Characterization of nano-crystalline MgeNieAl hydrotalcite derived mixed oxides as hydrogen adsorbent

A promising energy storage material containing magnesium, nickel and aluminum metals has been
synthesized using conventional coprecipitation method. The physio-chemical properties, morphology
and microstructure of hydrotalcite based mixed oxides (MNAM) have been characterized using ICP-MS,
XRD, BET, FESEM and TEM techniques. The characterizations revealed that the adsorbent are highly
dispersed, poly crystalline, homogenously distributed and interactive. Temperature programmed techniques
have been used to explore the sorption capacities of mixed oxides. Nano-crystalline mesoporous
and interactive reduced mixed oxides exhibit a 3.9 wt% H2 adsorption capacity at ambient conditions.
Temperature programmed desorption study predicted a desorption capacity of 1.9 wt% H2. Different
hydrogen adsorbed phases of magnesium and nickel have been characterized using HRTEM, Raman and
FT-IR techniques.