121st General Meeting of the KCS

Type Oral Presentation
Area Oral Presentation of Young Material Chemists
Room No. Samda Hall A
Time THU 09:00-:
Code MAT.O-1
Subject Colloidal Mixtures of Transition Metal Chalcogenide and Oxide Nanosheets: Universal Precursors for Functional Nanohybrids
Authors Xiaoyan Jin, Seong-Ju Hwang*
Center for Hybrid Interfacial Chemical Structure (CICS), Department of Chemistry and Nanoscience, Ewha Womans University, Korea
Abstract The common 2D morphology and hydrophilic surface natures of exfoliated transition metal dichalcogenide (TMD) and transition metal oxide (TMO) nanosheets make possible the formation of homogenous colloidal mixture of these nanosheet materials. The obtained mixed colloids can be used as efficient precursor for intimately-coupled TMD-TMO nanohybrids with improved functionality. In one instance, highly efficient noble metal-free electrocatalysts for hydrogen evolution reaction (HER) are synthesized by the restacking of MoS2 and MnO2 nanosheets with cations. The hybridization with MnO2 nanosheet is quite effective in enhancing the HER electrocatalytic activity of MoS2 with significant improvement of stability, which is attributable to the provision of more reactive MoS2 edge sites and enhanced charge transfer upon the addition of MnO2 nanosheet. The present result clearly demonstrates that the colloidal mixture of TMD and TMO nanosheets can be used as effective precursor for exploring high performance TMD-based hybrid materials.
E-mail jinxiaoyan313@hotmail.com