Piezocatalysis-Enabled High-Efficiency Hydrogen Evolution with Single-Atom Platinum on MoS₂ Nanoflowers

Area of Science:

• Materials Science
• Catalysis
• Nanotechnology

Background:

• Single-atom catalysts (SACs) offer revolutionary performance in chemical reactions.
• Molybdenum disulfide (MoS2) nanoflowers (NFs) are promising catalytic supports.
• Efficient hydrogen evolution reactions (HER) are crucial for clean energy.

Purpose of the Study:

• To develop a novel piezoelectric catalytic system using single-atom platinum-modified MoS2 NFs.
• To enhance hydrogen evolution reactions (HER) efficiency and sustainability.
• To investigate the catalytic mechanisms and performance characteristics.

Main Methods:

• Synthesis of single-atom platinum-modified MoS2 NFs.
• Characterization using HAADF-STEM, XANES, EXAFS, and PFM.
• Performance evaluation through HER measurements, TRPL, EPR, and DFT simulations.

Main Results:

• Single-atom platinum successfully incorporated onto MoS2 NFs.
• Increased piezoresponse amplitude and extended carrier lifetime (5.7 ns) observed.
• Fourfold increase in hydrogen production efficiency (2206.15 µmol·g-1·h-1) achieved.
• DFT simulations confirmed enhanced adsorption and reduced energy barriers.

Conclusions:

• Single-atom Pt-modified MoS2 NFs represent a highly efficient piezoelectric catalyst for HER.
• The system demonstrates potential for sustainable clean hydrogen energy production.
• Structural modification and electronic properties synergistically enhance catalytic activity.