Nanocrystalline hydrotalcite derived mixed oxides containing magnesium, cobalt, and aluminum (MCAM) (M(1-??)Al??O(1+??/2);\r\nM=MgorCo/Mg andCo and x =molar ratios) have been synthesized successfully and showed reversible hydrogen storage capacity\r\nat near ambient condition using fixed bed. ICP-MS and XRD analysis confirmed the adsorbent phases and their homogeneity.\r\nAdsorbent morphology and textural properties have been characterized using FESEM, BET and TEM analysis techniques. Nanocrystalline\r\nand porous mixed oxides exhibited 3 wt% H2 storage capacity and desorbed 57% of adsorbed H2. Spillover phenomena\r\nare observed through FTIR analysis. Adsorption enthalpy (???) and entropy (???) change were -25.58 kJ/mol and -59.98 J/mol�·K,\r\nrespectively, which implied a prospective feature of reversible hydrogen adsorption on nano-crystalline mixed oxide.
Loading....