Controllable Potassium Iodide-Assisted Preparation of Two-dimensional SnS2 for Hydrogen Evolution Reaction

Abstract

The controllable preparation of Two-dimensional transition metal chalcogenides (TMDCs) is very important. However, the uncontrollable growth of SnS₂ by chemical vapor deposition (CVD) and the unsatisfactory performance of hydrogen evolution reaction (HER) based on SnS₂ have hindered its applications. Herein, we reported the direct synthesis of high-quality 1T-SnS₂ with various morphologies via potassium iodide-assisted CVD. On the basis of CVD technology, We have developed process technology to grow different shapes of SnS₂ from dot line to fishbone controlled by growth conditions. The growth mechanism of SnS₂ was studied, and their HER performance with different morphologies of SnS₂ was investigated. The growth trend of 2D SnS₂ provides a reference for the controllable preparation of TMDCs materials. These results demonstrate that TMDCs can adjust the performance of HER through shape control.