Ganoderma-Like MoS₂ /NiS₂ with Single Platinum Atoms Doping as an Efficient and Stable Hydrogen Evolution Reaction...

Area of Science:

• Materials Science
• Nanotechnology
• Catalysis

Background:

• Developing efficient and durable catalysts for the hydrogen evolution reaction (HER) is crucial for clean energy technologies.
• Molybdenum disulfide (MoS2) and nickel disulfide (NiS2) are promising materials, but their catalytic activity for HER often requires enhancement.
• Anchoring single atoms onto nanostructures can improve catalytic performance by maximizing atom utilization and modifying electronic properties.

Purpose of the Study:

• To synthesize a unique ganoderma-like MoS2/NiS2 heterostructure with isolated platinum (Pt) atoms.
• To investigate the structural and electronic properties of the novel heterostructure and its effect on catalytic activity.
• To evaluate the catalyst's performance for the hydrogen evolution reaction (HER) in terms of overpotential and durability.

Main Methods:

• Synthesis of a ganoderma-like MoS2/NiS2 heterostructure.
• Anchoring of isolated platinum (Pt) atoms onto the MoS2 nanosheets.
• Characterization of the heterostructure using advanced microscopy and spectroscopy techniques.
• Electrochemical testing for hydrogen evolution reaction (HER) performance, including overpotential and durability measurements.

Main Results:

• Successfully fabricated a novel ganoderma-like MoS2/NiS2 heterostructure with dispersed few-layer MoS2 nanosheets.
• Achieved ultrahigh loading of single Pt atoms (1.8 at%) anchored on MoS2 nanosheets due to favorable dispersibility and exposed edge sites.
• The resulting catalyst exhibited Pt-like HER activity with an ultralow overpotential of 34 mV and excellent durability (2% overpotential increase over 72 h).

Conclusions:

• The ganoderma-like MoS2/NiS2 heterostructure provides an effective platform for dispersing MoS2 and anchoring single Pt atoms.
• The unique structure and Pt doping significantly enhance the catalytic activity and durability for the hydrogen evolution reaction.
• This work presents a promising strategy for designing advanced electrocatalysts for sustainable hydrogen production.