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 26 for “"platinum electrodes"”.
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Mass spectrometric analysis of surface adsorbed oxygen on platinum electrodes.
Massachusetts Institute of Technology. Dept. of Chemistry. Thesis. 1969. Ph.D.
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Electrochemical and spectroscopic interfacial investigations of small organic molecule electrooxidation on platinum electrodes
… oxidation of formic acid and ethanol to CO2 on platinum electrodes have been examined. The adsorbed carbon monoxide intermediate continues to be the cause for a decrease in efficiency and activity for platinum electrodes and is the leading surface poison (intermediate) in the most common …
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Influence of solvent on the infrared spectrum of carbon monoxide adsorbed on platinum electrodes
The behavior of adsorbed carbon monoxide on platinum was studied using potential difference infrared spectroscopy. Three solvents and three electrolytes were chosen, and data gathered at both high and low adsorbate coverages. The rate of change of IR peak position with applied potential, the Stark …
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Lateral modification and the organization of mixed adlattices on polycrystalline and single crystal platinum electrodes
… of carbon monoxide electrosorbed on platinum by the coadsorption of a variety of inorganic and organic compounds (surface lateral modifiers) was probed using linear scan voltammetry. The shift in the peak potential for the CO electrooxidation reaction induced by the presence of the …
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Microfabrication methods to improve the kinetics of the yttria stabilized zirconia -- platinum -- oxygen electrode
… (>800°C). One reason for this is because the electrodes have very poor (and poorly understood) kinetics. The work described in this dissertation involves the microfabrication of model systems with triple phase boundary lengths that varied over an order of magnitude to systematically quantify …
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Amperometric responses of some biosensor-related analytes at electrodes coated with semipermeable polymer layers: a comparative study /
… ascorbate and paracetamol have been studied at platinum electrodes coated with Nafion or electropolymerized polypyrrole and poly(o-phenylenediamine) and polyaniline (PANI) layers. Among the three layers studied, the Nafion layer shows superior properties. It possesses high permeability to …
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Low platinum loading electrospun electrodes for proton exchange membrane fuel cells
… carbon nanofiber supports for sputtered platinum catalyst in proton exchange membrane fuel cells. The performance of the sputtered nanofiber supports was similar to that of sputtered commercial gas diffusion layers in single cell fuel cell tests. However, sputtered platinum electrodes …
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ΜΕΛΕΤΗ ΤΟΥ ΜΗΧΑΝΙΣΜΟΥ ΤΗΣ ΗΛΕΚΤΡΟΧΗΜΙΚΗΣ ΑΝΑΓΩΓΗΣ ΤΟΥ ΑΛΟΥΜΙΝΙΟΥ ΑΠΟ ΤΗΓΜΑΤΑ ΧΛΩΡΙΟΥΧΩΝ ΚΑΙ ΧΛΩΡΟΦΘΟΡΙΟΥΧΩΝ ΑΛΑΤΩΝ ΣΤΟΥΣ 450 C
… 10-4 MOL/CM3. ALCL3, WAS STUDIED ON SILVER AND PLATINUM ELECTRODES. FOR THIS PURPOSE THE METHODS OF LINEAR SWEEP VOLTAMMETRY, CHRONOPOTENTIOMETRYAND CHRONOAMPEROMETRY, AS WELL AS THE CONVOLUTIONAL ANALYSIS, WERE USED. MOREOVER A SIMPLE ANALYTICAL METHOD PERMITTING THE SOLUTION OF THE SYSTEM OF …
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Ruthenium polypyridyl complexes with long aliphatic chains; photophysics, interfacial assembly and cell imaging
… Ru(dpp)2(x-ATAP)](PF6)2 complexes were formed on platinum electrodes and these monolayers were characterized electrochemically. These monolayers were found to be somewhat unstable when analysed electrochemically even when backfilled with an appropriate length alkanethiol. Attempts to study the …
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Effects of Ventromedial Hypothalamic Lesions on Food-Reinforced Fixed Ratio Responding
… Rats with ventromedial lesions made with steel electrodes showed a decrease relative to controls in lever pressing on a fixed ratio schedule. This effect was also seen in rats which had extensive pretraining on the fixed ratio task. Nonpretrained rats with lesions made with platinum electrodes …
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Development, Analysis, and Comparison of Electromechanical Properties and Electrode Morphology of Ionic Polymer Metal Composites
… types of IPMC. Combining the ionic polymer with platinum electrodes, gold sputter coated electrodes and multi-walled carbon nanotube Bucky paper electrodes to create enhanced IPMCs, comparative analysis of different manufacturing methodologies discussing the electrode morphology using scanning …
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Investigations of the optoelectronic behaviour of novel phthalocyanine Langmuir-Blodgett films.
… plated glass, and on quartz with interdigitated platinum electrodes. Optical absorption spectra are obtained for the materials, and the linear relation between the absorption intensity and thickness confirmed. The variation in optical absorption with polarisation and angle of incidence is used to …
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Electroactive Conjugated Polymers as Charge-Transport Materials for Optoelectronic Thin-Film Devices
… were studied. The polymers were deposited on platinum electrodes or ITO-coated glass substrates by potentiodynamic electro-polymerisation of the corresponding monomeric precursor molecules. The electro-chemical and photophysical properties of the triarylborane monomers were studied in detail …
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Evaluation of microbial dynamics on low-sodium cooked bologna under different packaging conditions
… values were collected over time using platinum electrodes placed on top of, and in between bologna slices. While the redox values obtained were, in general, consistent with increasing bacterial cell numbers, issues of reproducibility and consistency were evident. The second study …
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A data acquisition and analysis system for use with multi-electrode arrays in the development of a retinal prosthesis for degenerative retinal diseases
… substrate, incorporate 16 extremely small platinum electrodes of diameter 5 microns which are signifcantly smaller than those used by other groups. Using the intact frog retina as an animal model, it has been shown that it is possible to record responses from discrete populations of retinal …
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Electrolytic conductances and related properties of solutions of some acids and salts in acetone
… measurements made using two platinised electrodes are, in some degree, liable to errors due to polarization, end effects and the state of the electrode surfaces. Several workers have also found errors due to the presence of finely divided platinum, such as adsorption of electrolyte on …
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Electrochemistry of systems containing aluminum phosphate dissolved in fused borate and phosphate mixtures
… ampco metal, armco iron, plumbago, graphite and platinum. Except for the graphite and the platinum, no material was suitable for use as a container. No aluminum was electrodeposited from the molten bath of 5Na₂O.10Li₂O.6B₂O₃ or from its solution with aluminum phosphate. Both aluminum anode and …
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Modeling and Data Analysis of Conductive Polymer Composite Sensors
… composite onto concentric spiral platinum electrodes on a silicon chip. The responses of the sensors were measured in dry air and at various vapor pressures of toluene and trichloroethylene. Three parameters in the conductivity model were determined by fitting the experimental …
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Microfluidic device and interfacial transport: application to biomolecules and nanostructures
… Soft-lithography was adopted to fabricate platinum electrodes, starting from platinum carbonyl precursor. I proposed a simple method to assemble these nanostructures in periodic arrays of microstripes, and form conductive electrodes with characteristic dimension of 600 nm. The conductivity …
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