Infrared Light-Induced Anomalous Defect-Mediated Plasmonic Hot Electron Transfer for Enhanced Photocatalytic Hydrogen Evolution

Zichao Lian, Fan Wu, Jiangzhi Zi, Guisheng Li, Wei Wang, Hexing Li

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Efficient utilization of infrared (IR) light, which occupies almost half of the solar energy, is an important but challenging task in solar-to-fuel transformation. Herein, we report the discovery of CuS@ZnS core@shell nanocrystals (CSNCs) with strong localized surface plasmon resonance (LSPR) characteristics in the IR light region showing enhanced photocatalytic activity in hydrogen evolution reaction (HER). A unique “plasmon-induced defect-mediated carrier transfer” (PIDCT) at the heterointerfaces of the CSNCs divulged by time-resolved transient spectroscopy enables producing a high quantum yield of 29.2%. The CuS@ZnS CSNCs exhibit high activity and stability in H2 evolution under near-IR light irradiation. The HER rate of CuS@ZnS CSNCs at 26.9 μmol h-1 g-1 is significantly higher than those of CuS NCs (0.4 μmol h-1 g-1) and CuS/ZnS core/satellite heterostructured NCs (15.6 μmol h-1 g-1). The PIDCT may provide a viable strategy for the tuning of LSPR-generated carrier kinetics through controlling the defect engineering to improve photocatalytic performance.

Original languageEnglish (US)
Pages (from-to)15482-15487
Number of pages6
JournalJournal of the American Chemical Society
Volume145
Issue number28
DOIs
StatePublished - Jul 19 2023

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry

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