Abstract
Hydrogen is envisaged to become an alternative clean energy source to fossil fuels that eventually lead to gradually increasing demand to design an efficient adsorbent for high storage capacity. Being inspired from the metal-doped adsorbents, mesoporous KIT-6 was functionalized with different metals namely Ce, Co, Cr, Cu, Ni, Pd, Pt, Sn and Ti with constant loading by wet impregnation method. Hydrogen adsorption performance showed that the metal doping improves the hydrogen storage capacity of KIT-6 except for KCu. Adsorbents KPd and KPt showed small hysteresis during adsorption/desorption analysis. Among all the metals, Pd-doped KIT-6 (KPd) showed the maximum uptake capacity (0.31 wt%) at atmospheric conditions. However, Sn-doped KIT-6 (KSn) showed the maximum uptake of 4.74 wt% at 77 K and 40 bar. This study provides a thorough insight in to the hydrogen adsorption/desorption behavior of the various metal–doped KIT-6 studied, which could be important first-hand information before designing the hydrogen storage material for the practical application.
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