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Showing 1 to 20 of 98 for “"NiO"”.
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Nanotermites multicamadas de Al/NiO sintetizadas por Magnetron Sputtering
… synthesized by magnetron sputtering of Al / NiO with different stoichiometries. Some compositions have shown released amount of heat of about 1.7 kJ /g, which is somewhat below the maximum achieved by similar compositions, which is around 2.44 kJ /g (YAN et al., 2015). The heat released by …
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Growth and Characterization of (InxGa1-x)2O3, and NiO Heterostructures
… GaN counterparts. Pulsed laser deposited (PLD) NiO/ β-(InxGa1-x)2O3 heterostructure was investigated for p-n diode applications. Monoclinic structure of (InxGa1-x)2O3 grown on sapphire substrate at temperatures of 700ºC and oxygen partial pressure of 10-2 Torr was found for indium composition …
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Fabrication SiO2 -NiO foam via replication technique for steam methane reforming catalyst at low temperatures
… study is to fabricate Silica-Nickel Oxide (SiO2-NiO) foams in the range 70 μm to 150μm open pore size, 75% to 90% of porosity, good physical and mechanical properties as a criteria catalyst in the Steam Methane Reforming (SMR) application. In this work, the porous foam fabricated with different …
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Production of single cell anode-supported SOFC using NiO/YSZ-YSZ-LSM/YSZ powder materials
… (BM) process. The materials for single cell are NiO/YSZ, YSZ, LSM/YSZ as anode, electrolyte and cathode, respectively. The cornstarch is used to create anode porosity while the material binder of the powder is polyvinyl alcohol (PVA) to increase green compact strength. The consolidation of anode …
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Role of Nanosize Effects on the Adsorptive and Catalytic Properties of NiO Nanoparticles towards Heavy Hydrocarbons
The effect of NiO nanoparticle size was studied to understand its impact on adsorption and catalytic activity during oil recovery and upgrading. A series of different-sized NiO nanoparticles between 5 and 80 nm were prepared. XRD, BET, FTIR, HRTEM and TGA were used to characterize the nanosize …
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Microstructural evolution of NiO grown on the pure Ni and Cr doped substrates at high temperature environment
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1991.
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Ultrasonic and electroplating approach for washcoat of γ-alumina and nickel oxide (nio) catalyst on fecral substrate for catalytic converter
… material and γ-Al2O3 as washcoat material and NiO catalyst. This study propose ultrasonic and electroplating approach as coating technique which not fully explored. Several problems in developing CATCO such as washcoat layer is spalling since the loose adhesion and unstable oxide growth in long …
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Preparation of high purity doped oxides for fundamental studies
… used to synthesize 0.01, 0.1, 0.5, and 1.0 mol % NiO, Co3O4, and Fe2O3-doped YSZ from all acetate precursors. The synthesized materials were calcined at temperatures between 600 degrees C and 1000 degrees C to produce powders that were then pressed into compacts and sintered at 1500 degrees C. The …
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Ab initio Untersuchungen zum Adsortpions- und Photodesorptionsmechanismus von CO und NO auf einer Nickeloxidoberfläche
… von CO und NO Molekülen auf einer NiO(100)-Oberfläche präsentiert. Systematische Studien wurden durchgeführt, um detaillierte Einblicke bezüglich der Bindungsmechanismen zu gewinnen. Weiterhin wurde der Anregungsmechanismus im CO-NiO(100) System aufgeklärt und die elektronisch …
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Effect of composition and sintering temperature on silica-nickel oxide foams by slurry method
… study is to fabricate silica-nickel oxide (SiO2-NiO) foams with 20 μm to 800 μm open pore size, 50% to 80% of porosity, good physical and mechanical properties. In this research, silica (SiO2) powder and nickel oxide (NiO) powder with different compositions of 2 wt.%, 4 wt.%, 6 wt.%, 8 wt.% and …
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Novel Ni-based Nanostructures: Synthesis and Application in Sensing and Energy Storage
… nickel hydroxide [Ni(OH)2] and nickel oxide (NiO) nanostructures have recently attracted increasing attentions due to their excellent performances in many applications, such as electrochromic smart windows, electrochemical (bio)sensing, gas sensing, energy storage and water splitting. Ni(OH)2 …
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Applications of electron energy loss spectroscopies to the study of surface chemistry
… used to study the bonding of (1) oxygen atom in NiO film grown on Ni(100) and Ni(110) surface and (2) nitrogen atom overlayer on Cu(100) and Cu(110) surfaces. EXELFS spectra obtained from the K-level of oxygen in NiO film grown on both the Ni(100) and Ni(110) surfaces reveal that the NiO films …
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Untersuchung der Deposit-Substrat-Wechselwirkungen und des Oxidationsverhaltens von Nanopartikeln auf einem oxidischen Träger am Beispiel der Systeme Ni/Al 10 O 13/NiAl(110) und Ge/Al 10 O 13/NiAl(110)
… der Partikeloberfläche unter Bildung von NiO. Weiterer Sauerstoff kann in diffusionskontrollierten Konkurrenzreaktionen sowohl das Deposit als auch selektiv Al des NiAl(110) oxidieren. Die thermische Stabilität des NiO variiert mit dem Oxidationsgrad; nach Zersetzung der NiO-Partikel …
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A density functional theory study into the mechanism and reactivity in heterogeneous system
… performances on three different types of NiO surface. The methane combustion process is investigated as a probe on these surfaces. In this part, activation of methane is studied under different coordination environment of Ni2+, such as sheet NiO, cubic NiO and octahedral NiO represented by …
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Fabrication of Three-Dimensionally Ordered Nanostructured Materials Through Colloidal Crystal Templating
… conversion of metal meshes and polymer meshes. NiO meshes are formed by oxidizing Ni meshes in the air. The NiO meshes exhibit higher volume occupation fraction than Ni meshes and the nanocrystalline sizes of NiO particles can be adjusted by the oxidation temperature. Due to the mechanical …
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Investigations of Ni-SDC carbonate (Ni-SDCC) as composite anode for low temperature solid oxide fuel cells
Systematic research regarding NiO-SDC carbonate (NiO-SDCC) as composite anode is limited despite great chemical compatibility and cell performance achieved with other low temperature solid oxide fuel cell (LTSOFC) components. This study focuses to investigate the correlation of powder composition …
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Spintronics Physics of Thin-film Interfaces
… the interfaces of EuO(001)/LaAlO$_3$(001), EuO/NiO(111) and graphene/metal heterostructures. Published DFT calculations postulated the formation of a spin polarised two-dimensional electron gas (2DEG) in the EuO film at $\sim$1.5 nm away from the EuO(001)/LaAlO$_3$(001) interface, due to the …
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Metal oxide heterostructured films with controlled architecture for enhanced photocatalytic properties
… of semiconductor/semiconductor (p-n type, NiO/ZnO) and metal/semiconductor (metal/n- type, RuO2/ZnO) heterostructures using systematic (step-by-step) interface studies, in order to gain knowledge regarding the influence of ZnO surface cleaning in the interfacial band bending, thereby …
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Μελέτη λεπτών μεταλλικών υμενίων σε μονοκρυσταλλικό οξείδιο του νικελίου με επιφανειακά ευαίσθητες τεχνικές και προσομοιώσεις μοριακής δυναμικής
… χρωμίου σε μονοκρυσταλλικό οξείδιο του νικελίου, NiO(100). Οι αποθέσεις έγιναν κοντά στη θερμοκρασία δωματίου σε περιβάλλον υπερυψηλού κενού 2 x 10-10 mbar χρησιμοποιώντας πηγές θερμικής εξάχνωσης, ενώ η χημική κατάσταση των επιφανειών προσδιορίστηκε με την χρήση φασματοσκοπίας φωτοηλεκτρονίων …
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Junction Based Gallium Nitride Power Devices
… of this dissertation characterizes nickel oxide (NiO) as a p-type material to construct the junction-based GaN power devices. Although the homogenous p-GaN/n-GaN junction is preferred in many devices, the selective-area, p-GaN regrowth can lead to excessive leakage current; in comparison, the …
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