Hydrogen and Hydrogen Clusters Across Disciplines

X-ray chemical imaging and the electronic structure of a single nanoplatelet Ni/graphene composite

“…Although metal catalysts or metallic compounds are active materials and have strong interactions with hydrogen via chemical bonds, 13 the bare metal particles easily aggregate to form clusters 14 providing insufficient ''anchoring sites'', leading to a chemically inert system for gaseous hydrogen uptake. To overcome these drawbacks, doping metal particles, especially transition metal (TM) particles, on graphene should significantly strengthen the interaction among hydrogen, metal and graphene, 8,11,[14][15][16] i.e. TM particles, if uniformly dispersed on the surface of graphene, can serve as spacers of layered graphene structures and as hydrogen receptors; thus they further promote a dissociative chemisorption via the hydrogen spillover process.…”