▎ 摘　　要

The mechanism of hydrogen adsorption in mono- and multilayer oriented carbon nanotubes with graphene walls (OCNTGs) synthesized in the pores of TRUMEM membranes is studied. A comparative analysis of these results and data obtained earlier on hydrogen adsorption in cylindrical and planar graphene nanostructures (CPGNSes) formed on TsVM and TsVN zeolites is conducted. The OCNTGs and CPGNSes are synthesized at a temperature of 800 degrees C using methane as a pyrolyzed reagent and saturated with hydrogen at pressures of 9.0-12.0 MPa. Using thermogravimetric analysis (TGA) combined with mass spectrometry analysis, it is found that hydrogen is desorbed from the OCNTGs at a temperature of 175 degrees C and from the CPGNSes at 250 and 450 degrees C; this finding indicates the existence of two hydrogen adsorption mechanisms. Using Raman spectroscopy and transmission electron microscopy (TEM), it is shown that the OCNTGs are graphene structures. Studies of changes in the electrophysical characteristics (-potential and pore surface charge) of the original membranes, membranes with OCNTGs, and membranes with OCNTGs with accumulated hydrogen and studies of the morphology of the OCNTGs suggest that hydrogen adsorption occurs according to a dissociative mechanism. In addition, it is found that the ability of OCNTGs to adsorb hydrogen disappears when they cease to be a cylindrical structure closed along the circumference of a pore. It is concluded that hydrogen diffuses across the OCNTG surface and the earlier studied noncatalytic hydrogenation of decene-1 and naphthalene involving hydrogen occurs according to a spillover mechanism. A comparative analysis of the mechanisms of hydrogen adsorption in OCNTGs and CPGNSes is conducted, and the effect the physicochemical properties of the surface of substrates have on this process is determined.