Nowadays, environmental sustainability is of the utmost importance, therefore, it is crucial to use renewable sources of energy rather than fossil fuels. Hydrogen holds great promise as a zero-emission fuel, due to the highest energy density per unit mass. Along with the production, one of the major drawbacks, however, is a lack of effective hydrogen storage solutions at standard pressure and temperature as pressurized and liquid hydrogen are not considered as economically viable options for storage. Furthermore, reservoirs are, in these cases, under high pressure, which is also extremely dangerous. The aim of this work was to determine the most favourable synthetic pathway for porous metal-organic framework zinc 2 methylimidazolate (ZIF-8), which is a promising material for hydrogen storage. The synthesis of a zinc 2-methylimidazolate in an aqueous solution, with deep eutectic method, the synthesis in an aqueous solution in the presence of TEA and preparation in methanol were implemented. 2-methylimidazole and zinc nitrate hexahydrate or zinc acetate dihydrate were used as the reactants. X-ray powder diffraction and FTIR spectroscopy were also carried out in order to characterize all products. Both analysis confirmed that products of different synthetic pathways were the compound ZIF 8. Products did not differ significantly in their structure, which indicates water solutions can be used as an alternative to organic solvents.
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