Enhanced charge transport in ReSe₂-based 2D/3D electrodes for efficient hydrogen evolution reaction.

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Developing efficient electrocatalysts for the hydrogen evolution reaction (HER) is crucial for clean energy technologies.
• Rhenium diselenide (ReSe2) is a promising material, but its catalytic activity needs enhancement.
• Integration with conductive supports can improve charge transport and catalytic efficiency.

Purpose of the Study:

• To synthesize ultra-high-density rhenium diselenide (ReSe2) nanoflakes on porous carbon cloth (PCC).
• To investigate the structural and electronic properties of the ReSe2/PCC composite.
• To evaluate the electrocatalytic performance of the ReSe2@PCC electrode for the hydrogen evolution reaction (HER).

Main Methods:

• Chemical vapor deposition (CVD) for synthesizing ReSe2 nanoflakes on PCC.
• Characterization of the material's morphology, structure, and bonding.
• Electrochemical testing to assess HER performance, including overpotential and stability.

Main Results:

• Achieved ultra-high-density ReSe2 nanoflakes on a 2D/3D porous carbon cloth structure.
• Observed enhanced electron transport due to small size effects and interfacial C-Se bonding.
• Demonstrated superior HER performance for heat-treated ReSe2@PCC compared to state-of-the-art ReX2 electrodes.

Conclusions:

• The ReSe2@PCC composite offers a highly efficient and stable electrode for HER.
• The synergistic effects between ReSe2 nanoflakes and PCC significantly boost catalytic activity.
• This work presents a promising strategy for designing advanced electrocatalysts for hydrogen production.