Lattice -mismatch-induced ultrastable 1T-phase MoS2-Pd/Au for plasmon-enhanced hydrogen evolution

Bo Shang, Xiaoqiang Cui, Lin Jiao, Kun Qi, Yingwei Wang, Jinchang Fan, Yuanyuan Yue, Haiyu Wang, Qiaoliang Bao, Xiaofeng Fan, Shuting Wei, Wei Song, Zhiliang Cheng, Shaojun Guo, Weitao Zheng

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25 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)2758-2764
Number of pages7
JournalNano Letters
Volume19
Issue number5
DOIs
Publication statusPublished - 8 May 2019

Keywords

  • electrocatalytic
  • hydrogen evolution
  • molybdenum disulfide
  • Phase transition
  • ultrafast spectroscopy

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