphases in Metal-CFx Batteries
… limited molecular-level understanding of the electrochemical reaction mechanisms, how the materials are affected by radiation, and how the discharge products and electrode films and interfaces evolve with age. In addition, the origin of large overpotentials and possibility of rechargeability …
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Studies on the Control of Metal Passivation in the Electrochemical Tunnel Etching of Aluminum (Corrosion, Passivity, Pitting Potential, Aluminum)
… all tunnels at the equilibrium potential of an electrochemical reaction involving adsorption of chloride ions; this equilibrium potential was considered to be identical to the empirical pitting potential.
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Theoretical and Experimental Investigations on Microelectrodeposition Process
… standalone microstructures. In this process, an electrochemical reaction occurs on the electrode surface by applying an electric voltage, called overpotential. Different electrochemical practices were presented in the literature to obtain kinetic parameters of an electrochemical reaction but most …
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Species Chemistry and Electrochemical Separation in Molten Fluoride Salt
… chemistry and separation are necessarily needed. Electrochemical separation technique has been proposed as the online coolant clean-up method for FHR for removing some impurities from the salt such as lanthanides and corrosion products. The present research focuses on the electrochemical …
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Designing new electrode materials for energy devices by integrating ab initio computations with experiments
Utilization of Ni2+/Ni4+ double redox couple in electrochemical reactions has been tested as a way to gauge useful properties such as high capacity in electrode materials. The feasibility of a Ni2+/Ni4+ active redox couple is confirmed in a new layered electrode material, Lio.gNi045Ti5502. First …
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Electrochemical conversion of a fluorinated greenhouse gas using a lithium battery configuration
… ever increasing. In this thesis, a non-aqueous electrochemical platform with metal lithium (Li) as the anode and carbon as the cathode has been developed to convert the most potent greenhouse gas, sulfur hexafluoride (SF 6), into benign solids Li2S and LiF under room temperature conditions at an …
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Comparison of Cation-Anion Oxidizer Pairings in Electrically Controllable Solid Propellants
… oxidizers. Additionally, the thermochemical and electrochemical reaction mechanisms have not yet been fully defined. The research in this thesis explores the nitrate and perchlorate oxidizer families to compare their cation-anion relationships. Using these oxidizers, pseudo electrically …
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Understanding Electrode-Electrolyte Interfaces with Metal Dissolution and Redeposition Chemistry
… electrocatalysts, and batteries) with superior electrochemical performances. We firstly demonstrate the feasibility of resynthesizing the electrode surface chemistry and tuning the electrochemical reactions at the solid-liquid interface by selectively changing the electrolyte composition and …
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Developing Time-Resolved Synchrotron Infrared Spectroscopy for Spectroelectrochemical Measurements
This thesis details my work in developing spectroelectrochemical platforms utilizing synchrotron infrared radiation (SIR) and time-resolved FTIR to study the kinetics of electrochemical reactions on second to millisecond scale with high chemical sensitivity. It will cover development of …
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Manipulated Electrochemical Surface Reactions Induced By Oscillatory Electric Potentials on Metal Based Electrodes
… effort investigates the manipulation of surface electrochemical reactions induced by oscillating electric potentials on the surface of metal-based electrodes. Specifically, this research presents experimental data identifying modified electrochemical surface reactions caused by low magnitude …
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Transient Model of Heat,Mass,and Charge transfer as well as Electrochemistry in the Cathode Catalyst Layer of a PEMFC
… in the literature, considers the kinetics of the electrochemical reaction taking place at the platinum surface, the proton transport through the polymer agglomerates, and the oxygen and water transport within the pores as well as the membrane material of the catalyst layer. Due to the lower …
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The synthesis and characterization of sodium polysulfides for Na-S battery application
The limited understanding of the electrochemical mechanism of Na-S battery systems is a barrier to further improve the performance of the Na-S energy storage. The characterization of sodium polysulfides in the Na-S battery systems can offer insightful information to understand the electrochemical …
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Molecular Elucidation of Reaction Mechanisms in Aluminum & Lithium Metal Batteries by Solid-State NMR Spectroscopy and Electrochemical Methods
… capricious nature of the selenium reduction reaction. Lithium metal batteries are energy dense but suffer from deleterious side reactions that affect cycle life; currently these issues are mitigated by high-cost fluorinated solvents. Herein, electrochemical reaction mechanisms and chemical …
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Real-Time Monitoring of Short-Term Steel Corrosion in Cement and Soil
The corrosion process is defined as an electrochemical reaction that causes the deterioration and loss of material which adversely affects the critical properties of a material such as its microstructure, mechanical properties, and physical appearance. Corrosion of steel is of particular interest …
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Nonequilibrium thermodynamics of porous electrodes for lithium-ion batteries
… fundamental phenomena including transport and reactions in phase separating materials. First, we introduce a model of lithium transport and surface reactions within particles of graphite, which has phase separation and is the most common anode material in lithium-ion batteries. We demonstrate …
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Properties and biomedical applications of magnetic nanoparticles
… which plays important role on catalyzing the electrochemical reaction and powering Ni-MH batteries.</p>
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Mechanism of SPS acceleration in a PEG containing copper plating bath
… (SPS) which is believed to go through an electrochemical reaction to form sodium 3-mercapto-1-propanesulfonate (MPS), the effective accelerant. The accelerant is believed to operate by forcing the suppressor off the copper surface through competitive adsorption. The kinetics of MPS …
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Device Physics of Organic-Inorganic Hybrid Perovskite Semiconductors
… performance. The study begins by investigating electrochemical reactions occurring at the interface between the perovskite and gold metal electrode in perovskite single crystal FETs. By delaminating the electrodes and employing surface analytical techniques, it is revealed that an …
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