Design of 2D Layered Catalyst by Coherent Heteroepitaxial Conversion for Robust Hydrogen Generation

Yeoseon Sim, Aram Yoon, Hee Seong Kang, Jinsung Kwak, Se Yang Kim, Yongsu Jo, Daeseong Choe, Woongki Na, Min Hee Lee, Soon Dong Park, Seunguk Song, Daeyong Kim, Jung Woo Yoo, Sung Youb Kim, Hyeonsik Cheong, Jae Sung Lee, Chul Ho Lee, Zonghoon Lee, Soon Yong Kwon

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The structural engineering of 2D layered materials is emerging as a powerful strategy to design catalysts for high-performance hydrogen evolution reaction (HER). However, the ultimate test of this technology under typical operating settings lies in the reduced performance and the shortened lifespan of these catalysts. Here, a novel approach is proposed to design efficient and robust HER catalysts through out-of-plane deformation of 2D heterojunction using metal-organic chemical vapor deposition. High-yield, single-crystalline WTe2 nanobelts are used as an epitaxial template for their coherent conversion to WS2. During the conversion process, the WTe2/WS2 heterostructure containing both lateral and vertical junctions are achieved by coherent heteroepitaxial stacking despite differences in symmetry. The lattice coherency drives out-of-plane deformation of heteroepitaxially grown WS2. The increase in the effective surface area and decrease in the electron-transfer resistance across the 2D heterojunctions in turn enhances the HER performance as well as the long-term durability of these electrocatalysts.

Original languageEnglish
Article number2005449
JournalAdvanced Functional Materials
Volume31
Issue number9
DOIs
Publication statusPublished - 2021 Feb 24

Keywords

  • 2D heterojunctions
  • atomic-scale engineering
  • coherent heteroepitaxial conversion
  • hydrogen evolution reaction
  • metal-organic chemical vapor deposition

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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