Jump to main content
Jump to site search

Issue 20, 2019
Previous Article Next Article

Amorphous Fe2O3 for photocatalytic hydrogen evolution

Author affiliations

Abstract

Fe2O3 has drawn significant attention in photocatalysis due to its natural abundance, thermodynamic stability, environmental compatibility, low toxicity and narrow bandgap. Here, for the first time, we demonstrate that amorphous Fe2O3 nanoparticles can act as efficient and robust photocatalysts for solar H2 evolution without any cocatalysts. We also establish a plausible mechanism involving the amorphization-induced thermodynamic and dynamic behaviors of amorphous Fe2O3 upon photocatalytic hydrogen evolution. Thermodynamically, amorphization provides more surface states and larger carrier density, and thus elevates the conduction band edge to go across the H2 evolution potential level. Dynamically, amorphization-induced crystal field splitting weakening delocalizes the photogenerated carriers, and thus overcomes the excitation-wavelength-dependent small polaron trapping effect. These findings imply that amorphization may be a promising approach to functionalize and tailor other photocatalysts.

Graphical abstract: Amorphous Fe2O3 for photocatalytic hydrogen evolution

Back to tab navigation

Supplementary files

Publication details

The article was received on 13 Aug 2019, accepted on 02 Sep 2019 and first published on 03 Sep 2019


Article type: Paper
DOI: 10.1039/C9CY01621J
Catal. Sci. Technol., 2019,9, 5582-5592

  •   Request permissions

    Amorphous Fe2O3 for photocatalytic hydrogen evolution

    Z. Lin, C. Du, B. Yan and G. Yang, Catal. Sci. Technol., 2019, 9, 5582
    DOI: 10.1039/C9CY01621J

Search articles by author

Spotlight

Advertisements