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Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
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Phase-Dependent Reverse Electronic Metal-Support Interaction to Boost Alkaline Hydrogen Evolution.

Binjie Li1,2, Kunkun Nie1,2, Kangning Wang1

  • 1State Key Laboratory of Flexible Electronics (LoFE) & Institute of Flexible Electronics (IFE), Northwestern Polytechnical University, Xi'an, 710129, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|November 11, 2025
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Summary
This summary is machine-generated.

The crystal phase of molybdenum disulfide (MoS2) supports dictates electronic metal-support interaction (EMSI). Regulating this interaction enhances catalytic activity for alkaline hydrogen evolution, crucial for efficient water electrolysis.

Keywords:
EMSIcharge transferhydrogen productionphase‐dependent

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Area of Science:

  • Materials Science
  • Catalysis
  • Electrochemistry

Background:

  • Electronic metal-support interaction (EMSI) is key for tuning catalyst electronic structures.
  • The influence of support crystal phase on EMSI remains underexplored.

Purpose of the Study:

  • To investigate the effect of molybdenum disulfide (MoS2) crystal phase on EMSI.
  • To reveal the charge transfer inversion phenomenon based on MoS2 crystal phase.
  • To enhance catalytic performance for hydrogen evolution reaction (HER).

Main Methods:

  • Synthesis of noble metals (Pt, Rh, Ru) supported on 2H-MoS2 and 1T-MoS2.
  • Characterization of electronic structures and charge transfer.
  • Electrochemical testing for alkaline hydrogen evolution reaction (HER).
  • Fabrication and testing of an anion exchange membrane water electrolyzer (AEMWE).

Main Results:

  • A charge transfer inversion was observed: noble metals donate electrons to 2H-MoS2 but receive electrons from 1T-MoS2.
  • Electron-enriched noble metals on 1T-MoS2 showed higher HER activity.
  • 1T-MoS2@Pt achieved a low overpotential of 18 mV at 10 mA cm-2.
  • Anion exchange membrane water electrolyzer with 1T-MoS2@Pt demonstrated excellent activity and stability.

Conclusions:

  • The crystal phase of MoS2 significantly impacts EMSI and catalytic performance.
  • Controlling charge transfer via support crystal phase is a viable strategy for designing efficient electrocatalysts.
  • This study offers insights for developing advanced catalysts for hydrogen production.