On the Preparation of Mg2Ni by Combining Electrodeoxidation and Electrolysis Techniques

Date

2014-11-01

Author

ERDEN, Fuat
Karakaya, İshak
Erdogan, Metehan

Metadata

Show full item record

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

Item Usage Stats

158
views

0
downloads

Mg2Ni is a well-known hydrogen storage alloy. Most of the preparative methods for this alloy require high temperature processing of pure magnesium and nickel. The proposed method, studied in this work, involves the production of Mg2Ni alloy directly from NiO and MgCl2 in an electrochemical cell. This method can eliminate the difficulties that may arise, during handling due to the reactive nature of metallic components, especially Mg. XRD patterns of reduced samples indicated the partial formation of Mg2Ni. Experimental results also showed that sintering of NiO, which resulted in the decrease of porosities, adversely affects the formation of Mg-Ni intermetallic compounds. Such an observation was thought to be the result of higher molar volume of Mg2Ni as compared to that of NiO.

Subject Keywords

Hydrogen Storage Material, Mg2Ni, Molten Salt Electrolysis, Electrodeoxidation

URI

https://hdl.handle.net/11511/55566

Journal

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE

Collections

Department of Metallurgical and Materials Engineering, Article

Suggestions

OpenMETU
Core

AN INTERRUPTED IN-SITU METHOD FOR ELECTROCHEMICAL FORMATION OF Mg-Ni INTERMETALLICS Erden, Fuat; Karakaya, İshak; ERDOĞAN, METEHAN (2014-02-20) Mg-Ni system draws attention due to the promising hydrogen storage properties of Mg2Ni. The proposed method involves the use of NiO and MgCl2 in an electrochemical cell to from Mg-Ni intermetallics directly. The electrodeoxidation of NiO was followed by combination of Mg and Ni in molten salt electrolytes. The products were characterized by XRD analysis and SEM examinations. The quantitative results from Rigaku supported by Rietveld Refinement method conducted by Maud showed that more than 50 percent of the...
Optimization of conditions of metallothermic reduction of rare earth preconcenrtrates Yılmaz, Serkan; Topkaya, Yavuz Ali; Department of Metallurgical and Materials Engineering (2007) Rare earth ferrosilicon alloy is an important additive for ferrous metallurgy. It is mainly used to control the detrimental effects of sulfur in steel and to modify graphite structures in cast iron. The aim of this study was to optimize the conditions for the production of rare earth ferrosilicon alloy by metallothermic reduction process using a preconcentrate prepared from a bastnasite type of ore present in the Beylikahır-Eskişehir region of Turkey. In this study, the rare earth preconcentrate was reduced...
Combinatorial search for hydrogen storage alloys: Mg-Ni and Mg-Ni-Ti Olmez, Rabia; Cakmak, Gulhan; Öztürk, Tayfur (2010-11-01) 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, comp...
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...
Synthesis of Poly(silyne-co-hydridocarbyne) for Silicon Carbide Production NUR, YUSUF; Toppare, Levent Kamil (2013-01-01) Pre-ceramic polymers have previously been shown to be polymeric precursors to silicon carbide, diamond and diamond-like carbon. Here, we report the synthesis of a pre-ceramic polymer, poly(silyne-co-hydridocarbyne), which was electrochemically synthesized from one monomer containing both silicon and carbon in its structure. The polymer is soluble in common solvents such as CHCl3, CH2Cl2 and THF. Since the polymer contains both silyne and carbyne on its backbone, it can be easily converted to silicon carbide...

Citation Formats

F. ERDEN, İ. Karakaya, and M. Erdogan, “On the Preparation of Mg2Ni by Combining Electrodeoxidation and Electrolysis Techniques,” INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE, pp. 6627–6639, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55566.