Progress in silicon-based materials for emerging solar-powered green hydrogen (H₂) production.

Area of Science:

• Materials Science
• Renewable Energy
• Photocatalysis

Background:

• Growing demand for sustainable energy drives research into water splitting and hydrogen fuel generation.
• Silicon-based compounds are attractive for hydrogen production due to abundance, low toxicity, and cost-effectiveness.
• Developing efficient, economical, and eco-friendly synthesis methods for silicon-based heterojunctions is critical.

Purpose of the Study:

• To review recent advancements in silicon (Si)-based photocatalysts for water splitting.
• To summarize developments, guide future research, and identify knowledge gaps.
• To provide a comprehensive understanding of Si-based photocatalysts by integrating theoretical and experimental findings.

Main Methods:

• Literature review of recent developments in Si-based photocatalysts.
• Analysis of synthesis methods, surface modifications, catalyst loading, and reaction conditions.
• Integration of theoretical insights and experimental findings.

Main Results:

• Silicon nanoparticles with high crystallinity, low oxygen concentration, and controlled calcination temperature exhibit high hydrogen evolution rates.
• Performance of Si-based photocatalysts is influenced by synthesis, modifications, loading, and reaction conditions.
• Balancing performance with economic and environmental factors remains a key challenge.

Conclusions:

• Si-based photocatalysts offer a viable route for sustainable hydrogen generation.
• Further research is needed to optimize photocatalytic performance and scalability.
• This review highlights the potential of Si-based materials in advancing clean energy solutions.