Synthesis of Ni/Graphene Nanocomposite for Hydrogen Storage

Abstract

We have designed a Ni-graphene composite for hydrogen storage with Ni nanoparticles of 10 nm in size, uniformly dispersed over a graphene substrate. This system exhibits attractive features like high gravimetric density, ambient conditions, and low activation temperature for hydrogen release. When charged at room temperature and an atmospheric hydrogen pressure of 1 bar, it could yield a hydrogen capacity of 0.14 wt %. When hydrogen pressure increased to 60 bar, the sorbent had a hydrogen gravimetric density of 1.18 wt %. The hydrogen release could occur at an operating temperature below 150 °C and completes at 250 °C.

Catalytic Ammonia Decomposition over High-Performance Ru/Graphene Nanocomposites for Efficient COx-Free Hydrogen Production

“…Furthermore, both the Ru particle size and morphology were significantly affected by the presence of water as a co-solvent in the precursor solution, and the CS system showed Ru nanoparticles that were much smaller and more uniform, resulting in an excellent Ru dispersion on the graphene nanosheets. Compared with the other recently reported metal particle/graphene composites, the Ru/graphene composites prepared in the present work also showed much smaller and more uniform metallic particles [7,8], indicating the formation of high-quality Ru/graphene composites. Due to the structure-sensitive feature of ammonia decomposition on Ru [31,32], the Ru/graphene prepared from the CS system simultaneously allowed good control of the Ru particle size and shape on graphene nanosheets even at extremely high levels of Ru loading (>50 wt %), which was favorable for highly enhanced catalytic activity for ammonia decomposition.…”

“…In physical storage routes, hydrogen compressed under high pressure or stored in a liquid state can achieve attractive volumetric density, but these technologies suffer from extremely harsh processing conditions at a very high cost with severe safety concerns. On the other hand, although hydrogen can be stored in porous materials via adsorption under mild conditions [5][6][7][8][9], the relatively low hydrogen storage capacity of various sorbents seems to be an insurmountable obstacle for practical applications. A great deal of attention has been paid to the chemical storage of hydrogen, and various types of hydrogen storage systems have been intensively studied based on different hydrogen carriers such as metal and organic hydrides [10][11][12][13][14].…”

Preparation and Catalytic Activity of a Novel Nanocrystalline ZrO2@C Composite for Hydrogen Storage in NaAlH4

“…The development of safe, convenient, and highly efficient solid‐state hydrogen storage technologies for onboard applications is critical to promote the practical applications of hydrogen energy . Recently, complex light metal hydrides have received extensive attention due to their high gravimetric hydrogen capacities .…”

Facile Mechanochemical Synthesis of Nickel/Graphene Oxide Nanocomposites with Unique and Tunable Morphology: Applications in Heterogeneous Catalysis and Supercapacitors

“…Zhao and co-workers [17] utilized magnetic Ni@graphene nanocomposites for efficient removal organic dye under ultrasound. Very recently, Zhou et al, [18] obtained Ni/graphene nanocomposite for hydrogen storage applications. As result, several preparation methods have been developed to achieve Ni/graphene nanocomposites with unique physicochemical properties in a reproducible and controlled manner [19,20].…”