Lattice -Mismatch-Induced Ultrastable 1T-Phase MoS2-Pd/Au for Plasmon-Enhanced Hydrogen Evolution.
Bo ShangXiaoqiang CuiLin JiaoKun QiYingwei WangJinchang FanYuanyuan YueHaiyu WangQiaoliang BaoXiaofeng FanShuting WeiWei SongZhiliang ChengShaojun GuoWeitao ZhengPublished in: Nano letters (2019)
Metallic 1T-phase transition metal dichalcogenides (TMDs) are of considerable interest in enhancing catalytic applications due to their abundant active sites and good conductivity. However, the unstable nature of 1T-phase TMDs greatly impedes their practical applications. Herein, we developed a new approach for the synthesis of highly stable 1T-phase Au/Pd-MoS2 nanosheets (NSs) through a metal assembly induced ultrastable phase transition for achieving a very high electrocatalytic activity in the hydrogen evolution reaction. The phase transition was evoked by a novel mechanism of lattice-mismatch-induced strain based on density functional theory (DFT) calculations. Raman spectroscopy and transmission electron microscopy (TEM) were used to confirm the phase transition on experimental grounds. A novel heterostructured 1T MoS2-Au/Pd catalyst was designed and synthesized using this mechanism, and the catalyst exhibited a 0 mV onset potential in the hydrogen evolution reaction under light illumination. Therefore, this method can potentially be used to fabricate 1T-phase TMDs with remarkably enhanced activities for different applications.
Keyphrases
- reduced graphene oxide
- density functional theory
- transition metal
- visible light
- room temperature
- gold nanoparticles
- high glucose
- quantum dots
- diabetic rats
- highly efficient
- molecular dynamics
- raman spectroscopy
- sensitive detection
- ionic liquid
- metal organic framework
- electron microscopy
- carbon dioxide
- molecular docking
- molecular dynamics simulations
- climate change