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Photocatalytic Properties of ZnO:Al/MAPbI3/Fe2O3 Heterostructure: First-Principles Calculations.

Ahmed Al-Shami1,2, Anass Sibari3, Zouhir Mansouri1

  • 1Laboratory of Condensed Matter and Interdisciplinary Sciences, Physics Department, Faculty of Sciences, Mohammed V University in Rabat, Rabat 10100, Morocco.

International Journal of Molecular Sciences
|March 11, 2023
PubMed
Summary

This study investigates a novel photocatalyst for high hydrogen production. The engineered perovskite heterostructure demonstrates efficient z-scheme water splitting, offering a promising avenue for sustainable hydrogen fuel generation.

Keywords:
density functional theoryheterostructurehydrogen evolution reactionlead halide perovskitephotocatalysisz-scheme mechanism

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Area of Science:

  • Materials Science
  • Photocatalysis
  • Renewable Energy

Background:

  • Methylammonium lead halide perovskites show promise for photocatalysis.
  • Stability and efficiency challenges hinder practical applications.
  • Developing robust perovskite-based systems is crucial for solar fuel production.

Purpose of the Study:

  • To theoretically investigate a novel ZnO:Al/MAPbI3/Fe2O3 heterostructure as a photocatalyst.
  • To explore its hydrogen production yield via a z-scheme mechanism.
  • To understand the role of each component in enhancing photocatalytic activity and stability.

Main Methods:

  • Theoretical investigations using computational methods.
  • Analysis of a z-scheme photocatalysis mechanism.
  • Evaluation of charge transfer, electron-hole separation, and recombination dynamics.

Main Results:

  • The ZnO:Al/MAPbI3/Fe2O3 heterostructure achieves high hydrogen production yield under visible light.
  • Fe2O3:MAPbI3 acts as an electron donor for hydrogen evolution reaction (HER).
  • ZnO:Al protects MAPbI3 from degradation and improves charge transfer.
  • Enhanced electron-hole separation and reduced recombination significantly boost photocatalytic activity.

Conclusions:

  • The theoretical hydrogen production rates are 265.05 μmol/g (neutral pH) and 362.99 μmol/g (acidic pH 5).
  • This engineered perovskite heterostructure shows significant potential for stable and efficient photocatalytic hydrogen production.
  • The findings provide valuable insights for developing advanced halide perovskites for solar fuel applications.