Magnezyum esaslı çok katmanlı ince filmlerde hidrojen depolama

Hydrogen storage in magnesium based thin films Akyıldız, Hasan; Öztürk, Tayfur; Özenbaş, Ahmet Macit; Department of Metallurgical and Materials Engineering (2010) A study was carried out for the production of Mg-based thin films which can absorb and desorb hydrogen near ambient conditions, with fast kinetics. For this purpose, two deposition units were constructed; one high vacuum (HV) and the other ultra high vacuum (UHV) deposition system. The HV system was based on a pyrex bell jar and had two independent evaporation sources. The unit was used to deposit films of Mg, Mg capped with Pd and Au-Pd as well as Mg-Cu both in co-deposited and multilayered form within a t...
Ab initio modelling and investigation of the effects of magnesium oxide surface modifications on single atom catalysis systems Kallem, Aydoğa; Toffoli, Hande; Canbay, Cahit; Department of Micro and Nanotechnology (2023-1-23) An emerging technology, namely Single Atom Catalysts (SACs) have the potential to bridge the positive characteristics of both heterogenous and homogenous catalysts. In order to create more efficient SACs, it is necessary to understand the metal support interaction (MSI) at the molecular level, which seriously affects the performance of SACs. In this study, the effects of surface modifications on the catalytic performance of SACs were examined via Density Functional Theory (DFT) to gain a deeper understandin...
Hydrogen decrepitation of magnesium-rich intermetallics Aydınlı, Alptekin; Öztürk, Tayfur; Özkan, Hüsnü; Department of Micro and Nanotechnology (2013) The production of metal hydride canisters may involve mechanical milling of the alloy powders under protective atmosphere and filling them into the canister in a glove-box environment. Such processes are often quite costly, and it is desirable to find a process which does not necessitate the use of protective atmosphere. Hydrogen decrepitation is one such process which involves in-situ pulverization of hydrogen storage alloys. The process starts with coarse alloy powders filled into a canister in open atmos...
Structural and mechanical investigations of magnesium and fluoride doped nano calcium phosphates Sun, Zehra Pınar; Evis, Zafer; Department of Micro and Nanotechnology (2009) The aim of this study was to investigate the microstructure and mechanical properties of pure and Mg2+ and F- doped nano-calcium phosphate (CaP) powders, which were synthesized by precipitation method. After the drying and calcination processes, the samples were sintered at 1100ºC for 1 hour. High densities were achieved except for the 7.5 % mole Mg doped samples. Microstructure of the CaPs were investigated by X- ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Mi...
Thickness effects in hydrogen sorption of magnesium/palladium thin films Gharavi, Ayshe Gharemeshg; Öztürk, Tayfur; Department of Metallurgical and Materials Engineering (2012) Magnesium (Mg) thin films with various thicknesses ranging from 50 to 1000 nm capped with nominally 20 nm Palladium (Pd) were prepared by a thermal evaporation unit. A total of 25 glass substrates were used in each experiment. The unit had a rotatable macro shutter, rectangular in shape, rotation axes opposite to the Mg source, which allowed controlled exposure of the substrates. Thin films of 50, 100, 150, 200, 300, 400, 500, 600, 800 nm and 1000 nm were produced in a single experiment. Hydrogenation and d...

Citation Formats

T. Öztürk, A. M. Özenbaş, and H. Akyıldız, “Magnezyum esaslı çok katmanlı ince filmlerde hidrojen depolama,” 2008. Accessed: 00, 2022. [Online]. Available: https://hdl.handle.net/11511/95775.