New publication in Ultrasonics Sonochemistry journal entitled “Ultrasound-assisted exfoliation of a layered 2D coordination polymer with HER electrocatalytic activity” in collaboration between Nanosfun and the groups of Prof. Renhao Dong (Molecular Functional Materials – Technische Universität Dresden, Germany) and Dr. Janet Soleimannejad (University of Tehran).
In this work, a 2D layered crystal has been synthesized and exfoliated through ultrasounds methodology for the obtention of nanosheets. Interestingly, the resulting nanosheets showed enhanced catalytic activity compared with reported structures.
ABSTRACT: Large blue rectangular crystals of the 2D layered coordination polymer 1 have been obtained. The interest for this complex is two-fold. First, complex 1 is made of 2D layers packing along the (0-11) direction favored by the presence of lattice and coordinated water molecules. And second, nanostructures that could be derived by delamination are potentially suitable for catalytic purposes. Therefore it represents an excellent example to study the role of interlayer solvent molecules on the ultrasound-assisted delamination of functionally-active 2D metal-organic frameworks in water, a field of growing interest. With this aim, ultrasound-assisted delamination of the crystals was optimized with time, leading to stable nanosheet colloidal water suspensions with very homogeneous dimensions. Alternative bottom-up synthesis of related nanocrystals under ultrasound sonication yielded similar shaped crystals with much higher size dispersions. Finally, experimental results evidence that the nanostructures have higher catalytic activities in comparison to their bulk counterparts, due to larger metallic center exposition. These outcomes confirm that the combination of liquid-phase exfoliation and a suitable synthetic design of 2D coordination polymers represents a very fruitful approach for the synthesis of functional nanosheets with an enhancement of catalytic active sites, and in general, with boosted functional properties.