Abstract
Prepared CoPS and NiPS3 are studied as new materials for hydrogen energy storage. Single phase of CoPS and NiPS3 were grown separately in evacuated silicatube via solid state reaction at 650°C with controlled heating rate 1°C/min. X-ray diffraction patterns confirm the formation of the desired compounds. Both CoPS and NiPS3 exhibited high thermal stability up to 700°C and 630°C, respectively. The morphology of the prepared samples was investigated using scanning electron microscopy and folded sheets appeared in the transmission electron microscopy. The samples were exposed to 20bar applied hydrogen pressure at 80K. Both compounds appear to have feasible hydrogen storage capacity. CoPS was capable to adsorb 1.7wt% while NiPS3 storage capacity reached 1.2wt%.
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