Analyzing the Electrochemically Catalytic Activity of Edge-Isolated MoS2 Monolayer

Wednesday, 4 October 2017: 15:20
National Harbor 8 (Gaylord National Resort and Convention Center)


Two dimensional (2D) MoS2 has been extensively studied as an efficient low-cost electrocatalyst for hydrogen evolution reaction (HER) and CO2 reduction reaction. Although the edges of MoS2 are known as the most active sites, the terraces sites can also be active due to the existence of defects. Designing edge-isolated and terrace-isolated platforms for MoS2 are essential to separately investigate their activities, which has not been done before. In our current project, those platforms have been achieved on MoS2 monolayer by using photolithography or E-beam lithography method. The HER activity of the edge was demonstrated to be 4 order magnitude higher than the terraces. Their activity benchmarks can be established. By those platforms, doping effects and heterostructure with other 2D materials can be also studied, in order to optimize the activities of the edge and terrace sites on MoS2.