Hydrogen Storage Characterization Of Hydrotalcite-Derived Reduced Mixed Oxides

Hydrotalcites compound have received much attention and view of their potential applications as adsorbents, as anion exchangers, in nucleophilic halide exchanger and most importantly as catalyst support. The synthesis and characterization of hydrotalcite-like compound (HTLcs) for hydrogen storage purposes is described. The HTLcs is synthesized by using Magnesium Nitrate Hexahydrate and Aluminium Nitrate Nanohydrate as the starting material by coprecipitation with sodium carbonate. The characterization analysis on the HTLcs synthesized is carried out by using Powder X-ray Diffraction (XRD), and Fourier Transform Infrared Spectroscopy. This study also focuses on the effect of thermal treatment on HTLcs during calcinations process which formed a mixed oxides compound. After that, the adsorption/desorption behavior study of H2 on HTLcs is conducted by using Temperature programmed reduction (TPR )/Temperature Programmed Desorption (TPD).According to the FTIR analysis before and after adsorption, it was found that there is a significant amount of H2 adsorbed after the mixed oxides reduced under hydrogen flow for a period of time. This outcome also supported by the H2 consumption curve obtained in TPR analysis where it has shown that H2 adsorption occur on metal formed after an amount of reducible mixed oxides completely reduced. Furthermore, during TPD analysis, it was found that small amount of H2 desorbed with low rate of adsorption.