Log in

Relevant bibliographies by topics / Electrochemistry Experiments / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Electrochemistry Experiments.

Dissertations / Theses on the topic 'Electrochemistry Experiments'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Electrochemistry Experiments.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Eggen, Per-Odd. "Current chemistry : Experiments and Practice in Electrochemistry Education." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for kjemi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-11165.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Molina, Cathy. "Incorporating Electrochemistry and X-ray Diffraction Experiments Into an Undergraduate Instrumental Analysis Course." Thesis, University of North Texas, 2012. https://digital.library.unt.edu/ark:/67531/metadc115123/.

Full text

Abstract:

Experiments were designed for an undergraduate instrumental analysis laboratory course, two in X-ray diffraction and two in electrochemistry. Those techniques were chosen due their underrepresentation in the Journal of Chemical Education. Paint samples (experiment 1) and pennies (experiment 2) were characterized using x-ray diffraction to teach students how to identify different metals and compounds in a sample. in the third experiment, copper from a penny was used to perform stripping analyses at different deposition times. As the deposition time increases, the current of the stripping peak a

APA, Harvard, Vancouver, ISO, and other styles

3

Basilio, Cesar Indiongco. "Thermodynamics and electrochemistry of the chalcocite-potassium ethyl xanthate system." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/90909.

Full text

Abstract:

Comprehensive thermodynamic calculations have been carried out on the chalcocite-KEX-water system based on complete mass balance equations which include both soluble and insoluble species. The calculations have yielded i) E<sub>h</sub>-pH stability diagrams for different KEX additions, ii) equilibrium concentrations and amounts of all the dissolved and insoluble species including those of CuX and CuX₂, iii) two- and three-dimensional plots showing the effect of E<sub>h</sub> and pH on the formation of selected species, and iv) minimum xanthate additions required to form CuX and CuX₂. These inf

APA, Harvard, Vancouver, ISO, and other styles

4

Bullock, Elizabeth Raub. "Synthesis and Electrochemical Properties of {[(bpy)₂Ru(dpp)]₂RhCl₂}(PF₆)₅: A Light Absorber - Electron Collector - Light Absorber Triad AND Development and Evaluation of Integrated Molecular Modeling, Synthesis, and Characterization Laboratory Experiments for the Undergraduate Chemistry Curriculum." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/28043.

Full text

Abstract:

The research detailed herein has been conducted in two different areas. The first research goal was to develop and study a supramolecular system coupling two light absorber units to a central metal site capable of collecting two electrons; this has been accomplished. The complex {[(bpy)2Ru(dpp)]2RhCl2}(PF6)5 was synthesized and characterized using electrochemistry and electronic absorption spectroscopy. The electrochemical properties of {[(bpy)2Ru(dpp)]2RhCl₂}(PF6)5 were probed with cyclic voltammetry and bulk electrolysis studies to investigate the behavior of the system upon two-electron re

APA, Harvard, Vancouver, ISO, and other styles

5

Nguyen, H. Viet. "Model-based experimental design in electrochemistry." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/271773.

Full text

Abstract:

The following thesis applies an experimental design framework to investigate properties of electron transfer kinetics and homogeneous catalytic reactions. The approach is model-based and the classical Butler-Volmer description is chosen to describe the fundamental electrochemical reaction at a conductive interface. The methodology focuses on two significant design variables: the applied potential at the electrode and mass transport mode induced by physical arrangement. An important problem in electrochemistry is the recovery of model parameters from output current measurements. In this work, t

APA, Harvard, Vancouver, ISO, and other styles

6

Martin, Diaz Ulises. "STRESS CORROSION CRACKING OF AUSTENITIC STAINLESS STEEL REBAR IN SIMULATED CONCRETE PORE SOLUTION INFLUENCED BY STRAIN-INDUCED MARTENSITIC TRANSFORMATION." University of Akron / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1626520184452948.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

von, Deak Dieter G. "Heteroatom-containing Carbon Nanostructures as Oxygen Reduction Electrocatalysts for PEM and Direct Methanol Fuel Cells." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1313085489.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Dhanda, Abhishek. "Experimental analysis, modeling, and optimal control of PEM fuel cell electrochemistry /." May be available electronically:, 2008. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

De, la Rica Quesada Roberto. "New concepts for electrical detection of biomolecules." Doctoral thesis, Universitat Autònoma de Barcelona, 2007. http://hdl.handle.net/10803/3584.

Full text

Abstract:

Aquest treball discuteix difrerents aspects relacionats amb el disseny de sensors i sistemes de biodetecció. Descriu la fabricació i caracterització de transductors electrics particulars, així com el desenvolupament de nous sistemes de transduccio i el descobriment de noves methodologies per la fabricacio de nanomatrius de proteines.<br/>En primer lloc, es presenta un nou tipus de transductor impedimetric (I). Es va escollir un disseny basat en dos electrodes interdigitats per dos motius principals. Primer, aquesta geometria permet monitoritzar tant la resistència como la constant dieléctrica

APA, Harvard, Vancouver, ISO, and other styles

10

Casado, Montenegro Francisco Javier. "Superficies conmutables basadas en monocapas autoensambladas de moléculas electroactivas." Doctoral thesis, Universitat Autònoma de Barcelona, 2015. http://hdl.handle.net/10803/299796.

Full text

Abstract:

El trabajo realizado en esta Tesis se ha centrado en la preparación de monocapas auto-ensambladas (SAMs) basadas en moléculas electroactivas para la preparación de interruptores moleculares. A lo largo de este trabajo se han estudiado los siguientes sistemas: tetratiafulvalenos (TTFs), antraquinonas (AQs), ferroceno (Fc) y un metalofullereno endoédrico (EMF). El estado redox de las moléculas ancladas a la superficie cambia cuando se aplica un determinado potencial al sustrato modificado, consiguiendo así variar las propiedades magnéticas, ópticas y/o químicas de la superficie. Estas propiedade

APA, Harvard, Vancouver, ISO, and other styles

11

Zhu, Huanfeng. "Experimental and Theoretical Aspects of Electrode Electrolyte Interfaces." Cleveland, Ohio : Case Western Reserve University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1259680393.

Full text

Abstract:

Thesis(Ph.D.)--Case Western Reserve University, 2010<br>Title from PDF (viewed on 2009-12-30) Department of Chemistry Includes abstract Includes bibliographical references and appendices Available online via the OhioLINK ETD Center

APA, Harvard, Vancouver, ISO, and other styles

12

Soler, Salas Sergio. "Reacciones de arilación promovidas electroquímicamente." Doctoral thesis, Universitat Autònoma de Barcelona, 2017. http://hdl.handle.net/10803/461158.

Full text

Abstract:

La reducción catódica de 4-fluorobenzonitrilo, 4-yodobenzonitrilo, 4-cianofenil triflato, 4--yodonitrobenceno, 3--yodonitrobenceno, 2--yodonitrobenceno y yodobenceno en DMF/Benceno (20/80)+0.6 M Bu4NBF4, durante una electrolisis en discontinuo y en un solo paso a temperatura ambiente, da lugar al producto de acoplamiento cruzado correspondiente: 4-fenilbenzonitrilo, 4--fenilnitrobenceno, 3--fenilnitrobenceno, 2--fenilnitrobenceno y bifenilo con rendimientos de bajos a moderados. El mecanismo propuesto, investigado por voltametría cíclica, y análogamente a lo descrito en ausencia de benceno, im

APA, Harvard, Vancouver, ISO, and other styles

13

Pacios, Pujadó Mercè. "Carbon nanotubes as platforms for biosensors with electrochemical and electronic transduction." Doctoral thesis, Universitat Autònoma de Barcelona, 2011. http://hdl.handle.net/10803/84001.

Full text

Abstract:

La convergència de la nanotecnologia i la biotecnologia porta al desenvolupament de nous coneixements científics i tècnics que permeten millorar el benestar humà. Dins d'aquest nou camp de la nanobiotecnologia, el camp dels (bio)sensors és el més desenvolupat i el que té el major potencial per a aplicacions a curt termini. En aquest context, els (bio)sensors basats en principis electroquímics destaquen pels seus avantatges com la simplicitat, robustesa, baix cost, capacitat de miniaturització i d’integració de dispositius. Aquests sensors són cada vegada més atractius ja que permeten un

APA, Harvard, Vancouver, ISO, and other styles

14

Rivas, Torcates Lourdes. "Electrochemical and optical nanoparticlebased biosensors for point-of-care applications." Doctoral thesis, Universitat Autònoma de Barcelona, 2015. http://hdl.handle.net/10803/285610.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Haghdoost, Atieh. "Theoretical and Experimental Investigations on Microelectrodeposition Process." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/51799.

Full text

Abstract:

Electrodeposition is one of the main techniques for fabricating conductive parts with one or two dimensions in the micron size range. This technique is utilized to coat surfaces with protective films of several micrometers thickness or fabricate 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 of these practices are hard to implement for the reactio

APA, Harvard, Vancouver, ISO, and other styles

16

Yin, Yijing. "An Experimental Study on PEO Polymer Electrolyte Based All-Solid-State Supercapacitor." Scholarly Repository, 2010. http://scholarlyrepository.miami.edu/oa_dissertations/440.

Full text

Abstract:

Supercapacitors are one of the most important electrochemical energy storage and conversion devices, however low ionic conductivity of solid state polymer electrolytes and the poor accessibility of the ions to the active sites in the porous electrode will cause low performance for all-solid-state supercapacitors and will limit their application. The objective of the dissertation is to improve the performance of all-solid-state supercapactor by improving electrolyte conductivity and solving accessibility problem of the ions to the active sites. The low ionic conductivity (10-8 S/cm) of poly(eth

APA, Harvard, Vancouver, ISO, and other styles

17

Tye, Jesse Wayne. "Explorations of iron-iron hydrogenase active site models by experiment and theory." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1014.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Wiezell, Katarina. "Modelling and Experimental Investigation of the Dynamics in Polymer Electrolyte Fuel Cells." Licentiate thesis, KTH, Chemical Engineering and Technology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10087.

Full text

Abstract:

<p>In polymer electrolyte fuel cells (PEFC) chemical energy, in for example hydrogen, is converted by an electrochemical process into electrical energy. The PEFC has a working temperature generally below 100 °C. Under these conditions water management and transport of oxygen to the cathode are the parameters limiting the performance of the PEFC.</p><p>The purpose of this thesis was to better understand the complex processes in different parts of the PEFC. The rate-limiting processes in the cathode were studied using pure oxygen while varying oxygen pressure and humidity. Mass-transport limitat

APA, Harvard, Vancouver, ISO, and other styles

19

Alfonso, Pardo Wilmer. "Development of electrochemical platforms for DNA sensing." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/397662.

Full text

Abstract:

The present doctoral thesis is framed in the research and development (R & D) project between a private biotechnology company of molecular diagnostics Genomica SAU, the Institute for Bioengineering of Catalonia (IBEC), the University of Barcelona, and the Microfluidics ChipShop Company. The main objective of the project is making, implementation and marketing of a diagnostic device for early detection of DNA sequences involved with cancer. The multi device, or lab-on-chip (LOC), consists of a central automation unit (CAU), a system in miniature of DNA amplification or chain reaction polymerase

APA, Harvard, Vancouver, ISO, and other styles

20

Suárez, Guevara Jullieth Gabriela. "Materiales híbridos basados en nanocarbones y polioxometalatos para aplicación como electrodos en supercondensadores con mecanismo dual de almacenamiento de energía." Doctoral thesis, Universitat Autònoma de Barcelona, 2014. http://hdl.handle.net/10803/285650.

Full text

Abstract:

Baterías y supercondensadores son dos tipos de dispositivos de almacenamiento de energía con mecanismos y prestaciones complementarios. Las baterías, con mecanismos de reacciones redox faradaicas presentan alta densidad de energía y baja densidad de potencia mientras que el mecanismo electrostático de los supercondensadores (doble capa eléctrica) les confiere una alta densidad de potencia con densidad de energía limitada. El diseño de materiales y electrodos híbridos que combinen ambos mecanismos es una vía para la mejora simultánea de energía y potencia en un mismo dispositivo. En este

APA, Harvard, Vancouver, ISO, and other styles

21

Batista, Bruno Carreira. "Efeito do envenenamento superficial na dinâmica de osciladores eletroquímicos: experimentos, modelagem e simulações." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/75/75134/tde-30072013-093434/.

Full text

Abstract:

Comportamento oscilatório manifesta-se em diversas escalas da experiência humana estando presente desde sistemas vivos, como no caso dos ritmos biológicos, até estruturas artificiais como a evolução de preços na bolsa de valores. Em eletroquímica e, em particular, na área de eletrocatálise, oscilações de potencial do eletrodo ou corrente que flui através deste são facilmente observáveis, requerendo apenas condições simples de controle experimental como a aplicação de uma corrente constante ou a utilização de uma resistência externa. Diversos trabalhos na literatura exploram as especificidades

APA, Harvard, Vancouver, ISO, and other styles

22

Montón, i. Domingo Helena. "Development of quantum dot-based tools for in vitro and biosensing applications." Doctoral thesis, Universitat Autònoma de Barcelona, 2015. http://hdl.handle.net/10803/319702.

Full text

Abstract:

Aquesta tesi descriu l’ús de quantum dots (QDs) en el desenvolupament de noves eines per aplicacions biològiques. S’han utilitzat QDs comercials d’estructura core/shell de CdSe/ZnS amb propietats òptiques i electroquímiques úniques gràcies a les quals s’han desenvolupat diversos sensors òptics i electroquímics per detectar proteïnes, cèl·lules i ADN. Primerament es va descriure un protocol utilitzant QDs en immunocitoquímiques per visualitzar proteïnes intracel·lulars com la β-tubulina (proteïna de microtúbuls), la GM130 (proteïna de l’aparell de Golgi o la EEA1 (proteïna d’endosomes). L’ús

APA, Harvard, Vancouver, ISO, and other styles

23

Bruguera, Casamada Carmina. "Desinfecció electroquímica d'aigües residuals per processos d'oxidació avançada." Doctoral thesis, Universitat de Barcelona, 2018. http://hdl.handle.net/10803/665200.

Full text

Abstract:

Els mètodes electroquímics s’estan estudiant com a mètodes alternatius pel tractament de l’aigua amb la finalitat d’eliminar-ne els contaminants, tant els microbiològics com els químics, en qualsevol punt del cicle de l’aigua. L’oxidació electroquímica, l’electro-Fenton (EF) i el fotoelectro-Fenton (FEF) són processos electroquímic d’oxidació avançada (PEOA) on per reaccions d’oxidació i reducció es produeixen espècies oxigenades reactives (ROS), “in situ”, que són forts oxidants. L’espècie més significativa que es forma és el radical hidroxil (•OH), una espècie molt reactiva que reacciona d

APA, Harvard, Vancouver, ISO, and other styles

24

Sebastián, Ávila José Luis. "Desarrollo de aptasensores para la detección de bacterias enteropatógenas." Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/460682.

Full text

Abstract:

El objetivo general de esta tesis doctoral fue el desarrollo de biosensores basados en aptámeros para la detección de bacterias enteropatógenas. Para ello se estudiaron diferentes estrategias de detección gracias a las propiedades únicas de los aptámeros, tales como su capacidad de adoptar diferentes estructuras conformacionales tras el enlace con la molécula diana, su estabilidad y la facilidad con que se pueden modificar químicamente, introduciendo marcajes o ciertos grupos funcionales. Las bacterias utilizadas en todas las estrategias de detección fueron: Salmonella typhimurium (diana del a

APA, Harvard, Vancouver, ISO, and other styles

25

Ros, Figueras Carles. "Stable and efficient photoelectrodes for solar fuels production." Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/668193.

Full text

Abstract:

The excessive consumption of non-renewable energy sources such as fossil fuels has lead the world to a global climate change, urging for new energy consumption habits together with developing cost- effective alternative renewable technologies. Photoelectrochemical (PEC) water splitting allows for direct conversion of solar light and water into hydrogen and oxygen, storing energy into chemical bonds, solving the storage problem of photovoltaic technology. It has demonstrated to produce pure hydrogen and oxygen in significant efficiencies, although this technology is not ready for market impleme

APA, Harvard, Vancouver, ISO, and other styles

26

Mena, Fernández Silvia. "Detection, activation capture and valorization of CO2 in green solvents through processes electrochemically triggered." Doctoral thesis, Universitat Autònoma de Barcelona, 2021. http://hdl.handle.net/10803/671986.

Full text

Abstract:

Aquesta tesi presenta enfocaments eficients per produir compostos d’alt valor utilitzant i valoritzant el CO2. La metodologia emprada es basa en tècniques electroquímiques, que permeten utilitzar solucions químiques ecològiques, a més de mantenir l’objectiu d’oferir una potencial estratègia a llarg termini per reduir les emissions de CO2 a l’atmosfera, al temps que s’obtenen compostos útils. A més, els líquids iònics s’introdueixen com una alternativa més ecològica als tradicionals dissolvents orgànics apròtics emprats en els experiments electroquímics. Així mateix, es presenta una síntesi sos

APA, Harvard, Vancouver, ISO, and other styles

27

Barreiros, dos Santos Marília. "Development of a multi-electrode impedimetric biosensor: detection of pathogenic bacteria and mycotoxins." Doctoral thesis, Universitat de Barcelona, 2014. http://hdl.handle.net/10803/284584.

Full text

Abstract:

This thesis aims the development of a multi-electrode platform with applications on different biosensing fields: (i) detection of pathogenic bacteria E.coli O157:H7 and (ii) detection of the mycotoxin Ochratoxin A. For most label-free biosensors, including impedimetric biosensors, the principal limitation on multiplexing arises from the affinity step. Therefore, a great part of the research work described here deals with the characterization, optimization and evaluation of different functionalization strategies for biosensing. These surface functionalization strategies developed here are appli

APA, Harvard, Vancouver, ISO, and other styles

28

Silva, Rodrigo César Costa. "Tribocorrosão do aço UNS S32750 em meio cloretado: instrumentação e resultados experimentais." Universidade do Estado do Rio de Janeiro, 2010. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=1602.

Full text

Abstract:

Duas das principais formas de degradação de materiais metálicos estão relacionadas a danos mecânicos e eletroquímicos, devidos ao atrito, e à corrosão, respectivamente. Especialmente em materiais passivos, como os aços inoxidáveis, observa-se uma sinergia entre esses mecanismos de dano. Nesta dissertação foram realizados ensaios de tribocorrosão do aço superduplex UNS S32750 em solução aquosa de 3,5% em massa de NaCl. Para realizar estes ensaios foi necessário, inicialmente, instrumentar e adaptar um tribômetro do tipo pino-no-disco construído no Instituto Politécnico da UERJ. Para identificar

APA, Harvard, Vancouver, ISO, and other styles

29

Parra, Puerto Andrés. "Towards Artificial Photosynthesis: Photoelectrochemical CO2 Reduction to Solar Fuels." Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/347965.

Full text

Abstract:

This thesis is devoted to prove the concept of the CO(2) reduction to CH(4) with a decreasing in the voltage requirements using a photocatalytic mechanism. Subsequently, part of the solar energy is transferred to the reaction, obtaining an improvement in the total energy balance. The work developed intends first, to take advantage of the know features of the photoactive nanostructured materials obtained by anodization and hydrothermal synthesis (allowing to obtain better surface areas and improving the photon collection, light photosynthetic reactions). Second investigate the copper and copper

APA, Harvard, Vancouver, ISO, and other styles

30

Insignares, Cristina. "Raman scattering based strategies for assessment of advanced chalcopyrite photovoltaic technologies: Characterisation of electrodeposited Cu(In,Ga)(S,Se)2 solar cells." Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/384606.

Full text

Abstract:

The main objective of this thesis is the development of Raman scattering based methodologies for the analysis of advanced electrodeposition-based CIGS technologies, with the identification and characterization of parameters relevant for the efficiency of the solar cells and modules that can be used for quality control and process monitoring applications. The work aims to propose methodologies and tools that can be implemented for the monitoring of the processes at on-line level, contributing to increase the yield and reliability of the processes involved in the fabrication of these devices. Th

APA, Harvard, Vancouver, ISO, and other styles

31

González, Calabuig Andreu. "Electronic Tongues for food and security applications." Doctoral thesis, Universitat Autònoma de Barcelona, 2018. http://hdl.handle.net/10803/643301.

Full text

Abstract:

En la present tesi doctoral s’aprofundeix en l’estudi de les llengües electròniques i el seu desenvolupament com a línia d’investigació del grup de Sensors i Biosensors de la Universitat Autònoma de Barcelona. Aquesta línea d’investigació posa el focus en l’aplicació dels coneixements del grup d’investigació en desenvolupament de sensors electroquímics per a desenvolupar matrius de sensors per al seu ús en aplicacions del tipus Llengua Electrònica en diferents camps. La llengua electrònica es considera un nou paradigma en el món dels sensors ja que millora el resultats analítics mitjanç

APA, Harvard, Vancouver, ISO, and other styles

32

Eskandari, Azin. "A preliminary theoretical and experimental study of a photo-electrochemical cell for solar hydrogen production." Thesis, Université Clermont Auvergne‎ (2017-2020), 2019. http://www.theses.fr/2019CLFAC104.

Full text

Abstract:

Afin de relever le défi énergétique et climatique du 21ième siècle qui s’annonce, une solution consiste, pour valoriser la ressource solaire, à mettre au point des procédés de production de vecteurs énergétiques stockables par photosynthèse artificielle permettant la synthèse de carburants solaires, en particulier l’hydrogène. La compréhension de ses procédés et l’obtention de performances cinétiques et énergétiques élevées nécessitent le développement de modèles de connaissance génériques, robustes et prédictifs considérant le transfert de rayonnement comme processus physique contrôlant le pr

APA, Harvard, Vancouver, ISO, and other styles

33

Caballero, de Sánchez Griselda Maruja. "Síntesis y caracterización de electrocatalizadores polimetálicos basados en Pt con estructura núcleo-corteza para pilas de combustible de electrolito polimérico." Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/346052.

Full text

Abstract:

Las pilas de combustible están ya entrando en el mercado de consumo como fuentes de energía de dispositivos móviles y estacionarios. Son de especial interés las pilas de combustible de membrana de intercambio protónico (PEMFC) y de metanol directo (DMFC), aplicables a vehículos de transporte y a pequeña instrumentación, en las que el combustible preferido es el hidrógeno y el metanol, respectivamente. El hidrógeno se produce de forma económica mediante reformado, con lo que dicho combustible resulta acompañado de CO residual capaz de envenenar el platino que típicamente se usa como electrodo e

APA, Harvard, Vancouver, ISO, and other styles

34

Pruna, Morales Raquel. "Transparent nanostructured metal oxides for chemical biosensors: towards point-of-care environments." Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/667646.

Full text

Abstract:

There is an increasing need for developing innovative, versatile and low-cost point-of-care (POC) systems capable of screening for at early stages of development. POC systems usually consist of a biosensor part integrated in an electronic circuit and eventually a microfluidic system to manage the body fluid samples. The aim of this doctoral thesis is to investigate several ways of improving POC technology. On the one hand, biosensors currently integrated into POC systems have limitations. A wide variety of important analytes cannot be properly detected and quantified, and methods supported

APA, Harvard, Vancouver, ISO, and other styles

35

Nyman, Andreas. "An Experimental and Theoretical Study of the Mass Transport in Lithium-Ion Battery Electrolytes." Doctoral thesis, KTH, Tillämpad elektrokemi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-29121.

Full text

Abstract:

Lithium‐ion batteries are particularly suitable as energy storage solutions in high power applications, such as hybrid electric vehicles. It is generally considered that one of the processes that limit the power density for lithium‐ion batteries is the mass transport in the electrolyte. Yet, it is still difficult to find a set of properties that fully describe the mass transport for the most common electrolytes. In this work, characterization studies of the mass transport were undertaken for two technically important lithium‐ion battery electrolytes: (1) a liquid electrolyte which consist of L

APA, Harvard, Vancouver, ISO, and other styles

36

Cortés, Francisco Meritxell. "Electrodeposició de capes metàl·liques per a la seva incorporació en sensors i actuadors / Metallic films deposition for their incorporation in sensors and actuators." Doctoral thesis, Universitat de Barcelona, 2012. http://hdl.handle.net/10803/96476.

Full text

Abstract:

Electrodeposition involves chemical phenomena associated with charge separation and transfer that can occur homogeneously in solution, or heterogeneously over electrode surfaces. In order to assure electroneutrality at least two charge transfer half-reactions should take place. In the case of heterogeneous redox reactions, these half-reactions occur over two different electrodes immersed in a solution. It presents several advantatges over other methods commonly used to prepare films and structures which require vacuum conditions, physical or chemical vapor deposition (PVD or CVD), plasma e

APA, Harvard, Vancouver, ISO, and other styles

37

Chiabrera, Francesco Maria. "Interface Engineering in Mixed Ionic Electronic Conductor Thin Films for Solid State Devices." Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/667601.

Full text

Abstract:

Interface-dominated materials such as nanocrystalline thin films have emerged as an enthralling class of materials able to engineer functional properties of transition metal oxides widely used in energy and information technologies. In this direction, it has been recently proved that grain boundaries (GBs) in the perovskite La1-xSrxMnO3±δ (manganite) deeply impact its functional properties, boosting the oxygen mass transport while abating the electronic and magnetic order. The impact of grain boundary in nanocrystalline thin films is so relevant to radically change the behaviour of the materia

APA, Harvard, Vancouver, ISO, and other styles

38

Irtem, Ibrahim Erdem. "Production of Solar Fuels by Photoelectrochemical Conversion of Carbon Dioxide." Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/404018.

Full text

Abstract:

Growing global emission of carbon dioxide gas (CO2) reflects the world’s energy dependence on fossil fuels. The conversion of CO2 emission into value-added products, like fuels completes a circular CO2 economy which requires a renewable energy conversion and storage system. Amongst a few, photo/electrochemistry has been particularly appealing thanks to its energy efficiency and enormous potential for industrial applications. Formic acid (HCOOH) production from CO2 reduction appears as an alternative energy storage option based on the commercialization of this process. Herein, stable and sele

APA, Harvard, Vancouver, ISO, and other styles

39

Yu, Xiaoting. "Transformation of Nanocrystals in Electrochemical Energy Technologies." Doctoral thesis, Universitat de Barcelona, 2020. http://hdl.handle.net/10803/670922.

Full text

Abstract:

This thesis focuses on the synthesis of different types of NCs, their application to energy conversion and storage technologies, particularly LIBs, KIBs and DEFCs, and their structural transformation during electrochemical processes within these energy storage and conversion applications. The morphology and composition of target transition metal oxides, bimetallic NCs and phosphorous incorporated intermetallic NRs are characterized in detail to follow the alterations during application. An understanding of the correlation between structural, chemical and electrochemical properties will allow a

APA, Harvard, Vancouver, ISO, and other styles

40

Serrà, i. Ramos Albert. "New electrochemical strategies for synthesising micro- and nano- structures." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/399918.

Full text

Abstract:

Nowadays, researchers have spent considerable effort on the development of new materials, with new properties and characteristics, and new methods of synthesis, in order to meet the demands of a market that is constantly evolving. In this sense, “New electrochemical strategies for synthesising micro- and nano-structures” proposes, generalizes and discusses the development of novel electrochemical methods, strategies or media to prepare different kinds of micro- and nanostructured materials. The leitmotiv could be focused on the possibility of preparing micro-patterned (Cu), nanoparticulated (C

APA, Harvard, Vancouver, ISO, and other styles

41

Zuo, Yong. "Nanostructured Metal Sulfides for Electrochemical Energy Conversion." Doctoral thesis, Universitat de Barcelona, 2020. http://hdl.handle.net/10803/670925.

Full text

Abstract:

Storing the fluctuating renewable energy into synthetic fuels or in batteries is meaningful due to the emerging energy crisis. In this thesis, four nanostructured catalysts based on two kinds of metal sulfides, namely Cu2S and SnS2, were produced and optimized to improve their performance towards three key electrochemical energy conversion processes, namely electrochemical oxygen evolution, photoelectrochemical water splitting and lithium-ion batteries. Chapter 1 presented a general introduction to explain the motivation of the thesis topic. In chapter 2, a metallic copper substrate was used a

APA, Harvard, Vancouver, ISO, and other styles

42

Li, Junshan. "Ni- and Sn-based Colloidal Nanoparticles for Electrochemical Energy Technologies." Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/667475.

Full text

Abstract:

In this project, nanoparticles were produced by solution-based one-pot synthesis, particularly colloidal methods. A series of powerful tools were used to characterize the structure and surface compositions before they were tested as anode materials in the field of energy conversion and storage. Firstly, we produced colloidal Ni polyhedral (16 ± 2 nm) and spherical (13 nm) NCs. The electrocatalytic properties of electrodes based on these NCs were first investigated in variable concentrations of KOH. Electrodes based on Ni polyhedral NCs displayed impressive current densities (59.4 mA cm 2) an

APA, Harvard, Vancouver, ISO, and other styles

43

Piñera, Bartolome Joanne. "Preparation, characterization and electroanalytical applications of carbon nano-onion modified surfaces." Doctoral thesis, Universitat Rovira i Virgili, 2015. http://hdl.handle.net/10803/313993.

Full text

Abstract:

La present tesi es va centrar en explorar noves estratègies de preparació i modificació de nanoarquitecturas basades en nanocebollas de carboni amb l'objectiu d'expandir les seves aplicacions mitjançant la construcció de nous sistemes de detecció amb propietats millorades. Aquests nanomaterials van ser preparats de manera controlada per escalfament de nanodiamant i van ser dipositats en superfícies d'elèctrodes. Es van obtenir dispersions en solució aquosa emprant interaccions supramoleculars i es van implementar en sensors per molècules petites, proteïnes i ADN amb alta sensibilitat. Encara q

APA, Harvard, Vancouver, ISO, and other styles

44

Boissonneau, Patrick. "Propulsion MHD en eau de mer : étude des couplages hydrodynamique-électrochimie-électromagnétisme." Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10079.

Full text

Abstract:

La magnetohydrodynamique (mhd) permet de realiser des propulseurs a reaction fournissant des flux d'eau de mer a grande vitesse sans helice ni piece mecanique en mouvement. En appliquant a un ecoulement d'eau de mer des champs magnetique et electrique, on produit directement au sein de l'ecoulement des forces electromagnetiques (laplace) qui propulsent le navire. Malheureusement l'eau de mer est un electrolyte : le passage des courants amenes par des electrodes entraine une electrolyse non desiree. Le travail presente se consacre a l'etude des couplages suivants : - influence de l'hydrodynamiq

APA, Harvard, Vancouver, ISO, and other styles

45

Abdi, Djamila. "Application de l'electrode a disque tournant a l'etude du comportement electrochimique du cuivre en milieu neutre et en milieu acide en absence et en presence d'especes sulfurees." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13176.

Full text

Abstract:

Etude de la corrosion du cuivre en milieu acide (perchlorique acide) et saline (borate de sodium) par des techniques electrochimiques. Influence des especes sulfures sur la cinetique de corrosion des electrodes tournantes en cuivre

APA, Harvard, Vancouver, ISO, and other styles

46

Abou, Hamad Ibrahim Rikvold Per Arne. "Statics and dynamics of halide sub-monolayer electrosorption on silver computer simulations with comparison to experiments /." Diss., 2006. http://etd.lib.fsu.edu/theses/available/etd-04102006-161631.

Full text

Abstract:

Thesis (Ph. D.)--Florida State University, 2006.<br>Advisor: Per Arne Rikvold, Florida State University, College of Arts and Sciences, Dept. of Physics. Title and description from dissertation home page (viewed June 12, 2006). Document formatted into pages; contains xi, 90 pages. Includes bibliographical references.

APA, Harvard, Vancouver, ISO, and other styles

47

chen, chi-li chang, and 張簡琦麗. "A Study on the Design of Microscale Electrochemistry Experiments for Senior High School ─ “Microscale Electrolysis Apparatus” and “Microscale Fuel Cells”." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/96792291299568698129.

Full text

Abstract:

碩士<br>國立高雄師範大學<br>化學系<br>90<br>The purposes of this study are to design two sets of microscale electrochemistry experiments apparatus. These two apparatus may be supplied for chemistry course in senior high school and estimated that the efficacy during experiment are carried out. And therefore, they have been evaluated that if these apparatus can promote student’s interest in chemistry. The apparatus in this study are “microscale hydrogen and oxygen mixed exploding apparatus” and “microscale hydrogen/oxygen fuel cells”. The subjects of this study are sampling from senior high scho

APA, Harvard, Vancouver, ISO, and other styles

48

(5930426), Rong Xu. "Theories and Experiments on the Electro-Chemo-Mechanics of Battery Materials." Thesis, 2019.

Find full text

Abstract:

<p>Li-ion batteries is a system that dynamically couples electrochemistry and mechanics. The electrochemical processes occurring during battery operation induces a wealth of elemental mechanics such as deformation, plasticity, and fracture. Likewise, mechanics influences the electrochemical processes via modulating the thermodynamics of Li reactions and kinetics of ionic transport. These complex interrelated phenomena are far from being well understood and need to be further explored. This thesis studies the couplings between the mechanical phenomena and electrochemical processes in Li-ion bat

APA, Harvard, Vancouver, ISO, and other styles

49

Chen, Meng-Jun, and 陳孟君. "The impact of online collaborative problem solving with 3D simulated experiment on 8th graders’ electrochemistry learning." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/87d453.

Full text

Abstract:

碩士<br>國立交通大學<br>教育研究所<br>107<br>This study developed electrochemistry online collaborative problem which specifically focus on providing students with opportunity to experience the collaborative problem solving experience with their peers and also actually doing experiment with 3D animation experiments. The main purpose of this study was to examine the effectiveness of online collaborative problem solving integrate with/without scaffolding on 8th graders’ problem solving performance. A total of 105 eight grade students were randomly assigned into two different groups which one of the group rec

APA, Harvard, Vancouver, ISO, and other styles

50

"Experimental Measurements of the Power Output of a Cu/Cu2+ Thermogalvanic Brick." Master's thesis, 2018. http://hdl.handle.net/2286/R.I.51614.

Full text

Abstract:

abstract: Buildings continue to take up a significant portion of the global energy consumption, meaning there are significant research opportunities in reducing the energy consumption of the building sector. One widely studied area is waste heat recovery. The purpose of this research is to test a prototype thermogalvanic cell in the form factor of a UK metric brick sized at 215 mm × 102.5 mm × 65 mm for the experimental power output using a copper/copper(II) (Cu/Cu2+) based aqueous electrode. In this study the thermogalvanic brick uses a 0.7 M CuSO4 + 0.1 M H2SO4 aqueous electrolyte with coppe

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!