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Dissertations / Theses on the topic 'Platinum Dioxide'

Author: Grafiati

Published: 6 September 2023

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1

Chu, Yang. "Enhancement of Photocatalytic Activity by Site Poisoning Platinum Doped Titanium Dioxide." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1417454495.

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2

Bayrakceken, Ayse. "Platinum And Platinum-ruthenium Based Catalysts On Various Carbon Supports Prepared By Different Methods For Pem Fuel Cell Applications." Phd thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609448/index.pdf.

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Proton exchange membrane fuel cells are one of the most promising hydrogen energy conversion devices for portable, mobile and stationary applications. For wide spread usage to produce electricity platinum loading has to be decreased by using highly active electrocatalysts. Even 10 ppm carbon monoxide or higher than 30% carbon dioxide cause performance losses via deactivation which can be diminished by using binary catalysts. The aim of this thesis is to develop new platinum based electrocatalysts with high catalytic activity and to overcome the problems due to the deactivation. platinum and pl

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3

Ozcan, Ozlem. "Artificial Photosynthesis: Dye Assisted Photocatalytic Reduction Of Carbon Dioxide Over Pure And Platinum Containing Titania." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606313/index.pdf.

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The aim of this study is to test the limits of photocatalytic reduction of CO2 over Pt and light harvesting dye promoted TiO2 films under UV and visible light. Thick and thin TiO2 film catalysts are coated onto 1 cm long glass beads via a common sol-gel procedure and dip coating technique. TiO2 thin films were promoted by Pt and three different light harvesting molecules: RuBpy (Tris (2,2&rsquo<br>&ndash<br>bipyridyl) ruthenium (II) chloride hexahydrate) , BrGly (1,7-dibromo-N,N&rsquo<br>-(t-butoxycarbonyl-methyl)-3,4:9,10-perylene-diimide) and BrAsp (1,7-dibromo-N,N&rsquo<br>-(S-(1-t-butoxy-c

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4

Photinon, Kanokorn. "DEVELOPMENT OF DIMETHYL ETHER (DME) AND CARBON DIOXIDE SENSORS USING PLATINUM NANOPARTICLES AND THICK FILM TECHNOLOGY." Case Western Reserve University School of Graduate Studies / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=case1164899809.

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5

Motsegood, Perry Nelson. "Improved performance of alkaline batteries via magnetic modification and voltammetric detection of breath acetone at platinum electrodes." Diss., University of Iowa, 2012. https://ir.uiowa.edu/etd/4883.

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Incorporation of magnetic microparticles (~ 1 um) at electrode structures increases electron transfer e¢ ciency, observed as increased current, for multiple electrochemical systems. Current increases occur with magnetic field. Inclusion of magnetic materials into the cathode matrix of alkaline MnO2 batteries requires the materials to be stable in the strong base electrolyte, typically 6 to 9 M KOH. Samarium cobalt magnetic particles sustain strong permanent magnetic fields and are stable in base without surface modificatio

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6

Grant, Ann W. "Surface studies of model catalysts using metal atoms and particles on ZnO(0001)-Zn and -O and TiO₂(110) /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/8499.

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7

Falch, Anzel. "Synthesis, characterisation and potential employment of Pt–modified TiO2 photocatalysts towards laser induced H2 production / Falch A." Thesis, North-West University, 2011. http://hdl.handle.net/10394/7346.

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The photocatalytic production of H2 from water as well as from a 1:1 methanol:water solution employing pre–treated TiO2 and various Pt–TiO2 photocatalysts was studied by using an Nd:YAG laser as irradiation source. The photocatalysts (0.5–, 1–, 1.5– and 2 wt% Pt–TiO2) were prepared by utilizing a photocatalytic reduction method after which characterisation by various analytical techniques, i.e. XRD, TEM, ICP, SEM, and EDX, were conducted. XRD clearly indicated that platinum was not present in the crystal structure of TiO2, but was rather loaded onto the surface of TiO2. TEM analysis confirmed

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8

Soufi, Jihène. "Traitement des gaz d’échappement des groupes électrogènes alimentés par des gasoils, fuels marines ou bio-huiles : élimination des HAP en présence ou non de SOx." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1120.

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9

Ponczek, Milena 1986. "Degradação de compostos orgânicos voláteis em fase gasosa através da fotocatálise com luz UV, TiO2 e TiO2/Pt." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266075.

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Orientador: Edson Tomaz<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-26T01:40:52Z (GMT). No. of bitstreams: 1 Ponczek_Milena_M.pdf: 3719180 bytes, checksum: efe8192ba2f868976819b64f089b973c (MD5) Previous issue date: 2014<br>Resumo: Compostos orgânicos voláteis, ou COV, são uma importante classe de poluentes do ar comumente encontrados na atmosfera ao nível do solo, nos centros urbanos e industriais. O tratamento de COV provenientes de fontes industriais através da fotocatálise heterogênea é uma técnica

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10

Modingwane, Boitshoko Goitseone. "Investigation of Pt supported on carbon, ZrO2, Ta2O5 and Nb2O5 as electrocatalysts for the electro–oxidation of SO2 / Boitshoko Goitseone Modingwane." Thesis, North-West University, 2011. http://hdl.handle.net/10394/5557.

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The gradual depletion of and dependence on fossil fuels, air pollution and global warming have all accelerated the development of alternative energy systems which use hydrogen as an energy carrier. The hybrid sulphur cycle (HyS) is the foremost electrothermochemical process that can produce hydrogen as the energy carrier. The HyS cycle consists of two units, namely the sulphuric acid decomposition reactor and the sulphur dioxide electrolyser (SDE). The SDE is responsible for the SO2 electrooxidation to sulphuric acid and protons at the anode and the electro–reduction of protons to hydrogen at

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11

NAKAMURA, LIANA K. O. "Atividade fotocatalítica de filmes nanoestruturados de dióxido de titânio incorporados com nanopartículas de metais nobres." reponame:Repositório Institucional do IPEN, 2012. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10170.

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Made available in DSpace on 2014-10-09T12:35:34Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:04:01Z (GMT). No. of bitstreams: 0<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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12

Großmann, Katharina [Verfasser]. "Detection mechanism of reducing gases and influence of water on tin dioxide based gas sensors : Differences in surface chemistry between undoped and platinum doped materials / Katharina Großmann." Aachen : Shaker, 2013. http://d-nb.info/1051575494/34.

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13

Barroo, Cédric. "Processus non-linéaires au cours de l'hydrogénation du NO2 sur catalyseurs à base de platine et de rhodium." Doctoral thesis, Universite Libre de Bruxelles, 2014. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209252.

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Le travail de thèse propose d’éclaircir les dynamiques qui régissent les réactions d’hydrogénation du dioxyde d’azote (NO2) se déroulant à la surface de catalyseurs modèles de platine, de rhodium et de leur alliage Pt-Rh. Une meilleure compréhension de la réaction catalytique en conditions réactionnelles permettrait, à terme, un meilleur contrôle de la réaction. De manière similaire, le comportement du catalyseur permettrait d’orienter la synthèse de catalyseurs afin d’en augmenter la sélectivité et/ou activité. La structure de ces catalyseurs ainsi que l’analyse des processus sont effectuées

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14

Ferrandon, Magali. "Mixed metal oxide - noble metal catalysts for total oxidation of volatile organic compounds and carbon monoxide." Doctoral thesis, Stockholm, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3156.

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15

DRESCH, MAURO A. "Aplicação de catalisadores PtSn/C e membranas Nafion-SiOsub(2) em células a combustível de etanol direto em elevadas temperaturas." reponame:Repositório Institucional do IPEN, 2014. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10633.

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Made available in DSpace on 2014-10-09T12:42:37Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:01:33Z (GMT). No. of bitstreams: 0<br>Tese (Doutorado em Tecnologia Nuclear)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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16

Kaczmarek, Thibault. "Impact des éléments platinoïdes et du molybdène dans les mécanismes de dissolution du dioxyde d'uranium." Thesis, Université de Montpellier (2022-….), 2022. http://www.theses.fr/2022UMONS014.

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Le combustible usé contient de nombreux produits de fission dont les éléments platinoïdes (Ru, Rh et Pd) et le molybdène. Ces produits de fission se retrouvent essentiellement dans le combustible usé sous forme de précipités métalliques. La première étape du retraitement est la dissolution du combustible en milieu acide nitrique concentré. Ce travail de thèse vise à déterminer l’impact de ces éléments, incorporés sous forme de particules métalliques au sein de la matrice UO2, sur la cinétique et les mécanismes de la dissolution. Dans ce cadre, plusieurs systèmes modèles à base de UO2 incorpora

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17

Chen, Hsiao-Hui. "Formation of low temperature silicon dioxide films using chemical vapor deposition /." Online version of thesis, 1991. http://hdl.handle.net/1850/11160.

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18

Taimoor, Aqeel Ahmad. "Biogas valorization for chemical industries via catalytic process." Thesis, Lyon 1, 2010. http://www.theses.fr/2010LYO10243/document.

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La production de l'hydrogène à partir de biomasse est actuellement à l'étude mais la méthode de valorisation du biogaz (mélange H2/CO2) par réactions catalytiques, autres que la simple combustion, n'a pas encore été retenue. Par conséquent, le principal objectif de ce travail est d'explorer les autres voies. L'effet du CO2 sur le système catalytique est mal connu et seulement un effet négatif sur la dissociation de l'hydrogène a été mentionné. L'hydrogénation du toluène sur un catalyseur Pt a d'abord été étudiée sans CO2 pour suivre son comportement et éventuellement sa perte d'activité. En pr

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19

Ali, Abdulkahhar. "Etudes electrochimique et chromatographique de la photooxydation des alcools primaires aliphatiques sur des suspensions de catalyseurs a base de dioxyde de titane." Poitiers, 1988. http://www.theses.fr/1988POIT2262.

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20

Neogi, Sudarsan. "Chemical vapor deposition of silicon dioxide thin films for composite thermo-oxidative durability." Ohio : Ohio University, 1992. http://www.ohiolink.edu/etd/view.cgi?ohiou1173753842.

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21

Tengsuwan, Siwach. "Environmentally-benign Electroless Nickel-Phosphorus Plating on Thermoplastic Polymers using Co-polymer based Hydrophilic Modification and Supercritical Carbon Dioxide Pd-complex Infusion." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/188620.

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22

Peronio, Angelo. "A closer look at heterogeneous catalysis: reaction intermediates at the single-molecule level." Doctoral thesis, Università degli studi di Trieste, 2013. http://hdl.handle.net/10077/8577.

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2011/2012<br>The present work pertains to the surface science approach to heterogeneous catalysis. In particular model systems for CO2 hydrogenation to methanol, and NO selective catalytic reduction, are investigated by means of a combined approach, where the molecular-level insight provided by a low-temperature scanning tunneling microscope is complemented by density functional theory (DFT) calculations of their electronic structure. To this end, the Inelastic Electron Tunneling Spectroscopy (STM-IETS) technique was introduced for the first time in our laboratory, a recent development which

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23

Jordaan, Ilse. "Persistent organic pollutants (POPs) associated with a platinum mine in the Limpopo Province, South Africa / Ilse Jordaan." Thesis, North-West University, 2005. http://hdl.handle.net/10394/995.

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South Africa ratified the Stockholm Convention (SC), which became legally binding on 17 May 2004. This Convention targets 12 particularly toxic persistent organic pollutants (POPs) for virtual elimination. The Convention also requires parties to reduce the release of organochlorine pesticides and the intentionally- and unintentionally-produced POPs such as dioxins, furans and polychlorinated biphenyls (PCBs) (referred to as dioxin-like chemicals). Dioxins are a heterogeneous mixture of chlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) congeners. These substances were never intentionall

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24

Bertin, Thierry. "Elimination par voie catalytique des oxydes d'azote émis lors du fonctionnement des moteurs "Diesel" et des moteurs "essence mélange pauvre"." Poitiers, 1998. http://www.theses.fr/1998POIT2260.

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Ce travail est consacre a l'etude de l'elimination par voie catalytique des oxydes d'azote emis lors du fonctionnement des moteurs diesel et essence melange pauvre. Differents catalyseurs ont ete etudies. Il s'agit d'oxydes simples (al#2o#3, sno#2, fe#2o#3) seuls ou en melange, d'oxydes mixtes (perovskites) et de metaux supportes (pt / support). Seuls certains oxydes (nd#2cuo#4, sno#2-al#2o#3) ont une activite significative en reduction (presence de propene dans le melange reactionnel) et en decomposition (absence de reducteur) des no#x. Pour ces catalyseurs, le domaine d'activite se situe ent

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25

Urfels, Laetitia. "Oxydation du méthane à basse température sur des catalyseurs à base de métaux précieux : application à l'échappement des véhicules GNV fonctionnant en mélange pauvre." Lyon 1, 2003. http://www.theses.fr/2003LYO10088.

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Cette étude concerne l'oxydation totale du méthane à basse température sur des catalyseurs à base de Pd et/ou de Pt. L'application visée est l'épuration des échappements des moteurs fonctionnant au gaz naturel et en mélange pauvre. La problématique est que l'eau et les composés soufrés présents dans les effluents, sont susceptibles de limiter l'activité des catalyseurs utilisés. Les catalyseurs Pd/Al2O3 et Pt/Al2O3 ont été retenus comme systèmes de référence dans la réaction considérée. En absence et en présence d'eau dans le mélange réactionnel, le catalyseur Pd/Al2O3 est le plus actif. Il es

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26

Montméat, Pierre. "Rôle d'éléments métalliques sur les mécanismes de détection d'un capteur de gaz à base de dioxyde d'étain. Application à l'amélioration de la sélectivité à l'aide d'une membrane de platine." Phd thesis, Ecole Nationale Supérieure des Mines de Saint-Etienne, 2002. http://tel.archives-ouvertes.fr/tel-00125693.

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Ce travail est relatif au développement de microcapteurs de gaz sélectifs. De façon générale, ces dispositifs sont composés d'un oxyde semi-conducteur, le dioxyde d'étain, associé à deux électrodes métalliques. L'objectif de l'étude est double, d'une part, améliorer la sélectivité par dépôt de filtre catalytique métallique, et d'autre part mieux appréhender les interactions entre l'oxygène, les métaux qu'ils soient utilisés sous forme d'électrode ou de membrane et le dioxyde d'étain.<br /><br />Le dépôt d'un film mince de platine sur une couche épaisse de 20 μm de dioxyde d'étain a permis d'am

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27

Taimoor, Aqeel Ahmad. "Valorisation de biogaz pour industrie chimie par voie catalytique." Phd thesis, Université Claude Bernard - Lyon I, 2010. http://tel.archives-ouvertes.fr/tel-00881030.

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La production de l'hydrogène à partir de biomasse est actuellement à l'étude mais la méthode de valorisation du biogaz (mélange H2/CO2) par réactions catalytiques, autres que la simple combustion, n'a pas encore été retenue. Par conséquent, le principal objectif de ce travail est d'explorer les autres voies. L'effet du CO2 sur le système catalytique est mal connu et seulement un effet négatif sur la dissociation de l'hydrogène a été mentionné. L'hydrogénation du toluène sur un catalyseur Pt a d'abord été étudiée sans CO2 pour suivre son comportement et éventuellement sa perte d'activité. En pr

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28

Farias, Manuel de Jesus Santiago. "Eletrooxidações de acetaldeído comum e etanol isotopicamente marcado (H3 13C-12CH2OH) em superfície de platina policristalina acompanhadas por FTIRS in situ." Universidade Federal do Maranhão, 2006. http://tedebc.ufma.br:8080/jspui/handle/tede/1561.

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Submitted by Rosivalda Pereira (mrs.pereira@ufma.br) on 2017-06-02T18:48:59Z No. of bitstreams: 1 ManuelFarias.pdf: 1389622 bytes, checksum: 6e4849f2b44871723791cde342c7bf04 (MD5)<br>Made available in DSpace on 2017-06-02T18:48:59Z (GMT). No. of bitstreams: 1 ManuelFarias.pdf: 1389622 bytes, checksum: 6e4849f2b44871723791cde342c7bf04 (MD5) Previous issue date: 2006-06-19<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>This is work treat of the acetaldehyde and labeled ethanol oxidations, both kinds in percloric acidic medium, 0,1 Mol L-1 HClO4 on the Pt polycrys

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29

Savych, Maciejasz Juliia. "Synthèse et caractérisation de nanocomposites platine/nanofibres pour électrodes de pile à combustible à électrolyte polymère." Thesis, Montpellier 2, 2014. http://www.theses.fr/2014MON20152/document.

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Cette thèse s'inscrit dans le contexte général des efforts de recherche pour développer des supports de catalyseur résistant à la corrosion qui peuvent potentiellement remplacer le carbone dans les piles à combustible à électrolyte polymère. Des nanofibres et des nanotubes à base de TiO2 et SnO2 dopés par Nb ont été préparés par filage électrostatique et caractérisés par diffraction des rayons X, spectroscopie des photoélectrons de rayons X, spectroscopie Raman, mesures de surface spécifique et de conductivité électronique. Les nanofibres de TiO2 et SnO2 dopées par Nb présentent une conductivi

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30

Roth, Delphine. "Catalyseurs à base de métaux nobles pour l'oxydation totale du méthane : application au traitement des effluents des moteurs fonctionnant au gaz naturel." Lyon 1, 2000. http://www.theses.fr/2000LYO10113.

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31

Tsai, Ya-Han, and 蔡雅涵. "Development of Nanosized-Platinum Deposited Titanium Dioxide for Electroanalytical Applications." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/4bpv2d.

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碩士<br>國立中興大學<br>化學系所<br>101<br>The thesis is divided into two major parts. The first part focuses on the development of composite platinum nanoparticles -titanium dioxide (PtNP/TiO2) and the second part deals with its application as an electrochemical sensor. We use hexachloroplatinic acid solution (H2PtCl6) as a precursor in photo- reduction of platinum nanoparticles on TiO2. In order to understand the best condition for the fabrication of PtNP/TiO2, the influences of pH values, Pt and titanium dioxide concentration were investigated. Both Transmission Electron Microscopy (TEM) and Energy Dis

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32

Li, Chien-Jen, and 李健仁. "Molecular Dynamics simulation of Carbon Dioxide adsorption on graphite and platinum surfaces." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/dhtrgt.

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碩士<br>國立臺北科技大學<br>製造科技研究所<br>96<br>This study puts CO2 in the system which affiliation two piece of flake graphite limit. To change 5 kind of surface energy (ε*=1、1.58、2.24、3.16、4.47),3 kind of temperature(240K、260K、280K) and 3 kind of density(ρ*=0.293、0.39、0.44). The results show that more CO2 change liquid from gas in surface energy is 4.47,the lowest temperature is 240K, and the highest density is 0.44. In this system, the adsorption is controlled by adsorptive energy at boundary, escaptive energy of temperature, and variation of density. We also puts CO2 in two piece of Pt limit to compare

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33

Kuo, Chia-Hsun, and 郭佳勳. "Effect of Gold on Platinum Catalyst for Carbon Dioxide Reforming of Methane Reaction." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/37043204484130659671.

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34

CHUANG, YI-HSUAN, and 莊易軒. "Fabrication of Phosphorene Modified Titanium Dioxide Photoelectrode and Silver Modified Platinum Counter Electrode for Dye-sensitized Solar Cells under Low Illumination." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/9ask5v.

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碩士<br>國立雲林科技大學<br>電子工程系<br>106<br>In this study, phosphorene was mixed with titanium dioxide (TiO2) colloid and deposited on fluorine-doped tin oxide (FTO) conductive substrate by doctor blade method as the photoelectrode of dye-sensitized solar cell (DSSC). The reason is because phosphorene has high electron mobility and high absorption, which could enhance the electron transfer ability and increase the recombination resistance, thus improve the current density. The surface morphology of phosphorene film was characterized by field-emission scanning electronic microscopy (FE-SEM). The optical

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35

Kuvarega, Alex Tawanda. "Photocatalytic performance of nitrogen-platinum group metal co-doped Tio2 supported on carbon nanotubes for visible-light degradation of organic pollutants in water." Thesis, 2013. http://hdl.handle.net/10210/8533.

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D.Phil. (Chemistry)<br>Elimination of toxic organic compounds from wastewater is currently one of the most important subjects in water-pollution control. Among the many organic pollutants are dyes and emerging pollutants such as natural organic matter (NOM). Dyes such as Eosin Yellow (EY), an anionic xanthene fluorescent dye, can originate from many sources such as textile industrial processes, paper pulp industries and agricultural processes. Most dyes are problematic because they are resistant to conventional chemical or biological water-treatment methods and therefore persist in the environ

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36

Siame, John. "Study on selective precipitation of platinum and base metals in liquid-liquid and gas-liquid chloride systems : focus on conceptual process design." Thesis, 2012. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1000297.

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D. Tech. Chemical, Metallurgical and Materials Engineering<br>This study provides experimental data and new perspectives on selective precipitation of platinum group metals (PGMs) in the presence of base metals while at the same time reviewing the mass transfer characteristics and models associated with metal sulphides precipitation in liquid-liquid and gas-liquid systems. In this study, the objective was to investigate and validate the concept of selective precipitation of platinum from chloride media using sulphur-bearing liquids or gases.

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37

Basu, Nivedita. "Exploration of Materials and Platforms for the Development of a Label-free Electrochemical DNA Sensor." Thesis, 2017. http://etd.iisc.ac.in/handle/2005/4309.

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The aim of the studies presented in this thesis was to explore various materials and platforms for the detection of DNA in order to develop a cost-effective, repeatable and reproducible electrical/electrochemical DNA sensor. Chapter 1 is a review chapter consisting of a comparative study of the fundamental working principle, fabrication process, characteristics and performance of different types of DNA biosensors and a detailed discussion on the progress in the development of DNA biosensors. The studies described in Chapter 2 focuses on the development of a flexible, label-Free DNA Sensor

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38

Mukri, Bhaskar Devu. "Synthesis, Structure and Catalytic Properties of Pd2+, Pt2+ and Pt4+ Ion Substituted TiO2." Thesis, 2013. http://etd.iisc.ac.in/handle/2005/3346.

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After introducing fundamentals of catalysis with noble metal surfaces especially Pt metal for CO oxidation and subsequent developments on nano-crystalline Pt metals supported on oxide supports, an idea of Pt ion in reducible oxide supports acting as adsorption sites is proposed in chapter 1. Idea of red-ox cycling of an ion in an oxide matrix is presented taking Cu ion in YBa2Cu3O7 as an example. Noble metal ions in reducible oxides such as CeO2 or TiO2 acting as adsorption sites and hence a red-ox catalyst was arrived at from chemical considerations. Among several reducible oxide supports, Ti

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39

Mukri, Bhaskar Devu. "Synthesis, Structure and Catalytic Properties of Pd2+, Pt2+ and Pt4+ Ion Substituted TiO2." Thesis, 2013. http://etd.iisc.ernet.in/2005/3346.

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After introducing fundamentals of catalysis with noble metal surfaces especially Pt metal for CO oxidation and subsequent developments on nano-crystalline Pt metals supported on oxide supports, an idea of Pt ion in reducible oxide supports acting as adsorption sites is proposed in chapter 1. Idea of red-ox cycling of an ion in an oxide matrix is presented taking Cu ion in YBa2Cu3O7 as an example. Noble metal ions in reducible oxides such as CeO2 or TiO2 acting as adsorption sites and hence a red-ox catalyst was arrived at from chemical considerations. Among several reducible oxide supports, Ti

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Steyn, Marthinus Hendrik. "Pt and Au as electrocatalysts for various electrochemical reactions / Marthinus Hendrik Steyn." Thesis, 2015. http://hdl.handle.net/10394/15579.

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In this study the focus was on the electrochemical techniques and aspects behind the establishment of the better catalyst (platinum or gold) for the sulphur dioxide oxidation reaction (SDOR). One of the primary issues regarding the SDOR is the catalyst material, thus the comparative investigation of the performance of platinum and gold in the SDOR, as found in this study. Ultimately, the SDOR could lead to an effective way of producing hydrogen gas, which is an excellent energy carrier. The electrochemical application of the oxygen reduction reaction (ORR) and ethanol oxidation reaction (EOR)

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Συρροκώστας, Γιώργος. "Ανάπτυξη και μελέτη ημιαγώγιμων και μεταλλικών νανοδομών για εφαρμογή σε φ/β κυψελίδες και φωτοηλεκτροχρωμικές διατάξεις". Thesis, 2013. http://hdl.handle.net/10889/6434.

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Στα πλαίσια της παρούσας διδακτορικής διατριβής μελετήθηκαν και αναπτύχθηκαν νανοδομημένα λεπτά υμένια διοξειδίου του τιτανίου (TiO2) και λευκόχρυσου (Pt) για χρήση σε ευαισθητοποιημένες φωτοβολταϊκές κυψελίδες. Αφού πραγματοποιήθηκε η μελέτη των υμενίων, παρασκευάστηκαν υμένια TiO2 και Pt και βελτιστοποιήθηκαν, ώστε να έχουν τις επιθυμητές ιδιότητες. Για το χαρακτηρισμό των υμενίων TiO2 χρησιμοποιήθηκε ηλεκτρονικό μικροσκόπιο σάρωσης (SEM) και περίθλαση ακτίνων X (XRD). Μάλιστα προτάθηκε η χρήση νιτρικού οξέος, ανάμεσα σε 4 διαφορετικά οξέα, για την αποτελεσματική διασπορά των σωματιδίων του

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Huang, Wen-Jiun, and 黃文駿. "Nitrogen Doped Titanium Dioxide Films Deposited by Arc Ion Plating." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/28647156382502797300.

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碩士<br>輔仁大學<br>物理學系<br>99<br>The purposes of this studyis to reduce the energy gap of TiO2 films by doping nitrogen, so that the films can still have phtocatalytic effect in visible light. This experiment consists of two parts. At the first part, we deposit TiO2 film by arc ion plating to understand its general characteristic. At the same time ,we observe the films surface structure by Electron Microscope(SEM) and Atomic Force Microscope(AFM) and find the best ellipsometry model to fit Optical constant. And then we use different nitrogen pressure to deposit the N-doped TiO2 films and fitting by

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Chiu, Te-Huang, and 邱德煌. "Dye-sensitized Titanium Dioxide Solar Cell Prepared by Arc Ion Plating." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/11691474771196409979.

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碩士<br>逢甲大學<br>材料科學所<br>93<br>The great demand for petrochemical energy has led to the development of alternative power sources, such as solar cells, recent years and is expected to be clean energy source of the future. Development of solar cells from silicon-based devices to the new dye-sensitized type, referred to as dye-sensitized solar cells (DSSC), is a great step forward in this area, such as simpler fabrication techniques and reduced costs. The most common DSSC under current development is the titanium dioxide based type. Various production methods have been developed to fabricate TiO2

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Su, Chih-Wei, and 蘇志偉. "A Study on the Preparation of Photocatalytic Titanium Dioxide Thin Film by Arc Ion Plating." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/cph2w9.

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碩士<br>逢甲大學<br>材料科學所<br>91<br>Titanium dioxide photocatalyst is well developed and wildly used due to its safety, highly catalytic activity, and self-cleaning properties. However, recycling of TiO2 powder is difficult. This motivates the development of TiO2 thin-films processes to extend its application. In this study, arc ion plating technique was used to deposit TiO2 films on glass substrate. The influence of three most effective deposition parameters - deposition time, oxygen partial pressure, and substrate bias were discussed respectively. The cross sectional morphology, surface morpho

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CHANG, MING-KAI, and 張洺愷. "Study on the Effect of Plating Parameters and Saccharin Content over the Properties of Nickel Coating Electroplated by Using Supercritical Carbon Dioxide Mixed with Deep Eutectic Solvents." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/pu8xhp.

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碩士<br>國立臺北科技大學<br>製造科技研究所<br>107<br>Deep eutectic solvent (DES) is a new generation of ionic liquids. It has the advantages of cheap raw materials, simple synthesis, non-toxic, biodegradable, non-flammable, non-volatile, high viscosity, easy to store and good solubility. DES has the potential to replace traditional aqueous solutions as a new generation of organic and inorganic solvents. Supercritical CO2 has low viscosity, low surface tension and high diffusivity. The coating prepared in supercritical CO2 environment has good coverage and uniformity. The supercritical CO2 process can increase

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Gaidi, Mounir. "FILMS MINCES DE SNO2 (DIOXYDE D'ETAIN) DOPES AU PLATINE OU AU PALLADIUM ET UTILISES POUR LA DETECTION DES GAZ POLLUANTS : ANALYSES IN-SITU DES CORRELATIONS ENTRE LA REPONSE ELECTRIQUE ET LE COMPORTEMENT DES AGREGATS METALLIQUES." Phd thesis, 1999. http://tel.archives-ouvertes.fr/tel-00010787.

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Nous avons analysé le rôle joué dans les processus de détection, par des agrégats métalliques de Pt et de Pd dispersés dans des films minces de SnO2 destinés à la détection des gaz polluants réducteurs comme le CO, H2S ou NOx. L'évolution de l'état d'oxydation des agrégats de platine a été suivie par Spectroscopie d'Absorption X (XAS) in situ. Lorsqu'elles sont incorporées en quantité très faible, les particules de platine changent, d'une façon réversible, leur état d'oxydation, selon la nature de l'atmosphère environnante. L'état d'oxydation des particules dépend fortement de leur taille, (en

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