The storage of hydrogen in an accessible form for use in fuel elements is a global problem. Current research in this field is aimed at synthesis of materials that would meet the criteria proposed by National Department of Energy of USA. These criteria take into account a wide range of parameters: the temperature and pressure, at which the material can be used, the amount of hydrogen that can be stored, the number of cycles and speed of loading/ unloading the hydrogen, toxicity and safety of the material etc. The methods for storage of hydrogen are diverse: compressed, liquid, chemical, adsorption storage, but none, at this moment, does not meet all the applicability requirements [1]. Physical adsorption method has some obvious advantages: fully reversible process, fast cycle life and refilling time. At the same time, the introduction into practice of this method is limited by the necessity of maintaining the low temperature and high pressure. The active carbons are a broad class of adsorbents that are widely studied in the process of hydrogen storage [2]. The attractiveness of activated charcoal is explained by large surface area and volume of micropores, posibility of controlling their structure and low production price. The goals of this study were to obtain microporous activated carbons by microwave treatment and to investigate their hydrogen adsorption properties. A series of activated carbons were prepared by impregnating the nut shells with KOH in ratio of 1:1 to 1:4 by weight and subsequent microwave activation. The microwave activation was performed at 700W for 5 minutes. The active carbons were studied by gas adsorbtion method at 77K, by using nitrogen and hydrogen as adsorbates. All the active carbons are mostly microporous with a large adsorption surface. Mass of adsorbed at 77K hydrogen well correlates with surface area and volume of micropores. The activated carbon obtained by impregnation with KOH in 1:4 ratio by weight possesses the best adsorption features with a maximum capacity of retaining hydrogen of 3.82wt.% and 0.05 wt.% at 77K and 296K, respectively. The energy of hydrogen adsorption in this sample constitutes 6.75 kJ/mol (77K) and 2.21 kJ/mol (296K). Subsequent investigations are aimed at modification of the activated carbon’s surface to increase the adsorption energy, which is expected to lead to an increase of adsorption at room temperature. The research leading to these results has received funding from the People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme FP7/2007-2013/ under REA grant agreement no. PIRSES-GA-2013-612484.