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 15 of 15 for “"Electrochemical Characterisation"”.
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The Electrochemical Characterisation of Carbon-based Nanomaterials and their Application in the Detection of Heavy Metal Ions
In the work described in this thesis, electrochemical sensors are designed and investigated for their potential use in the detection of metal ions in aqueous solutions. Firstly, the use of carbon-based nanomaterials commonly used in the construction of electrochemical sensors; multiwalled carbon …
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Pioneering investigations into organometallic electrochemistry
… contains investigations into the synthesis and electrochemical properties of three diverse organometallic systems. In chapter 2, the first experimental determination of a an unsupported AuII-AuII bond is reported. The electrochemical characterisation of gold(III) hydride, hydroxide and chloride …
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Strategies to enhance extracellular electron transfer rates in wild-type cyanobacterium Synechococcus elongatus PCC7942 for photo-bioelectricity generation
… generation in biophotovoltaics (electrochemical cell). An initial cross comparison of the cyanobacterium Synechococcus elongatus PCC7942 against other exoelectrogenic cultures showed a hindered exoelectrogenic capacity. Nonetheless, in mediatorless biophotovoltaics, it …
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Performance and reliability studies of Atmospheric Plasma Spraying Raney nickel electrodes for alkaline electrolysers
… electrodes samples with strong emphasis on electrochemical characterisation and investigation of the degradation/deactivation mechanisms which occur within the electrodes structure. Nowadays research in alkaline electrolysis mainly aims to improve efficiency, extend durability and decrease …
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A Study of Novel Nitrogen-Containing Quinoidal Electrolytes for Redox Flow Batteries
… to be the most promising example, retaining its electrochemical activity after reacting with hydroxide ions, the resultant molecule showing greater stability and reacting at a lower potential. Using NMR and EPR spectroscopy, insights into the charge delocalisation and chemical reactions of the …
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The Formation of Metal Nanoparticle-Carbon Nanotube Composite Materials for the Non-enzymatic Detection of Glucose
… screen printed electrodes for the non-enzymatic electrochemical detection of glucose in PBS buffer at physiological pH. Electrochemical pre-treatments in sodium hydroxide and sulfuric acid provided films with improved sensitivity. These films were combined with a Nafion® membrane to improve …
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Development and characterisation of macro-disc and micro-band electrodes for electrochemical sensing applications
… potential next generation sensor platforms for electrochemical biosensor developments, specifically towards health monitoring applications. With increasing interest in the integration of miniaturised electrodes with minimally invasive and wearable devices, this thesis sought to explore …
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Electrochemical synthesis and characterisation of polypyrrole/chitosan films doped with molecular anions
… the polypyrrole-chitosan composite films by electrochemically polymerising pyrrole in a chitosan hydrogel network directly on an electrode surface. The electrochemical properties of the chitosan and the polypyrrole films differ, however the properties of polypyrrole are not adversely affected …
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Development of Novel Methodologies for the Electrodeposition of Polypyrrole-based Films in Controlled Morphologies with Potential Application in Nitrate Sensing.
In this thesis the novel electrochemical deposition of poly[N-(2-cyanoethyl)pyrrole] (PPyEtCN) into nanowire and microtube morphologies is reported. Cyclic and pulsed electrochemical techniques were employed to electrodeposit copper micro and nano particles at PPyEtCN and polypyrrole (PPy) …
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Improvement in Energy Conversion and Energy Storage Applications by Liquid Crystals and Carbon Nanoparticles
… flexible solid‐state carbon wire (CW)‐based electrochemical supercapacitors (ss‐CWECs) which exhibited high power density and ultra‐low cutoff frequency. Based on microscopy and electrochemical characterisation, the fundamental reaction mechanism in polyvinyl‐based electrolyte system was …
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Low PGM PtCo alloy catalysts for low loading Polymer Electrolyte Membrane Fuel Cells
… in especially transportation applications. The electrochemical conversion of energy is driven within membrane electrode assemblies (MEAs) over costly Pt catalyst which limits PEMFC cost viability. PtCo alloy catalysts are attractive alternatives to Pt, with similar or higher catalytic activity …
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Influence of particle size and morphology of Pt₃Co/C on the oxygen reduction reaction
… acid leaching. The catalysts were analysed using electrochemical characterisation techniques such as cyclic voltammetry, CO stripping voltammetry, rotating disk electrode and rotating ring disk electrode. Physical characterisation of the catalysts was also implemented. The techniques used were …
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Electrochemical Studies and Antimicrobial Properties of Synthesized Green Mediated Metal Oxide Nanoparticles
… were characterized spectroscopically and electrochemically. X-ray diffraction analysis (XRD) of the particles revealed the elemental components and nature of the synthesized particles. The XRD pattern spectrum obtained indicated a crystalline structure for the zinc oxide nanoparticles and …
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Evaluation of process parameters and membranes for SO2 electrolysis
… in an increase in manufacturing costs. Using electrochemical impedance spectroscopy at the optimised operating conditions, the MEA manufacturing process was optimised with respect to hot press pressure and time, while the effect of selected operating conditions was used to evaluate the charge …
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Optimising Recording & Stimulation Performance of Neuronal Microelectrode Arrays through Macroporous Conducting Polymer Modification
… and platinum, due to the subsequent reduction in electrochemical surface area. Strategies utilised to increase electrochemical surface area whilst maintaining the desired geometric area involve modification with rough, conductive electrode coatings, such as conducting polymers (CPs). This research …