Nanoscale hydrogen evolution reaction mapping at the two-dimensional semiconductor surface by SECCM

Heyun Du^1*, Zyang Lin¹, Ruoting Lin¹, Pinsyuan Huang¹

¹Chemical Engineering, Ming Chi University of Technology, New taipei city, Taiwan

* Presenter:Heyun Du, email:heyundu@mail.mcut.edu.tw

Layered MoS2 is considered as one of the most promising two-dimensional photocatalytic materials for hydrogen evolution reaction(HER). However, the ative site structure at the few layers transition metal dichalcogenides (TMDCs) are so far insufficiently resolved. This work combined several SPM observations to understand the surface and material science of energy catalyst, including atomic force microscopy (AFM), Kevin probe force microscopy (KPFM), scanning electrochemical microscopy (SECM) and scanning electrochemical cell microscopy (SECCM). Incombination with additional characterization methods, we deduce a band stucture of different heterojuction for HER mapping.

Keywords: Two-dimensional material, HER, SECCM