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Dissertations / Theses on the topic 'Pourbaix Diagram'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 February 2022

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1

Liu, Lu. "Exploration de la chimie de l'astate en solution : focalisation sur le diagramme de Pourbaix en milieu non complexant et caractérisation de liaisons halogènes induites par l'astate." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2020. http://www.theses.fr/2020IMTA0205.

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L'astate (At, Z = 85) est un élément halogène rare, tous ses isotopes étant radioactifs. En raison des quantités disponibles limitées, aucun outil spectroscopique n'est applicable pour identifier la nature moléculaire des espèces d'At. En conséquence, la chimie de l'At reste méconnue. L'un de ses isotopes, ²¹¹At, est un candidat potentiel pour le traitement de cancers par thérapie alpha ciblée. Cependant, la connaissance limitée de ses propriétés chimiques a entravé les tentatives de marquage de ²¹¹At avec des molécules porteuses ciblant la maladie. Cela a conduit au développement d’un program

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2

MOTOKI, YOSHIDA. "Synthesis of Ruthenium-based Water Oxidation Catalysts and Mechanistic Study." Thesis, KTH, Skolan för kemivetenskap (CHE), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-173843.

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Two series of new mononuclear ruthenium complexes with hydrophobic or hydrophilic ligands [Ru(bda)L2] and [Ru(pdc)L3] (H2bda = 2,2'-bipyridine-6,6'-dicarboxylic acid; H2pdc = 2,6-pyridinedicarboxylic acid; L = pyridyl ligands) were synthesized and their electrochemical properties and catalytic activity toward water oxidation were examined. It was revealed that the hydrophobic ligands introduced to [Ru(bda)L2 ] improved the catalytic performance, ahnost twofold TON and TOF values were achieved compared to the [Ru(bda)] catalyst with hydrophilic ligands. The cyclic voltammogram of [Ru(bda)L2] ex

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3

Ning, Jing. "The Role of Iron Sulfide Polymorphism in Localized Corrosion of Mild Steel." Ohio University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1476660078407962.

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4

Addis, Kyle A. "A Corrosion Model for Production Tubing." Ohio University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1417085983.

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5

Tanupabrungsun, Tanaporn. "Thermodynamics and Kinetics of Carbon Dioxide Corrosion of Mild Steel at Elevated Temperatures." Ohio University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1355328679.

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6

Basly, Jean-Philippe. "Caracterisation de inp par des methodes electrochimiques : spectroscopie d'impedance et methodes potentiostatiques." Caen, 1988. http://www.theses.fr/1988CAEN2002.

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7

Zhang, Wei. "Initiation and Propagation of Localized Corrosion of Mild Steel in Marginally Sour Environments." Ohio University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1605039352183903.

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8

Sutter, Eliane. "Contribution a l'etude de la reactivite de la surface du titane en solution acide." Université Louis Pasteur (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR13131.

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9

Gao, Shujun. "Thermodynamics and Kinetics of Hydrogen Sulfide Corrosion of Mild Steel at Elevated Temperatures." Ohio University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1528836064560164.

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10

Mogwase, Boitumelo Mmamopedi Sarah. "An electrochemical study of the oxidation of platinum employing ozone as oxidant and chloride as complexing agent / by B.M.S. Mogwase." Thesis, North-West University, 2012. http://hdl.handle.net/10394/9790.

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Motor car exhaust catalysts are some of the most important users of platinum, and much attention is given to the recycling of scrap platinum from spent exhaust systems. The dissolution of platinum from waste exhausts was previously only possible by pyrometallurgical processes or by the use of aggressive chemicals, such as aqua regia and cyanide, all of which, however, cause pollution problems. Recently the potential for the development of hydrometallurgical processes was identified. These processes are more efficient and more environmentally friendly than traditional processes. It was the aim

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11

Robouch, Piotr. "Contribution a la prevision du comportement de l'americium, du plutonium et du neptunium dans la geosphere, donnees chimiques." Université Louis Pasteur (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR13230.

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Etude de l'hydrolyse de l'am. Solubilite de am::(2)(co::(3))::(3) en milieu naclo::(4) 3m ; seuls les complexes am (co::(3))::(i)**(3-i) ont ete trouves. Calcul des constantes de stabilite. Formation de complexes entre am et les matieres humiques. Mesure de la solubilite de puo::(2)co::(3) en milieu hco::(3)**(-)/naclo::(4). Diagrammes de pourbaix, utiles pour la speciation de np, pu et am dans differentes eaux naturelles souterraines

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12

Vasquez, Ferdinand. "THE EFFECT OF FREE CHLORINE AND CHLORAMINES ON LEAD RELEASE IN A DISTRIBUTION SYSTEM." Master's thesis, University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3654.

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Total lead release in drinking water in the presence of free chlorine and chloramine residuals was investigated in field, laboratory and fundamental investigations for finished waters produced from ground (GW), surface (SW), saline (RO) and blended (B) sources. Field investigations found more total lead was released in the presence of chloramines than in the presence of free chlorine for RO and blended finished waters; however, there were no statistical differences in total lead release to finished GW and SW. Laboratory measurements of finished waters oxidation-reduction potential (ORP) were e

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13

Champion, J. "Exploration du caractère métallique de l'astate en solution aqueuse." Phd thesis, Université de Nantes, 2009. http://tel.archives-ouvertes.fr/tel-00450909.

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L'alpha-radiothérapie est une technique particulièrement innovante de thérapie des cancers, tout en étant complémentaire des thérapies déjà existantes. Elle repose sur l'utilisation d'un vecteur spécifique (anticorps ou peptide) de la cellule cible à détruire, radiomarqué par un élément radioactif émetteur alpha. L'astate 211 est un candidat particulièrement intéressant compte tenu de l'énergie des particules α qu'il émet et de sa période physique (7,2 h). L'une des voies de marquage envisagée est l'utilisation de l'astate à un degré d'oxydation supérieur à zéro en tant que cation. En effet, l

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14

Stavinoha, Jakub. "Koroze oceli a hliníku ve vybraných prostředích." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-228957.

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This Master’s thesis is related to corrosion degradation processes on metal surfaces exposed in different environments. The theoretical part is concern with basic principles in electrochemical and atmospheric corrosion. Practical part describes experimentation of corrosion process of aluminium (99,5) and low carbon steel (11321) in two different atmospheric environments. The conclusion of thesis includes evaluations of the results from practical part and comparison with the theoretical part.

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15

CHENG, HSU, and 鄭旭. "First-principles study on pourbaix diagram of metal oxides." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/3k5zz7.

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碩士<br>國立中正大學<br>物理系研究所<br>106<br>Pourbaix diagram is useful for understanding corrosion condition of metals in specific environment. In this thesis, we use an efficient scheme which combine first principle calculation of solids with experimental Gibbs free energies of arbitrary aqueous states. Using this scheme, we will construct the Potential/pH diagrams (Pourbaix diagrams) for Mn, Fe and Al. We will also study the effect of doping of CaO on the Potential/pH diagrams of ceramic materials(Al2O3).

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16

Lin, Chih-wei, and 林子瑋. "Phase equilibria, Pourbaix diagram and corrosion properties of dental-arch-wire-used shape memory alloys." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/q3fqkt.

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17

Sun, Yi-Pin, and 孫依嬪. "Pourbaix Diagrams Study of Electrochemical Prepared Manganese Oxides." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/15526588522720703089.

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碩士<br>國立暨南國際大學<br>應用化學系<br>94<br>One-dimensional tunnel-structured manganese oxides have been intensively investigated for several decades because of their economic value and potential applications in molecular sieve, catalyst of fuel cell and cathode material of lithium ion battery. The structure of resultant manganese oxides is very sensitive to the synthetic routes. This research has demonstrated a room temperature electrochemical synthesis in preparing α- octahedral molecular sieve. The correlations between Pourbaix diagram and counter ion were investigated. The dependence of structure

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18

Palazhchenko, Olga. "Pourbaix diagrams at elevated temperatures: a study of Zn and Sn." Thesis, 2012. http://hdl.handle.net/10155/276.

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Metals in industrial settings such as power plants are often subjected to high temperature and pressure aqueous environments, where failure to control corrosion compromises worker and environment safety. For instance, zircaloy (1.2-1.7 wt.% Sn) fuel rods are exposed to aqueous 250-310 oC coolant in CANDU reactors. The Pourbaix (EH-pH) diagram is a plot of electrochemical potential versus pH, which shows the domains of various metal species and by inference, corrosion susceptibility. Elevated temperature data for tin +II and tin +IV species were obtained using solid-aqueous phase equilibria wit

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19

Chu, Yi-Min, and 朱益民. "First-Principles Studies of GaN/Ga2O3 Heterointerfaces and Pourbaix Diagrams for Ga2O3." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/4q9jvh.

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碩士<br>國立中興大學<br>精密工程學系所<br>101<br>First-principles calculations were used to determine the heteroepitaxial growth behavior of GaN (0001) on Ga2O3(-201) templates and the Pourbaix diagram of Ga2O3. The relative stability of eight different models of the GaN(0001)/Ga2O3(-201) interface is examined as a function of the valence band offset. The most favorable interface consists of N─Ga bonds at the GaN(0001)/Ga2O3(-201) interface. This interface structure agree with previously reported experimental and theoretical results of the surface treatment of N exposure on the Ga2O3 surface. The potential

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20

Medupe, Elizabeth. "An electrochemical investigation of the dissolution of platinum employing AICI3/HNO3 / Elizabeth Medupe." Thesis, 2014. http://hdl.handle.net/10394/15413.

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Industrial activities of mankind are feared to damage the environment irretrievably. Especially the release of huge amounts of harmful gases causes concern. In this regard the environmental pollution caused by the one billion motor vehicles on earth is particularly important. The platinum-group metals (PGM) are well known for their catalytic activity. They are used extensively for reducing the amounts of hydrocarbons, carbon monoxide and nitrogen oxides from the exhausts gas emitted by automobiles. In 2012 20% of platinum and 27% of palladium produced were used in the manufacture of catalytic

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21

SHU-YI, CHU, and 朱書儀. "Theoretical Pourbiax Diagrams of Ru-Polypyridyl Complexes: A Innocent and Non-innocent Ligand Comparison for Water Oxidation Catalysis." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/28930637507261564334.

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碩士<br>國立臺灣師範大學<br>化學系<br>102<br>Water oxidation is a key half-reaction (2H2O → O2 + 4H+ + 4e−) employed in solar-fuel-based energy conversion, and it is dominated by proton-coupled electron transfer (PCET), given its multi-electron, multi-proton character. Mononuclear Ru-based water oxidation catalysts (WOCs) are a valuable class of WOCs used for water splitting. Noninnocent ligands (NILs) have three oxidation states, NILOx, NIL•, and NILRed, that have an electron redox transformation in common. NILs can help disperse the electron density at the metal center and keep the metal center in low ox

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