Co metal nanoparticle incorporated graphene nanohybrids were successfully synthesized via a simple decomposition reaction of the metal precursor, dicobalt octacarbonyl (Co₂(CO)₈), in the presence of the mesoporous graphene (MG) for enhanced hydrogen storage performance. As a host material, MG, which has a three-dimensional interconnected pore structure (S_BET of 860 m² g^-1, pore size of 6.3 nm), can provide a facile diffusion pathway to electroactive species, along with an appropriate pore size for immobilizing Co metal nanoparticles. According to the XRD and TEM analyses, after hybridization, the cubic phased Co metal nanoparticles were homogeneously dispersed and stabilized on the surface of the host MG with sizes of 5.3 nm. According to the measurement of the electrochemical hydrogen storage, the discharge capacity of the obtained sample exhibited 250 mAh g^-1 with good cyclic stability, caused by the synergetic effect of the MG and Co metal nanoparticles.

在介孔石墨烯（MG）的存在下，通过金属前驱体八羰基二钴二钴（Co ₂（CO）₈）的简单分解反应，成功地合成了掺有钴金属纳米颗粒的石墨烯纳米杂化物，从而提高了储氢性能。MG为基质材料，它具有三维互连的孔结构（S _BET为860 m ² g ^-1，孔径为6.3 nm），可以为电活性物质提供便捷的扩散途径，并提供合适的孔径以固定Co金属纳米颗粒。根据XRD和TEM分析，在杂交之后，立方相的Co金属纳米颗粒均匀地分散并稳定在尺寸为5.3nm的主体MG的表面上。根据电化学储氢的测量，由于MG和Co金属纳米颗粒的协同作用，所获得的样品的放电容量表现出250mAh g ^-1且具有良好的循环稳定性。