hydrogen storage tagged posts

This image shows a new efficient and low-cost method for hydrogenation of graphene with visible light. Credit: Joakim Bergman, AstraZeneca

“The reaction is convenient and cheap, and hydrogenated graphene may be applied within areas such as hydrogen storage. Additionally, upon functionalization of graphene one can open a bandgap and this fact is of high relevance for electronics applications,” says Prof. Henrik Ottosson.

Graphene reacts with formic acid in a water solution upon irradiation with visible light. In the reaction, formic acid acts as masked hydrogen and a material is produced where hydrogen extensively has been added to graphene. One says that graphene has been hydrogenated. Yet, graphene research is a side-project in Henrik Ottosson’s group...

Over time, the zinc ions in MOF-5 (pink solutions) get replaced with cobalt ions, (blue solutions) demonstrating the dynamics of metal organic frameworks. Credit: American Chemical Society.

MOF’s have many potential apps: antimicrobial agents, H-storage materials and solar-cell components.

Despite their rigid-sounding name, MOF structures are also dynamic – much more so than previously thought. This discovery could lead to the synthesis of brand-new types of materials. As the name implies, MOFs are composed of networks of organic (carbon-based) compounds interspersed with metal ions. Many different combinations of metals and organic components exist, but much of what we know about these systems comes from a zinc and benzene di-acid framework called MOF5...