Abstract: The molybdenum disulfide composite material pillared by hydroxy-chromium oligocations ［Cr4(OH)6-(H2O)10］6+ with the basal interlayer space from 1.319 to 1.341 nm was prepared by intercalating the hydroxy oligocations into the interlayers of molybdenum disulfide using the single-molecular-layer technology. X-ray diffraction showed that the hydroxy-chromium oligocations can be used as a stable pillaring agent after aging at 70 ℃ for four days, and a pillared composite with high crystallinity can be obtained at a small Cr/Mo molar ratio and small Cr3+ concentration in the reaction system. Compared with the pristine 2H-MoS2, the pillared composite exhibited larger interlayer space, smaller crystallite size, larger specific surface area, and better thermal stability. The results of liquid-phase benzene catalytic hydrogenation showed that the catalytic activity of the pillared composite was evidently superior to that of the pristine 2H-MoS2 and the Raney Ni catalysts, and the composite with higher crystallinity displayed even better catalytic activity and repeatability.

Key words: hydroxy-chromium, molybdenum disulfide, single molecular layer, benzene, catalytic hydrogenation