1T-MoS₂ Nanosheets Coupled with CoS₂ Nanoparticles: Electronic Modulation for Efficient Electrochemical Nitrogen...

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• Electrocatalytic nitrogen reduction reaction (eNRR) is a promising alternative to the Haber-Bosch process for ammonia synthesis.
• Current eNRR electrocatalysts suffer from low activity and selectivity.
• Developing efficient electrocatalysts is crucial for sustainable ammonia production.

Purpose of the Study:

• To design and synthesize a novel CoS₂/1T-MoS₂ heterostructure for eNRR.
• To investigate the catalytic performance of the CoS₂/1T-MoS₂ heterostructure for ammonia production.
• To understand the mechanism behind the enhanced eNRR activity.

Main Methods:

• Synthesis of CoS₂ nanoparticles uniformly loaded on 1T-MoS₂ nanosheets.
• Electrocatalytic performance testing for ammonia synthesis.
• Theoretical calculations (e.g., DFT) to elucidate the reaction mechanism.

Main Results:

• The CoS₂/1T-MoS₂ heterostructure demonstrated significantly improved eNRR activity and selectivity.
• Achieved an ammonia yield of 59.3 μg h^-1 mg^-1 and a Faradaic efficiency of 26.6%.
• Theoretical calculations revealed optimized electronic structure and reduced energy barriers for N₂ reduction.

Conclusions:

• The CoS₂/1T-MoS₂ heterostructure is an effective electrocatalyst for eNRR.
• The synergistic effect between CoS₂ and 1T-MoS₂ enhances N₂ absorption and activation.
• This work provides a new pathway for designing high-performance electrocatalysts for sustainable ammonia synthesis.