Ru Se@MoS₂ hybrid as a highly efficient electrocatalyst toward hydrogen evolution reaction

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• Efficient and stable catalysts are crucial for the alkaline hydrogen evolution reaction (HER).
• Catalyst design requires consideration of both water dissociation and hydrogen adsorption processes.

Purpose of the Study:

• To synthesize and evaluate a RuSe@MoS2 hybrid catalyst for enhanced HER performance.
• To investigate the bifunctional mechanism and synergetic effects in the hybrid catalyst.

Main Methods:

• Two-step hydrothermal synthesis of RuSe nanoparticles decorated on MoS2.
• Electrochemical characterization of the catalyst's HER activity and stability in alkaline and acidic media.

Main Results:

• The RuSe@MoS2 catalyst achieved a low overpotential of 45 mV at 10 mA cm-2 with a Tafel slope of 42.9 mV dec-1 in basic media.
• Enhanced HER activity and stability were observed in both alkaline and acidic (0.5 M H2SO4) conditions compared to pure RuSe and MoS2.
• The catalyst demonstrated superior electrochemical stability during long-term HER operation.

Conclusions:

• The RuSe@MoS2 hybrid catalyst exhibits exceptional bifunctional catalytic activity for HER.
• Synergistic effects between RuSe and MoS2 enhance active sites, conductivity, and catalytic kinetics.
• The catalyst shows significant potential for efficient hydrogen production.