Combinatorial search for hydrogen storage alloys: Mg-Ni and Mg-Ni-Ti

Date

2010-11-01

Author

Olmez, Rabia
Cakmak, Gulhan
Öztürk, Tayfur

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

126
views

0
downloads

A combinatorial study was carried out for hydrogen storage alloys involving processes similar to those normally used in their fabrication. The study utilized a single sample of combined elemental (or compound) powders which were milled and consolidated into a bulk form and subsequently deformed to heavy strains. The mixture was then subjected to a post annealing treatment, which brings about solid state reactions between the powders, yielding equilibrium phases in the respective alloy system. A sample, comprising the equilibrium phases, was then pulverized and screened for hydrogen storage compositions. X-ray diffraction was used as a screening tool, the sample having been examined both in the as processed and the hydrogenated state. The method was successfully applied to Mg-Ni and Mg-Ni-Ti yielding the well known Mg2Ni as the storage composition. It is concluded that a partitioning of the alloy system into regions of similar solidus temperature would be required to encompass the full spectrum of equilibrium phases. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.

Subject Keywords

Combinatorial approach, Hydrogen storage, Equal channel angular pressing (ecap), Temperature programmed sorption, Mg2Ni, MgNi2

URI

https://hdl.handle.net/11511/31090

Journal

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

DOI

https://doi.org/10.1016/j.ijhydene.2010.08.045

Collections

Graduate School of Natural and Applied Sciences, Article

Suggestions

OpenMETU
Core

Combinatorial study of hydrogen storage alloys Ölmez, Rabia; Öztürk, Tayfur; Department of Metallurgical and Materials Engineering (2009) A combinatorial study was carried out for hydrogen storage alloys which involve processes similar to those normally used in their fabrication. The study utilized a single sample of combined elemental (or compound) powders which were milled and consolidated into a bulk form and subsequently deformed to heavy strains. Material library was obtained in a post annealing treatment carried out at elevated temperatures which brings about solid state reactions between the powders yielding equilibrium phases in the r...
Nb-Pd-Ti BCC thin films for hydrogen separation Piskin, Fatih; Öztürk, Tayfur (2019-02-15) An investigation was carried out into Nb-Pd-Ti ternary system to determine possible body-centered cubic (b.c.c.) membranes that can be used for hydrogen separation. A library of thin films was produced covering the greater portion of Nb-Pd-Ti ternary diagram using a combinatorial approach. The library was screened both structurally and in terms of a reactivity index defined as the ratio of the resistivity measured in the films under hydrogen and argon. The study showed that a substantial portion of composit...
Catalytic hydrolysis of hydrazine borane for chemical hydrogen storage: Highly efficient and fast hydrogen generation system at room temperature Karahan, Senem; Zahmakiran, Mehmet; Özkar, Saim (2011-04-01) There has been rapidly growing interest for materials suitable to store hydrogen in solid state for transportation of hydrogen that requires materials with high volumetric and gravimetric storage capacity. B-N compounds such as ammonia-triborane, ammonia-borane and amine-borane adducts are well suited for this purpose due to their light weight, high gravimetric hydrogen storage capacity and inclination for bearing protic (N-H) and hydridic (B-H) hydrogens. In addition to them, more recent study [261 has sho...
Combinatorial development of LSF-based cathode materials for intermediate temperature solid oxide fuel cells Kılıç, Fahrettin; Öztürk, Tayfur; Department of Metallurgical and Materials Engineering (2021-6) This thesis focuses on the synthesis, characterization, and processing of LSF based composite cathode for solid oxide fuel cells. The cathode comprises three oxides; LSM, LSF and ScSZ which are synthesized by co-sputtering using combinatorial approach. The electrolyte was Scandia doped Zirconia(ScSZ), as it has attractive ionic conductivity at lower temperatures. Having chosen the electrolyte ScSZ as electrolyte. After detailed analysis with regard to conductivity and thermal expansion for each oxide, the c...
Combinatorial development of nanocrystalline/amorphous (La,Sr)CoO3-(La,Sr)2CoO4 composite cathodes for IT-SOFCs Sari, Doğancan; Piskin, Fatih; Torunoglu, Ziya Cagri; Yasar, Bengisu; Kalay, Yunus Eren; Öztürk, Tayfur (2018-11-15) In this study, a combinatorial approach was used to develop cathode materials with improved performance at temperatures in the range 500-700 degrees C. A thin film composite cathode library was obtained by co-sputtering of LSC-113 and LSC-214 onto suitably positioned substrates each with controlled compositions. The cathode library was screened with an electrochemical impedance spectroscopy using symmetric cells. The study showed that the compositions with volume fractions in the range 0.40 < LSC-214 < 0.60...

Citation Formats

R. Olmez, G. Cakmak, and T. Öztürk, “Combinatorial search for hydrogen storage alloys: Mg-Ni and Mg-Ni-Ti,” INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, pp. 11957–11965, 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/31090.