The problem of the long-term accumulation of the occasional surplus of electricity with the possibility of using them in the future - is still challenging and extremely complex. The idea of accumulating energy in the form of hydrogen, which is one of the most energy-reach elements, has been a longstanding endeavor. When the stage of the transformation of electricity into hydrogen has already been successfully solved by the electrolysis of water, the problem of accumulating hydrogen itself is still in the focus of the current research, looking for the safe, efficient and inexpensive hydrogen carriers. One of the promising directions in solving this problem is the use of liquid organic hydrogen carriers (LOHC), in other words organic compounds capable of attaching and cleaving hydrogen molecules. Using of the LOHC is based on the reversible reactions of hydrogenation and dehydrogenation of an unsaturated compound, which corresponds to the stage of energy storage (charging of the battery), and dehydrogenation, which corresponds to hydrogen recovery (or the battery discharge). Both reactions take place in the presence of catalysts. Thus, the activity and stability of hydrogenation-dehydrogenation catalysts in this case determine the efficiency of the entire system as a whole. Methods of thermal analysis are widely and successfully used in the field of studying physical and chemical properties and evaluating the activity of catalysts. In particular, the methods of simultaneous thermal analysis (DTA-TGA) have been widely used to study the stability of catalysts and determine their operating temperatures, as well as to determine coke, sulfur, nitrogen on spent catalysts. Methods of temperature programmable reduction of catalyst precursors (or active phase particles) are often used to estimate the relative catalytic activity in various reactions, including the hydrogenation-dehydrogenation reaction. Thermal analysis methods with temperature programming (desorption of NH3, pyridine, CO, CO2) are widely used to evaluate the acid properties of carriers and catalysts. To characterize the dispersity of the distribution of the active component on the surface of the carrier, the methods of adsorption of probe molecules are used, which can be CO, NO, etc. In this work, we present some results of the complex study of the physicochemical properties of catalysts based on the metal sulfides with metals of variable valence, performed using a wide range of thermal analysis methods. The interrelationships between the measured physicochemical characteristics and the activity of synthesized catalysts in the hydrogenationdehydrogenation reactions of LOHC will be discussed.