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Light-Induced Ultrafast Charge Transfer in Pt-Modified Cs2PdBr6 for Efficient Electrocatalytic Hydrogen Evolution.

Baoyi Liu1, Haibo Ning1, Zhenghao Gong1

  • 1Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China.

ACS Applied Materials & Interfaces
|July 1, 2026
PubMed
Summary

This study introduces a platinum-modified halide perovskite (Cs2PdBr6@Pt1.5) for efficient light-assisted electrocatalysis. The material demonstrates excellent water stability and a low overpotential for hydrogen evolution, advancing energy conversion technologies.

Keywords:
electrocatalytic water splittinghalide perovskiteshydrogen evolution reactioninterfacial charge transferlight-assisted

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Photocatalysis

Background:

  • Halide perovskites possess excellent optoelectronic properties but are underutilized in electrocatalysis.
  • Understanding light-assisted electrocatalysis mechanisms in perovskites is crucial for unlocking their potential.

Purpose of the Study:

  • To design and investigate a platinum-modified halide perovskite for enhanced light-assisted electrocatalysis.
  • To elucidate the mechanisms behind improved catalytic performance.

Main Methods:

  • Fabrication of Pt-modified Cs2PdBr6 (Cs2PdBr6@Pt1.5) all-inorganic halide perovskite.
  • Electrocatalytic testing for hydrogen evolution reaction (HER).
  • Femtosecond transient absorption spectroscopy and Density Functional Theory (DFT) calculations.

Main Results:

  • Cs2PdBr6@Pt1.5 achieved a low overpotential (11 mV at 10 mA cm-2) with remarkable water stability.
  • Pt incorporation enhanced charge separation and migration, boosting HER performance.
  • DFT calculations confirmed electron transfer from perovskite to Pt and optimized intermediate adsorption.

Conclusions:

  • Pt-modified halide perovskites offer a stable and efficient platform for light-assisted electrocatalytic water splitting.
  • This work provides insights into the mechanisms of light-enhanced electrocatalysis in perovskite materials.
  • Potential applications in renewable energy conversion and storage.