On the Preparation of Mg₂Ni by Combining Electrodeoxidation and Electrolysis Techniques

摘要

Mg2Ni is a well-known hydrogen storage alloy. Most of the preparative methods for this alloy requirehigh temperature processing of pure magnesium and nickel. The proposed method, studied in thiswork, 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 ofmetallic components, especially Mg. XRD patterns of reduced samples indicated the partial formationof Mg2Ni. Experimental results also showed that sintering of NiO, which resulted in the decrease ofporosities, adversely affects the formation of Mg-Ni intermetallic compounds. Such an observationwas thought to be the result of higher molar volume of Mg2Ni as compared to that of NiO.