Dissertations / Theses on the topic 'Aluminyl Anion'
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Wiesner, Anja [Verfasser]. "Aluminum and Gallium Pentafluoroorthotellurates: Novel Superacids and Weakly Coordinating Anions / Anja Wiesner." Berlin : Freie Universität Berlin, 2019. http://d-nb.info/119958326X/34.
Full textEvdokimov, Anton [Verfasser]. "Numerical laser welding simulation of dissimilar Steel-Aluminum overlap joints / Anton Evdokimov." Düren : Shaker, 2020. http://d-nb.info/122416816X/34.
Full textEl, Mouakibi Abderrahim. "Elaboration de particules submicroniques de taille et forme contrôlées d'hydroxyde d'aluminium." Université Louis Pasteur (Strasbourg) (1971-2008), 2008. http://www.theses.fr/2008STR13202.
Full textPowell, Christopher. "INDUCING ACTIVE SITES IN CLUSTERS: REACTIVITY OF Al13Ix- and Al14Iy- (x=0-2, y=2-4) WITH METHANOL." VCU Scholars Compass, 2011. http://scholarscompass.vcu.edu/etd/213.
Full textNégrier, Fabien. "Approche moléculaire de la préparation par imprégnation de catalyseurs NiOx/AI2O3 à partir de complexes [Ni(en)x(H2O)6-2x]X2 : rôle de l'amine chélatante et du contre-anion." Paris 6, 2002. http://www.theses.fr/2002PA066271.
Full textSong, Xiaowei, Matias R. Fagiani, Sandy Gewinner, Wieland Schöllkopf, Knut Roger Asmis, Florian A. Bischoff, Fabian Berger, and Joachim Sauer. "Gas phase structures and charge localization in small aluminum oxide anions: Infrared photodissociation spectroscopy and electronic structure calculations." AIP Publishing, 2016. https://ul.qucosa.de/id/qucosa%3A21256.
Full textNguyen, Cong Tung. "Etude des mécanismes d'oxydation des alliages FeCrAl à haute température (1100°C)." Clermont-Ferrand 2, 2009. http://www.theses.fr/2009CLF21941.
Full textLang, Christopher M. "Development of quaternary ammonium based electrolytes for rechargeable batteries and fuel cells." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-10262006-140639/.
Full textKohl, Paul, Committee Chair ; Bottomley, Lawrence, Committee Member ; Eckert, Charles, Committee Member ; Fuller, Tom, Committee Member ; Teja, Amyn, Committee Member.
BENAISSA, MOHAMMED. "Etude par spectroscopie infrarouge des proprietes superficielles de l'alumine et des alumines sodees ou fluorees : acidite et basicite." Caen, 1985. http://www.theses.fr/1985CAEN2013.
Full textTaylor, Kelly J. "Band evolution and shell structure in large clusters: Aluminum(3-60)anion, copper(1-1113)anion, silver(1-58)anion, and gold(1-223)anion." Thesis, 1990. http://hdl.handle.net/1911/16397.
Full text"First principle studies on oxidation of Al₁₃ anion cluster and hydrogen desorption from hydrogenated Si(100) surface." Thesis, 2010. http://library.cuhk.edu.hk/record=b6074840.
Full textMetal atom clusters are nanoscale intermediates between metal atoms and the bulk metal. Al13- can be regarded as a cluster model for Al(111) due to its special electronic and geometric structures. The reaction between Al13- and O2 was explored by various DFT methods such as BLYP, PW91, PBE, B3LYP and BHHLYP and post-HF methods such as CCSD and QCISD(T). The calculation results demonstrated that the reaction was exothermic and thermodynamically quite favorable, and the reason for the stability of Al13- towards oxygen exposure was kinetic, due to the presence of a reaction barrier. True to the expectation of Al13- as a molecular model for the Al surface, the identification of this barrier resolved a long standing puzzle in the initial chemisorption of O2 on Al(111): a barrier was identified in experiment but not in any theoretical calculations on the ground state potential surface.
Reactions on solid surfaces play a crucial role in many technologically important areas such as corrosion, adhesion, synthesis of new materials and heterogeneous catalysis. Theoretical studies on chemical reactions at surfaces can provide much useful information to understand and control these chemical processes. The present project is devoted to explore chemical reactions occurred on the aluminum cluster of Al13- and on the Si(100) surface by first principle calculations, using Gaussian 03 and Vienna Ab Initio Simulation Package (VASP).
The Al13-+HX reactions, with HX being either HCl or HI, are explored by first principle calculations and two importance dynamic factors are identified. Firstly, there was a barrier to the dissociative adsorption of FIX on the surface of an Al13- cluster, which involved charge transfer from Al13-. Secondly, the H atom could be bonded to the cluster in multiple ways, similar to the top, bridge and hollow adsorption sites on Al(111) surface. With a large amount of energy (>40 kcal/mol) deposited during the formation of Al13 -HX-, the H atom could easily migrate among these sites, similar to the diffusion of H on metal surfaces. The two dynamic factors were therefore important considerations in the formation and dissociation of Al 13-HX- And moreover, these dynamic factors make Al13- a fascinating model to probe the dynamic aspect of surface reactions, which should be an important consideration in the reactivity of other metal clusters.
Yuan, Qinghong.
"October 2009."
Source: Dissertation Abstracts International, Volume: 72-01, Section: B, page: .
Thesis (Ph.D.)--Chinese University of Hong Kong, 2010.
Includes bibliographical references.
Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.
Electronic reproduction. Ann Arbor, MI : ProQuest Information and Learning Company, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web.
Abstract also in Chinese.
Wu, Chiawen, and 吳嘉文. "The influence of citrate anion on the Al13 and the speciation of aluminum." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/97777378464434147365.
Full text國立臺灣大學
農業化學研究所
88
The polynuclear species of aluminum (including Al13) in Al partially hydrolytic soltuion influence the soil genesis, plant toxicity, and waste water process of the natural environment. The orgainic ligands in soil can be complexed with aluminum to inhibit the toxicity of aluminum. Many scholars are interested in the mechanisms of the organic ligands complexd with aluminum and their roles influence the Al partially hydrolytic solution. The objective of this study is focusing on the influences of aluminum hydrolytic reaction with and without citrate anion, and to assess the qualitative and quantitative relation to aluminum species by combining ferron method, 27Al NMR, MinteqA2 chemical species speciation program, XRD, AFM techniques etc. The speciation of aluminum in Al partially solution without citrate anions at pH = 4, monomeric Al species hydrolyze to Al13 complexes. The NMR chemical shift of Al13 is at 62.5 ppm, and the XRD d-spacings of Al13 with sulfate precipitates are 12.06 Å and 9.82 Å. As the hydroxy anions are added, the Al13 complexes transfer slowly to colloidal phase or precipitated of Al complexes. The size of the sulfuric precipitates of colloid or precipitated Al complexes is around 0.5 μm. Some Al-hydroxy-sulfate complexes aggregate together. When citrate anions exist, citrate anions will be complexed with aluminum and form Al-citrate and Al-citrate2 complexes. Their NMR chemical shift is near 6 ppm. As the hydroxy anions are added, citrate anions are partiallyly replaced and form hydroxy-citrate-colloid or precipitated of Al complexes. The shape of the sulfuric precipitates of hydroxy- citrate-colloid or precipitated of Al complexes is rhomboid or triangle. The partcile size is 1μm and its XRD d-spacings are 4.64 Å, 4.43 Å, 4.24 Å, 4.10 Å, and 3.89 Å, respectively。
DeGroff, Puhek Cynthia Lucil. "Synthesis and characterization of new chromium and aluminum metalloporphyrins in route to water-soluble buckminsterfullerene radical anion salts." Thesis, 1996. http://hdl.handle.net/1911/14047.
Full textFroese, Michael [Verfasser]. "A cryogenic electrostatic ion trap and first experiments on delayed emission of aluminum anion clusters and self-bunching / Michael Froese." 2010. http://d-nb.info/1000324699/34.
Full textLI, TIEN-SHENG, and 李天生. "Investigation of Intercalation or Adsorption of AlCl4- Anions in the Different Graphite Materials for Aluminum-ion Battery." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/thz22y.
Full text東海大學
化學系
107
In recent years, aluminum has been considered as suitable candidate for electrochemical storage devices due to its high volumetric and gravimetric capacities besides its high abudance. The high capacity of aluminum ion battery is attributed to trivalent electrochemical redox reaction (Al3++3e-↔Al). Moreover, it is supported by its density which is around four times the lithium and it can be handled under the air leading to enormous advantages for the battery application, thus extremely improves the safety level of electrochemical storage system. We investigated the electrochemical performance of different graphite materials as cathode for aluminum-ion battery by using in-situ X-ray diffraction and in-situ Raman techniques. The two analytical methods demonstrated that crystallinity of the graphite materials will influence the storage mechanism of AlCl4-. Furthermore, we synthesized expanded graphite (EG) by simple acid treatment and followed by high temperature annealing.The high capacity displayed by EG can be attributed to integreated intercalation and adsorption mechanisms. In-situ XRD and in-situ Raman techaniques were used to speculate the different mechanisms adopted by EG during cycling.