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Dissertations / Theses on the topic 'Palladium Nanopartikel'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Meusel, Ingo. "Aufbau einer Molekularstrahlapparatur für oberflächenkinetische Untersuchungen." [S.l.] : [s.n.], 2002. http://edocs.tu-berlin.de/diss/2002/meusel_ingo.pdf.

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2

Heel, Andre. "Integriertes Verfahren zur Funktionalisierung der Oberfläche von gasgetragenen Partikeln durch MOCVS, MOCVD und dessen Anwendung auf die Herstellung von Pd-SiO2-Katalysatoren." Karlsruhe : Univ.-Verl. Karlsruhe, 2006. http://www.uvka.de/univerlag/volltexte/2007/183/.

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3

Heel, Andre. "Integriertes Verfahren zur Funktionalisierung der Oberfläche von gasgetragenen Partikeln durch MOCVS, MOCVD und dessen Anwendung auf die Herstellung von Pd-SiO2-Katalysatoren." Karlsruhe Univ.-Verl. Karlsruhe, 2007. http://nbn-resolving.de/urn:nbn:de:0072-55238.

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4

Ulbrich, Till. "Co, Pd- und Co, Pt-Schichtsysteme auf Partikelmonolagen." Berlin dissertation.de, 2008. http://d-nb.info/989281876/04.

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5

Dietrich, Sascha. "(Metallo-)Dendrimers in Catalysis, Nanoparticle Stabilization and Biological Application." Doctoral thesis, Universitätsbibliothek Chemnitz, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-82016.

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(Metallo-)Dendrimers in Catalysis, Nanoparticle Stabilization and Biological Application Technische Universität Chemnitz, Fakultät für Naturwissenschaften Dissertation 2011, 165 Seiten Die vorliegende Dissertationsschrift befasst sich mit der Darstellung, Charakterisierung und Anwendung neuartiger (Metallo-)Dendrimere. Den Schwerpunkt der Arbeit bildet dabei die terminale Funktionalisierung (Poly)amidoamin-basierender Dendrimere kleiner Generationen. Durch Standardpeptid-Knüpfungsreaktionen von 1,1´-(Diphenylphosphino)ferrocen-carbonsäure an dendritische (Poly)amidoamine ist eine Serie ent

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6

Assim, Khaybar. "Synthese und Charakterisierung von Übergangsmetallkomplexen zur Herstellung von nanostrukturierten Materialien." Doctoral thesis, Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-224679.

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Die vorliegende Dissertation beschäftigt sich mit der Synthese und Charakterisierung von Übergangsmetallkomplexen und deren Anwendungen in der MOCVD (= metal-organic chemical vapor deposition), sowie als Precursoren zur Darstellung von Nanopartikeln und Nanokompositen. Ein Schwerpunkt dieser wissenschaftlichen Arbeit liegt dabei in der Entwicklung von Me-, tBu- und SiMe3-substituierten Manganhalbsandwichkomplexen für die Generierung dünner Mangan-basierter Schichten mittels MOCVD-Technik. Die gezielte strukturelle Veränderung des Cyclopentadienyl-Liganden beeinflusst die physikalischen und ch

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7

Ziegler, Christoph. "Syntheses and Assemblies of Noble Metal Nanostructures." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-101781.

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Shape and size control as well as the control of the assembly of nanostructures are current challenges in nano sciences. Focussing on metal nanostructures all of these aspects have been addressed in the frame of the present work. It was possible to develop a new aqueous seeded growth method that produces gold nanoparticles with adjustable diameters over a large range of sizes. The spherical particles obtained show very low polydispersities and a good long term stability. Furthermore it was possible to reveal the growth mechanism of these particles utilizing electron microscopy and optical inve

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8

Patil, Pratap Tukaram. "Nanoscopic metal fluoride based novel solid catalysts." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2009. http://dx.doi.org/10.18452/16021.

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Metallfluoride sind dank ihrer hohen chemischen und thermischen Stabilität, insbesondere bei Reaktionen unter Beteiligung von hoch korrosiven Gasen (HF, HCl, Cl2, F2) den entsprechenden Oxiden überlegen. Über den Sol-Gel Prozess synthetisierte Produkte weisen oft spezifische, zum Teil sehr unterschiedliche Eigenschaften im Vergleich zu klassisch hergestellten Verbindungen auf. In dieser Arbeit wurde der Sol-Gel Prozess zur Herstellung von binären Fluoriden (AlF3, MgF2, CaF2, CuF2 und FeF3) genutzt und zum Teil weiter entwickelt sowie das Synthesepotential dieser Methode als Zugang für komplex

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9

Rose, Marcus, Andreas Notzon, Maja Heitbaum, et al. "N-Heterocyclic carbene containing element organic frameworks as heterogeneous organocatalysts." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-138636.

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A bifunctional imidazolium linker was used for the production of highly crosslinked element organic frameworks by Suzuki-coupling with tetrafunctional boronic acids. The resulting porous materials are good heterogeneous organocatalysts in the N-heterocyclic carbene-catalyzed conjugated umpolung of α,β-unsaturated cinnamaldehyde<br>Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich

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10

Rose, Marcus, Andreas Notzon, Maja Heitbaum, et al. "N-Heterocyclic carbene containing element organic frameworks as heterogeneous organocatalysts." Royal Society of Chemistry, 2011. https://tud.qucosa.de/id/qucosa%3A27766.

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A bifunctional imidazolium linker was used for the production of highly crosslinked element organic frameworks by Suzuki-coupling with tetrafunctional boronic acids. The resulting porous materials are good heterogeneous organocatalysts in the N-heterocyclic carbene-catalyzed conjugated umpolung of α,β-unsaturated cinnamaldehyde.<br>Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.

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11

Brazeau, Nicolas. "Palladium-Based Catalysts for Ethanol Electrooxidation in Alkaline Media." Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/32201.

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Direct ethanol fuel cells have been shown to be a good alternative to internal combustion engines in order to reduce the CO2 emissions. In this study, Pd and Pd-based nanocatalysts were deposited on various supports (carbon black, graphene, SnO2, CeO2, TiO2, TiO2 nanotubes and SnO2/TiO2 nanotubes) and their effects on the catalytic properties of the deposited metal for ethanol oxidation in alkaline media are studied. These modifications to the catalytic systems have shown to cause an increase in the reaction rate at the surface of the catalyst and to reduce the overpotential of the ethanol oxi

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12

Broderick, Meghann. "Characterization of Stabilized Palladium Nanocatalysts." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/2201.

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Metal nanoparticles have received much interest for their application in catalysis due to high surface-to-volume ratios resulting in more available active sites. Ideally these catalysts are heterogeneous and allow for facile separation from the catalytic reaction mixture making them ideal for industrial application. Dispersed metal nanoparticles are explored due to their high reactivity in solution and are stabilized by surfactants and polymers. However, it is difficult to determine whether or not a catalyst is truly heterogeneous as a certain degree of leaching from the metal nanoparticle

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13

Dekura, Shun. "Systematic Study on the Pd-H Interaction in the α-Phase PdHx". Kyoto University, 2019. http://hdl.handle.net/2433/236603.

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14

Heinrich, Frank [Verfasser]. "Neuartige Palladium- und Kupfer-Komplexe als molekulare Vorstufen zur Darstellung von Nanopartikeln / Frank Heinrich." München : Verlag Dr. Hut, 2012. http://d-nb.info/1025821297/34.

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15

Luongo, Kevin. "Palladium Doped Nano Porous Silicon to Enhance Hydrogen Sensing." Scholar Commons, 2006. http://scholarcommons.usf.edu/etd/3896.

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A mass manufacturable impedance based, palladium doped porous silicon sensor, was fabricated for hydrogen detection. The sensor was built using electrochemical etching to produce mesoporous silicon. Four nanometers of palladium was defused directly into the porous silicon and another four nanometers of Pd was deposited on the defused surface to enhance sensing. The sensor was tested in a sealed chamber in which the impedance was measured while hydrogen in nitrogen was ranged from 0-2 percent. Unlike conventional hydrogen sensors this sensor responded at room temperature to changes in hydrogen

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16

Ping, Eric Wayne. "Silica supported palladium nanoparticles for the decarboxylation of high-acid feedstocks: design, deactivation and regeneration." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/39537.

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The major goals of this thesis were to (1) design and synthesize a supported catalyst with well-defined monodisperse palladium nanoparticles evenly distributed throughout an inorganic oxide substrate with tunable porosity characteristics, (2) demonstrate the catalytic activity of this material in the decarboxylation of long chain fatty acids and their derivatives to make diesel-length hydrocarbons, (3) elucidate the deactivation mechanism of supported palladium catalysts under decarboxylation conditions via post mortem catalyst characterization and develop a regeneration methodology thereupon,

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17

Miller, Benjamin I. "A study of the attachment of a palladium molecular square to a planar gold surface or nanoparticle." Virtual Press, 2006. http://liblink.bsu.edu/uhtbin/catkey/1356251.

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We plan to study the attachment of a cationic tetranuclear palladium II-based macrocyclic square onto a planar gold surface or a gold nanoparticle. To understand the possible mechanisms of attachment of inorganic molecular square to gold we will see if certain related salts can cause an induced aggregation of nanoparticles.The replacement of the surface-passivated citrate layer on the gold nanoparticles can be characterized by infrared spectroscopy and shifts in the surface plasmon resonance band. Consequently, if it can bond gold nanoparticles via electrostatic interactions, then it may be po

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18

Vijwani, Hema. "HIGHLY ACTIVE POROUS CATALYSTS FABRICATED BY ATTACHMENT OF PALLADIUM NANOPARTICLES ON HIERARCHICAL CARBON STRUCTURES." Wright State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=wright1310438347.

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19

Kirchner, Alexander. "Synthese von Edelmetallclustern auf S-Layern und deren katalytische Eigenschaften." Doctoral thesis, [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=976482282.

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20

Hokenek, Selma. "Structured Materials for Catalytic and Sensing Applications." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4507.

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The optical and chemical properties of the materials used in catalytic and sensing applications directly determine the characteristics of the resultant catalyst or sensor. It is well known that a catalyst needs to have high activity, selectivity, and stability to be viable in an industrial setting. The hydrogenation activity of palladium catalysts is known to be excellent, but the industrial applications are limited by the cost of obtaining catalyst in amounts large enough to make their use economical. As a result, alloying palladium with a cheaper, more widely available metal while maintainin

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21

Shin, Hyeon Ung. "Catalytic property of fiber media supported palladium containing alloy nanoparticles and electrospun ceramic fibers biodurability study." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1458404276.

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22

Clavadetscher, Jessica Veronica. "Transition metal catalysis : a new paradigm in bioorthogonal drug activation." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/29580.

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Powerful tools have emerged in the past few years to allow the sensing, imaging and modulation of biological processes in living systems. Bioorthogonal organometallic reactions are transformations catalysed by transition metals, which are compatible within a biological environment. Palladium-mediated cross-coupling and decaging reactions, for example, have been successfully applied to catalyse non-natural chemical transformations within a biological milieu. Up until now, copper-catalysed cycloaddition reactions have been used extensively for the conjugation, immobilisation, and purification of

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23

Wang, Wenhu. "Hierarchical Hybrid Materials from Flexible Fabric Substrates." Wright State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=wright1590083299625317.

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24

Petrucci, Oscar. "Ferritin-Based Photo-Oxidation of Biomass for Nanoparticle Synthesis, Bioremediation, and Hydrogen Evolution." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/4308.

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The cell is the basic unit of all living organisms. It is an amazing machine capable of self-replicating, growing, and synthesizing and shuttling thousands of compounds. To perform all of these activities the cell needs energy. The original source of energy for all living beings is the Sun. The energy of the sun is collected by the autotrophs (mostly plants) through photosynthesis and stored in the chemical bonds of carbohydrates and lipids through carboxylic acid intermediates; animals use these compounds to obtain the energy for their cells. Most of the energy extracted by the cell comes fro

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25

Narayanan, Radha. "Shape-Dependent Nanocatalysis and the Effect of Catalysis on the Shape and Size of Colloidal Metal Nanoparticles." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6878.

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From catalytic studies in surface science, it has been shown that the catalytic activity is dependent on the type of metal facet used. Nanocrystals of different shapes have different facets. This raises the possibility that the use of metal nanoparticles of different shapes could catalyze different reactions with different efficiencies. The catalytic activity is found to correlate with the fraction of surface atoms located on the corners and edges of the tetrahedral, cubic, and spherical platinum nanoparticles. It is observed that for nanoparticles of comparable size, the tetrahedral nanop

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26

Holade, Yaovi. "Transformation électrocatalytique de sucres couplée à la réduction enzymatique de l'oxygène moléculaire pour la production d'énergie." Thesis, Poitiers, 2015. http://www.theses.fr/2015POIT2262/document.

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Le développement de générateurs d'énergie pour alimenter des micro-appareils électroniques implantés est devenu une option inéluctable. L'objectif général qui a orienté ces recherches était l'élaboration et les études approfondies des propriétés nanomatériaux métalliques utilisables comme électrocatalyseurs afin de convertir l'énergie chimique en énergie électrique. Les nanomatériaux sont obtenus par la méthode de synthèse : Bromide Anion Exchange (BAE) qui a été scrupuleusement revisitée puis optimisée avec un agent réducteur faible (AA) et fort (NaBH4). Cette voie de synthèse a permis d'obte

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27

Wang, Jijin. "Sum frequency generation study of CO adsorbed on palladium single crystal and nanoparticles : adsorption and catalytic oxidation as a function of size." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00933675.

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The CO reaction on metals is of great interest experimentally and theoretically because it serves as a model system to understand molecular chemisorption and catalyzed reactions on metals. This thesis aims at progressing along the general trends of surface science: bridging the pressure and material gaps in the study of catalysts. Sum Frequency Generation (SFG) is at the heart of this work. It involves a nonlinear optical process with an IR pulse induced coherent first-order polarization up-converted by a visible pulse into a second-order polarization at the sum frequency. In this thesis it is

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28

Navlani-García, Miriam. "Preparation of zeolite-based catalysts and zeolite thin films for environmental applications." Doctoral thesis, Universidad de Alicante, 2014. http://hdl.handle.net/10045/46105.

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29

Long, Wei. "Designing immobilized catalysts for chemical transformations: new platforms to tune the accessibility of active sites." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/49017.

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Chemical catalysts are divided into two traditional categories: homogeneous and heterogeneous catalysts. Although homogeneous (molecular) catalysts tend to have high activity and selectivity, their wide application is hampered by the difficulties in catalyst separation. In contrast, the vast majority of industrial scale catalysts are heterogeneous catalysts based on solid materials. Immobilized catalysts, combining the advantages of homogeneous and heterogeneous catalysts, have developed into an important field in catalysis research. This dissertation presents synthesis, characterization and e

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30

Wang, Dong. "Nouveaux catalyseurs recyclables pour les réactions de formation de liaisons carbone-carbone et carbone-azote." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0128/document.

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Les catalyseurs supportés sur des dendrimères et nanoparticules magnétiques acquièrent actuellement une importance accrue dans le contexte de la chimie verte et du développement durable car ils sont séparés facilement des produits de réaction par filtration ou à l’aide d’un aimant et recyclables. Dans cet esprit, la thèse a été dédiée à la synthèse, à la caractérisation et aux applications catalytiques de catalyseurs moléculaires, nano-et dendritiques immobilisés impliquant le ruthénium, le cuivre et le palladium. Les catalyseurs magnétiquement recyclables de ruthenium (II), de cuivre (I) et d

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31

Werheid, Matthias. "Synthese, Charakterisierung und Selbstassemblierung von Palladium-basierten Nanomaterialien." 2019. https://tud.qucosa.de/id/qucosa%3A72794.

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Die vorliegende Arbeit befasst sich mit synthetischen Ansätzen zur Verbesserung der Handhabung von Pd-Nanopartikeln in der heterogenen Umwelt- und Elektrokatalyse. Nanopartikuläres Pd an Magnetit sowie an Silica-Sphären mit Magnetit-Kern erreichten eine hohe Aktivität bei der Dechlorierung von Hexachlorbenzol. Im Gegensatz zu ungeträgerten Nanopartikeln gelang die Abtrennung jener mit einem Magnet aus der Reaktionslösung. Weitere Untersuchungen ergaben, dass die Shewanella oneidensis eine heterogene Keimbildung im mikrobiellen Herstellungsverfahren von Pd-Nanomaterialien vermittelte. Die Mikro

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32

Dietrich, Sascha. "(Metallo-)Dendrimers in Catalysis, Nanoparticle Stabilization and Biological Application." Doctoral thesis, 2011. https://monarch.qucosa.de/id/qucosa%3A19636.

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(Metallo-)Dendrimers in Catalysis, Nanoparticle Stabilization and Biological Application Technische Universität Chemnitz, Fakultät für Naturwissenschaften Dissertation 2011, 165 Seiten Die vorliegende Dissertationsschrift befasst sich mit der Darstellung, Charakterisierung und Anwendung neuartiger (Metallo-)Dendrimere. Den Schwerpunkt der Arbeit bildet dabei die terminale Funktionalisierung (Poly)amidoamin-basierender Dendrimere kleiner Generationen. Durch Standardpeptid-Knüpfungsreaktionen von 1,1´-(Diphenylphosphino)ferrocen-carbonsäure an dendritische (Poly)amidoamine ist eine Serie ent

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33

Ziegler, Christoph. "Syntheses and Assemblies of Noble Metal Nanostructures." Doctoral thesis, 2012. https://tud.qucosa.de/id/qucosa%3A26369.

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Shape and size control as well as the control of the assembly of nanostructures are current challenges in nano sciences. Focussing on metal nanostructures all of these aspects have been addressed in the frame of the present work. It was possible to develop a new aqueous seeded growth method that produces gold nanoparticles with adjustable diameters over a large range of sizes. The spherical particles obtained show very low polydispersities and a good long term stability. Furthermore it was possible to reveal the growth mechanism of these particles utilizing electron microscopy and optical inve

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34

Nowitzki, Tobias [Verfasser]. "Modellkatalytische Untersuchungen an nanostrukturierten Goldoberflächen und Kobalt-Palladium-Nanopartikeln unter Ultrahochvakuumbedingungen / von Tobias Nowitzki." 2008. http://d-nb.info/99093683X/34.

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35

Li, Hui. "Catalytic activity versus platinum-palladium nanoparticle size in low-temperature nitrogen monoxide reduction with hydrogen." 2010. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1473575.

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36

Huang, Yung-Han, and 黃永漢. "The effect of styrene oligomer-palladium nanoparticle addition on gas separation performance of polymeric membrane." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/58xjgu.

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碩士<br>南亞技術學院<br>材料應用科技研究所<br>99<br>In this thesis, various concentrations of polystyrene-based oligomer-Pd (S-Pd) nanoparticle were added into a polycarbonate matrix. Then, oligomer-Pd (S-Pd) nanoparticle\polycarbonate was cast for preparing a polycarbonate mixed matrix membrane using the dry-phase separation method. The effect of nanoparticle concentration on gas separation phenomena of S-Pd/PC mixed matrix membrane was discussed. SEM results showed that aggregation of nanoparticle in S-Pd/PC mixed matrix membrane occurred when the concentration of S-Pd nanoparticle increased. DSC and DMA re

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37

(10712736), Toma Bhowmick. "SYNTHESIS OF GOLD NANOPARTICLE CATALYSTS USING A BIPHASIC LIGAND EXCHANGE METHOD AND STUDY OF THEIR ELECTROCATALYTIC PROPERTIES." Thesis, 2021.

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<div><br></div><div><p>Noble metal nanoparticles have been studied extensively as heterogeneous catalysts for electrocatalytic and thermal reactions. In particular, the support material for the catalytic species is known to play a role in influencing the geometric and electronic properties of the active site as well as its catalytic performance. Polycrystalline gold electrodes have been used as a support to modify the electrocatalytic behavior of adsorbed molecular species. Here, we have studied two electrocatalytic processes- the hydrogen evolution reaction (HER) and the oxygen reduction reac

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38

MARTYKÁNOVÁ, Denisa. "Nové nanočástice v ultrastrukturální diagnostice." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-173091.

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The aim of this master thesis is to focus on a various methods of the conjugation of palladium nanoparticles of different shapes on the protein. The main point was to use both covalent and non-covalent conjugation of palladium nanoparticles on the protein and to use the functional conjugates to find out their stability in time.

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