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 50 for “"carbon-electrodes"”.
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Designer Porous Carbon Electrodes for Redox Flow Batteries
Porous carbon electrodes play an important role in electrochemical systems by providing electrocatalytic sites to facilitate faradaic reactions, distributing reactants and products, and conducting electrons and heat. The microstructure and surface chemistry of such electrodes are of particular …
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Investigation of an alternative sulfonated silane in ceramic carbon electrodes for fuel cell applications
… great promise when using sulfonated ceramic carbon electrodes (CCEs) on the cathode of a PEMFC in low relative humidity (RH) environments though increased water retention. Through the sol-gel method the use of tetraethylorthosilicate (TEOS) and a small amount of 3-(trihydroxysilyl) propane-1- …
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Capacitive deionization performance of bi-tortuous activated carbon electrodes coated with asymmetrically charged polyelectrolytes
… desalination technology in which porous carbon electrodes are polarized to reversibly store ions from a brackish water feed in electrical double layers in the electrodes. CDI is an attractive alternative to commonly used brackish water desalination technologies like reverse osmosis and …
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Electrochemical techniques for detection of Tnt and other explosives using disposable screen-printed carbon electrodes
… of clean samples; Screen-printed thick film electrodes are examined as voltammetric sensors for measurement of 2,4,6-Trinitrotoluene (TNT), and Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX). The square wave voltammetric (SWV) scan technique can be used to measure TNT and RDX in as little as …
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Understanding the carbon morphology in sulfonated-silica ceramic carbon electrodes for the PEM fuel cell device
… linked to the use of Nafion® and the amount of carbon in the catalyst. In this work, 40 wt% Pt/C catalyst is used to obtain total electrode loadings as low as 0.2 mgPt cm-2, with the hypothesis of increased energy density while reducing catalyst layer thickness. This catalyst is used in …
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The influence of surface tension on F2-Bubble Morphology at detachment from carbon electrodes in KF-2HF molten fluoride salt
… were generated electrochemically on amorphous carbon electrodes in KF-2HF molten salt to study the effect of surface tension (ϒ) on the profile of a bubble. F2 is used for the purification and enrichment of fuel in the nuclear industry. Its generation is energy-intensive because of electrical …
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In-Situ Resource Utilization of Pectin and Bosch Carbon for Energy Storage
… supercapacitor coin cells with various valorized carbon electrodes. As supercapacitors, the hydrogels exhibit excellent efficiency, long-term cycling stability, and robust thermal cycling characteristics. Furthermore, carbon produced as a byproduct of a wider system of In-Situ Resource Utilization …
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Electrolytic production of hydrogen peroxide
… alloy F-S-l, aluminum, lead and activated carbon electrodes in 5 N sodium hydroxide, 0.1018 N sodium hydroxide, and 0.01018 N potassium hydroxide, saturated ammonium chloride and 0.043 N phosphoric acid were studied.
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Biomolecular engineered sensors for diagnostic applications
… of the approach rest upon the development of carbon-loaded polycarbonate composite films. Their fabrication is described and the ease with which they can be modified and physically adapted is highlighted and critically evaluated. The response of the resulting sensors have been validated …
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Sonovoltammetric detection of cadmium (II) at mercury thin film electrodes
… stripping voltammety. Both platinum and glassy carbon electrodes were examined as support materials for the mercury film and the results were compared to a dialysis membrane-covered glassy carbon MFE. The platinum electrode behaved in an unusual manner and appeared to be greatly affected by the …
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Nuclear Magnetic Resonance Studies of Ion Adsorption in Supercapacitor Electrodes
… of ions at the interface between porous carbon electrodes and an electrolyte solution. The development of new electrode materials and electrolytes with improved performances is an active area of research today, yet there are relatively few studies of the molecular mechanisms of the charge …
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Environmental tuning of the reactivity of molecules confined to polarized interfaces
… site and the band structure of graphitic carbon electrodes or using this coupling as a tool to understand the reactivity of molecules confined to solid-liquid interfaces. Chapters two through four explore environmental contributions to porphyrin electrocatalysis.
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On the Impact of Electrode Properties and Their Design for Redox Flow Battery Performance
… for multiple redox chemistries. Porous electrodes are a prime target for improvement of system power to lower cost per kilowatt-hour, as they are responsible for multiple critical functions in the flow cell including providing surfaces for electrochemical reactions, distributing liquid …
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TRANSITION METAL COATINGS FOR ENERGY CONVERSION AND STORAGE; ELECTROCHEMICAL AND HIGH TEMPERATURE APPLICATIONS
… transition metal oxide and sulfide electrodes such as RuO2, IrO2, TiS2, and MoS2 exhibit rapid faradaic electron–transfer reactions combined with low resistance. The pseudocapacitance of RuO2 is about 720 F/g, and is 100 times greater than double-layer capacitance of activated carbon …
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Understanding and Optimising Carbon Disorder for High-Performance Supercapacitors
… density and exceptiona durability. Nanoporous carbons, especially activated carbons, are the cheapest and most widely used electrode materials in commercial EDLCs. However, their structural complexity has made it challenging to determine the key structural factors that determine capacitive …
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Dynamic measurement and control of electrochemical interfaces for energy storage and conversion
… combatting climate change, but to move to a true carbon-neutral or carbon-negative society, this energy needs to be stored and converted as well. Many next-generation energy technologies rely on electrochemistry to accomplish this. These technologies rely on electrodes to pass current through a …
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