Дисертації з теми "Fundamentals of electrochemistry"
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Brownson, D. A. C. "Graphene electrochemistry : fundamentals through to electroanalytical applications." Thesis, Manchester Metropolitan University, 2013. http://e-space.mmu.ac.uk/315692/.
Повний текст джерелаMeng, Lingcong. "Thermo-electrochemistry of boron doped diamond from fundamentals to application." Thesis, University of Warwick, 2016. http://wrap.warwick.ac.uk/88929/.
Повний текст джерелаStevens, Michaela. "Fundamentals and Industrial Applications: Understanding First Row Transition Metal (Oxy)Hydroxides as Oxygen Evolution Reaction Catalysts." Thesis, University of Oregon, 2017. http://hdl.handle.net/1794/22633.
Повний текст джерела10000-01-01
Yoon, Dalsung. "Electrochemical Studies of Cerium and Uranium in LiCl-KCl Eutectic for Fundamentals of Pyroprocessing Technology." VCU Scholars Compass, 2016. http://scholarscompass.vcu.edu/etd/4602.
Повний текст джерелаFranco, Alejandro A. "A multiscale modeling framework for the transient analysis of PEM Fuel Cells - From the fundamentals to the engineering practice." Habilitation à diriger des recherches, Université Claude Bernard - Lyon I, 2010. http://tel.archives-ouvertes.fr/tel-00740967.
Повний текст джерелаBöhme, Solveig. "Fundamental Insights into the Electrochemistry of Tin Oxide in Lithium-Ion Batteries." Doctoral thesis, Uppsala universitet, Strukturkemi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-319428.
Повний текст джерелаPalencsar, Iozsef Attila. "SINGLE PARTICLE MICROELECTRODES AND MICROBATTERIES: FUNDAMENTAL STUDIES." Case Western Reserve University School of Graduate Studies / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=case1144340892.
Повний текст джерела周如琪 and Ruqi Zhou. "Fundamental and applied studies of the low melting 1-methyl-3-ethylimidazolium chloride system for lithium battery application." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B31243940.
Повний текст джерелаZhou, Ruqi. "Fundamental and applied studies of the low melting 1-methyl-3-ethylimidazolium chloride system for lithium battery application /." Hong Kong : University of Hong Kong, 2002. http://sunzi.lib.hku.hk/hkuto/record.jsp?B24728883.
Повний текст джерелаVoci, Silvia. "Electrochemiluminescence at different scales : From new fundamental properties to surface-confined microscopy." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0294.
Повний текст джерелаElectrogenerated chemiluminescence (ECL) is a light emission phenomenon initiated by electrochemically generated radical species, which then undergo a series of electron transfer reactions. It leads to the final generation of an excited state that radiatively decays to the ground state. In this work, my goal was to develop fundamental aspects of ECL as well as analytical applications at different scales. In the first part, two supramolecular systems are studied. The ECL performances of spirofluorene derivatives based on trigonal truxene-core structure are investigated, focusing on the role of the different functional groups on the ECL properties. Then a bispyrene scaffold mounted on a constrained polyether macrocycle displaying intense excimer fluorescence has been selected to study the circularly polarized ECL. We show for the first time that ECL can discriminate enantiomers. In the second part of the thesis, annihilation ECL is enhanced by exploiting nanogap amplification. Furthermore, ECL imaging experiments enabled to demonstrate the increase in the performances of a bipolar electrochemistry system by employing a solid-state micropore configuration. Finally, the first steps in the development of a new ECL-based microscopy are presented. Using a unique ECL mechanism, which involves short-lifetime electrogenerated radicals, surface-confinement of ECL microscopy was demonstrated by cellular membranes’ imaging. ECL microscopy applied to cells imaging was further improved by adding a permeabilization step during cells labeling procedure. Disposable transparent carbon nanotube-based electrodes inkjet-printed on classic microscope glass coverslips, were used to image cells in both reflection and transmission configurations
Silva, Leonardo Morais da. "Investigação da tecnologia eletroquímica para a produção de ozônio: aspectos fundamentais e aplicados." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/59/59138/tde-07072004-221143/.
Повний текст джерелаAfter a critical discussion about the environmental pollution resulted from the continuous consumption of the natural energy sources, is discussed in the Thesis the role of the ozone on reduction of the pollution burden released in the environment by different urban and industrial effluents. Different technologies available for the ozone production in the low and large scale are presented and discussed, given a special attention for the electrochemical ozone production, EOP, which is the issue under investigation in the experimental section of the Thesis. The experiments were separated in fundamentals, which comprises the investigation of EOP at PbO2 and IrO2+Ta2O5 electrodes, in different conditions of the temperature and composition of the electrolyte, and applied studies, where is proposed and characterised a reactor for EOP having a capacity of up to 100 A. In the fundamental section one proposed a new electrochemical methodology for characterisation of porous/rugged electrodes, which is based on a combined analysis of the intensive and extensive surface parameters. From the kinetic data it was proposed a electrode mechanism representative of the simultaneous production of oxygen and ozone, which makes possible to analyse the EOP current efficiency considering the surface coverage by the oxygenated reaction intermediates. The characterisation of the electrochemical reactor (prototype #1), which was constructed using a planar perforated PbO2 as anode and a solid polymer electrolyte (Nafion 117) as separator of the cathodic and anodic compartments, revealed that EOP is a promising alternative technology to the conventional corona process used in the ozone generation in the gaseous phase. P.S. For more details about the present Thesis in a English version see references extracted from this contribution already cited as a header in the main chapters.
Silva, Roberval Alves da. "Estudos eletroquímicos fundamentais para a detecção de fenol em interfaces do tipo petróleo/água." reponame:Repositório Institucional da UFABC, 2015.
Знайти повний текст джерелаDissertação (mestrado) - Universidade Federal do ABC. Programa de Pós-Graduação em Ciência e Tecnologia/Química, 2015.
O presente trabalho é referente à utilização de técnicas eletroanalíticas diretamente na interface formada entre dois líquidos imiscíveis. Esta nova metodologia de trabalho está em pleno desenvolvimento em nosso grupo de pesquisa, apresentando resultados promissores em diversas vertentes. De maneira específica neste projeto, os estudos foram realizados em fase aquosa, constituída ora por uma solução de NaCl 1x10-3 mol L-1, ora por água do mar, bem como em fase oleosa, aqui representada pelo petróleo bruto. Utilizou-se o eletrodo impresso de carbono como ferramenta de trabalho, aplicando-se técnicas eletroanalíticas, tais como a voltametria cíclica e a voltametria de onda quadrada. Contaminou-se artificialmente o petróleo com algumas moléculas-modelo, em particular o fenol e o cicloexano. Para iniciar os experimentos, verificou-se a possibilidade de obtenção das respostas de oxidação ou redução das moléculas a partir da técnica de voltametria cíclica, utilizando nesta etapa o NaCl 1x10-3 mol L-1 como eletrólito suporte. Em seguida, estudaram-se os mesmos sistemas por voltametria de onda quadrada, técnica esta mais sensível e adequada para fins analíticos. Resultados obtidos mostraram ser possível realizar a caracterização de moléculas introduzidas artificialmente à fase petróleo. Foram satisfatórios nos experimentos realizados neste trabalho a obtenção de dados que permitiram se obter voltamogramas para melhor análise e compreensão dos fenômenos de oxidação e redução das moléculas estudadas. Para tanto, foi utilizando como ferramenta principal as técnicas eletroanalíticas. Ainda, houve a possibilidade de se determinar o tempo de saturação do eletrodo impresso de carbono, na área interfacial petróleo/água. Deste trabalho qualitativo, foi possível concluir que todas as moléculas propostas neste projeto foram detectadas com êxito, ou seja, a técnica proposta em interfaces foi eficiente para a finalidade proposta. Trabalhos futuros serão necessários para refinar a metodologia e aplicar o sistema em amostras reais.
This work describes the use of a new electrochemical technique applied directly at the interface between two immiscible liquids. This new methodology is now been developed in our group and promising results were found in different research lines. More specifically, the studies in this project were carried out in aqueous support electrolyte solution constituted by a home-made 1 x 10-3 NaCl solution and also constituted by natural sea salt water. The organic phase was constituted by crude oil. A carbon screen-printed electrode was used as the main tool in this work. Cyclic Voltammetry (CV) and Square Wave Voltammetry (SWV) were used as electrochemical techniques. Portions of crude oil were contaminated with model molecules, as phenol and cyclohexane. Firstly, the CV was used to determine the possibility of detection. Following these preliminary studies, SWV studies were carried out since that technique is more adequate to promote analytical studies. Results indicates that was possible to characterize molecules artificially introduced to oil phase. Furthermore, it was possible to determine the time of saturation of the printed-screen carbon electrode at the interfacial Oil / water region. It was possible to conclude from this qualitative work that all molecules were successfully detected directly at the crude oil/water interface. On the other hand, future works will be necessary to improve this kind of methodology.
Andrade, Junior Cassio Dias de. "Modelagem eletroquímica e do distúrbio ácido-básico de praticantes dos fundamentos do Parkour." Universidade Tecnológica Federal do Paraná, 2015. http://repositorio.utfpr.edu.br/jspui/handle/1/1890.
Повний текст джерелаThe analysis of the blood metabolites can show the metabolic behavior during physical exercises. This study aimed to analyze the electrochemical and acid base disorders behavior in Parkour athlets, during an exercise routine that used basic movements of this particular sport. Twenty three male athletes (average of 21,4±2,7 years old) with a minimum of two years of experience in Parkour were evaluated. The capillary blood was collected through the fingers in five diferent moments: (1) rest, (2) after warm-up, (3) after exercise, (4) five minutes later and (5) ten minutes later. A course using basic Parkour movements was used as reference. The samples were analyzed by the gasometric equipment GEM Premier 3000. The variables pH, sodium (Na+), potassium (K+), calcium (Ca2+), lactate and bicarbonate (HCO3−) were used. The pH, lactate and HCO3− showed significant variation (p<0,05) in most of the analyzed moments. Ca2+, Na+ and K+ values showed significant difference right after the exercise and a fast recovery after five and ten minutes when compared to the reference values. Results showed a physiological adaptation of electrolytes with a fast recovery back to the reference values. The values of pH, lactate e HCO3− present an anaerobic system usage, as well as a clear metabolic acidosis post exercise. The values obtained in this study are similar to high performance athletes values, mostly in strength and speed modalities. This study contributes to the understanding of the eletrochemical and acid-basic disorders behavior of Parkour athletes, filling a gap in the literature.
Assat, Gaurav. "Anionic redox for high-energy batteries. Fundamental understanding, practical challenges, and future outlook." Electronic Thesis or Diss., Sorbonne université, 2018. http://www.theses.fr/2018SORUS396.
Повний текст джерелаOur increasing dependence on lithium-ion batteries for energy storage applications calls for continual performance improvements of their positive electrodes, which have so far relied solely on cationic redox of transition-metal ions for driving the electrochemical reactions. Great hope has recently been placed on the emergence of anionic redox – a transformational approach for designing Li-rich positive electrodes as it leads to a near-doubling of capacity – hence generating worldwide research interest. However, questions have been raised on the fundamental origins of anionic redox and whether its full potential can be realised in applications. This is exactly what this thesis aims to answer by using the knowledge from the fields of solid-state chemistry, electrochemistry, X-ray spectroscopy, and thermochemistry. We first provide a comprehensive historical account, a theoretical framework, some materials’ design rules, and a survey of characterization techniques specific to anionic redox. Then, through comprehensive experimental studies that were performed in parallel on one ‘model’ (4d metal based) and one ‘practical’ (3d metal based) material, we highlight how the fundamental interplay between cationic and anionic redox processes governs the application-wise important properties of these promising battery materials (i.e. voltage hysteresis, rate performance, voltage decay, and heat generation,). Finally, using these results, we outline possible approaches for improving such materials and for designing novel ones. We also summarize their chances for market implementation in face of the competing nickel-based layered cathodes that are prevalent today
Marape, Gertrude. "Fundamental electrochemical behaviour of pentlandite." Diss., 2010. http://hdl.handle.net/2263/27992.
Повний текст джерелаDissertation (MEng)--University of Pretoria, 2010.
Materials Science and Metallurgical Engineering
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