Morphological Engineering of Winged Au@MoS2 Heterostructures for Electrocatalytic Hydrogen Evolution

Yuan Li, Marek B. Majewski, Saiful M. Islam, Shiqiang Hao, Akshay A. Murthy, Jennifer G. Distefano, Eve D. Hanson, Yaobin Xu, Chris Wolverton, Mercouri G. Kanatzidis, Michael R. Wasielewski, Xinqi Chen*, Vinayak P. Dravid

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

58 Scopus citations

Abstract

Molybdenum disulfide (MoS2) has been recognized as a promising cost-effective catalyst for water-splitting hydrogen production. However, the desired performance of MoS2 is often limited by insufficient edge-terminated active sites, poor electrical conductivity, and inefficient contact to the supporting substrate. To address these limitations, we developed a unique nanoarchitecture (namely, winged Au@MoS2 heterostructures enabled by our discovery of the "seeding effect" of Au nanoparticles for the chemical vapor deposition synthesis of vertically aligned few-layer MoS2 wings). The winged Au@MoS2 heterostructures provide an abundance of edge-terminated active sites and are found to exhibit dramatically improved electrocatalytic activity for the hydrogen evolution reaction. Theoretical simulations conducted for this unique heterostructure reveal that the hydrogen evolution is dominated by the proton adsorption step, which can be significantly promoted by introducing sufficient edge active sites. Our study introduces a new morphological engineering strategy to make the pristine MoS2 layered structures highly competitive earth-abundant catalysts for efficient hydrogen production.

Original languageEnglish (US)
Pages (from-to)7104-7110
Number of pages7
JournalNano letters
Volume18
Issue number11
DOIs
StatePublished - Nov 14 2018

Keywords

  • Winged Au@MoS
  • chemical vapor deposition
  • heterostructure
  • hydrogen evolution reaction
  • seeding effect

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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