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Atomic-Level Regulated 2D ReSe2 : A Universal Platform Boostin Photocatalysis.

Jingrun Ran1, Ling Chen1, Deyu Wang1

  • 1School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, South Australia, 5005, Australia.

Advanced Materials (Deerfield Beach, Fla.)
|February 24, 2023
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Summary

Atomic-level engineering of defected rhenium diselenide (ReSe2) nanosheets significantly enhances solar hydrogen production. This versatile 2D material platform boosts photocatalytic water splitting across various semiconductors.

Keywords:
atomic-level active sitesdefected ReSe 2 nanosheetsinterface engineeringphotocatalytic H 2 evolution

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Area of Science:

  • Materials Science
  • Photocatalysis
  • Renewable Energy

Background:

  • Solar hydrogen generation via photocatalytic water splitting offers a sustainable and carbon-neutral energy solution.
  • Controllable atomic-level engineering of photocatalysts is crucial for enhancing their efficiency.
  • Two-dimensional (2D) materials offer unique properties for advanced catalytic applications.

Purpose of the Study:

  • To engineer defected rhenium diselenide (ReSe2) nanosheets (NSs) at the atomic level.
  • To investigate the impact of atomic-level engineering on photocatalytic hydrogen evolution.
  • To demonstrate the versatility of ReSe2 NSs as a platform for enhancing various semiconductor photocatalysts.

Main Methods:

  • Atomic-resolution aberration-corrected scanning transmission electron microscopy (AC-STEM).
  • Synchrotron-based X-ray absorption near edge structure (XANES) and in situ X-ray photoelectron spectroscopy (XPS).
  • Transient-state surface photovoltage (SPV) and photoluminescence (PL) spectroscopy, complemented by theoretical computations.

Main Results:

  • Atomic-level engineering of ReSe2 NSs significantly boosted photocatalytic H2 evolution on TiO2, CdS, ZnIn2S4, and C3N4.
  • The strongly coupled ReSe2/TiO2 interface and abundant atomic-level active sites in defected ReSe2 NSs were confirmed.
  • Enhanced charge separation and transfer at the ReSe2/TiO2 interface contributed to the raised activity.

Conclusions:

  • Defected ReSe2 NSs serve as a versatile platform for atomic-level engineering, significantly enhancing photocatalytic activity.
  • This work highlights the critical role of atomic-level synthesis and exploration of 2D materials for efficient energy conversion and storage.
  • The findings pave the way for developing advanced photocatalysts for solar fuel production.