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A Facile Route to Large-Area 2D Pt.

Minsik Kong1,2, Zhen Zhang2, Weiyin Chen1,2

  • 1Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|November 29, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed a cost-effective method using a gallium oxide (GaOx) layer to create ultrathin platinum (Pt) films for efficient hydrogen evolution reactions (HER). This innovation offers a scalable pathway for advanced catalytic and electronic applications.

Keywords:
2Dadhesion layer, hydrogen‐evolution reactionplatinumprintingsputtering

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Surface Science

Background:

  • Platinum (Pt) is a key catalyst for the hydrogen evolution reaction (HER), but its high cost hinders widespread industrial use.
  • Developing cost-effective alternatives or strategies to minimize Pt usage is crucial for sustainable energy technologies.

Purpose of the Study:

  • To develop a method for creating ultrathin, continuous platinum films with high catalytic activity and stability.
  • To investigate the role of an oxygen-deficient gallium oxide (GaOx) adhesion layer in controlling Pt film morphology and performance.

Main Methods:

  • Utilized direct current (DC) sputtering to deposit sub-nanometer thick 2D Pt films on a GaOx adhesion layer.
  • Characterized the films' morphology, mechanical robustness, transparency, conductivity, and thermal stability.
  • Evaluated the electrocatalytic performance for HER under demanding conditions.

Main Results:

  • The GaOx layer successfully reversed dewetting thermodynamics, enabling continuous 2D Pt films at sub-nanometer thickness.
  • The resulting Pt/GaOx films exhibited excellent mechanical robustness, transparency, conductivity, and thermal stability.
  • A 1 nm Pt film demonstrated electrocatalytic activity comparable to bulk Pt, sustaining 1 A cm-2 for 100 hours without degradation.

Conclusions:

  • The strategy of using an adhesion layer provides a scalable route to ultrathin catalytic and electronic platforms, applicable to other noble metals.
  • This approach significantly reduces Pt loading while maintaining high catalytic efficiency, addressing cost limitations for HER applications.