Van der Waals Heterostructures-Recent Progress in Electrode Materials for Clean Energy Applications.

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Van der Waals (vdW) heterostructures possess unique layered morphologies.
• These structures blend electrochemical properties from 2D sheet components.
• They offer potential as alternatives to precious metals in energy storage.

Purpose of the Study:

• To review recent progress (last 3 years) in vdW electrocatalysis.
• To evaluate vdW materials for oxygen reduction (ORR), oxygen evolution (OER), and hydrogen evolution (HER) reactions.
• To compare vdW catalysts with platinum-based catalysts in energy systems.

Main Methods:

• Literature review of recent research on vdW electrocatalysis.
• Analysis of catalytic activity for ORR, OER, and HER.
• Comparison with commercial platinum-based catalysts.

Main Results:

• Stacking vdW materials, especially with graphene derivatives, improves HER activity.
• Electronic coupling between 2D materials and metallic surfaces enhances electron transfer.
• Combining vdW heterostructures with d-electron-rich metals (e.g., gold) offers dual advantages.

Conclusions:

• vdW heterostructures show significant potential for catalysis in energy storage systems.
• Further research is needed to elucidate HER reaction mechanisms, particularly electronic coupling effects.
• Development of affordable synthetic routes for controlled vdW catalysis is an emerging area.