Recent Research Progresses and Challenges for Practical Application of Large-Scale Solar Hydrogen Production

Area of Science:

• Sustainable energy technologies
• Chemical engineering
• Materials science

Background:

• Solar hydrogen production offers a CO2-free route to sustainable energy.
• Key systems include photovoltaic electrolysis (PV-EC), photoelectrochemical (PEC), and particulate photocatalytic (PC).
• Commercialization is hindered by performance limitations and economic feasibility at large scales.

Purpose of the Study:

• To review challenges in large-scale solar hydrogen production systems.
• To introduce recent advancements in core components, fabrication, and system design.
• To assess the current technical readiness for commercialization.

Main Methods:

• Summarizing challenges of PV-EC, PEC, and PC systems.
• Reviewing recent approaches to overcome these challenges.
• Analyzing large-scale system demonstrations and upscaled performance.

Main Results:

• Identified key performance and economic barriers for large-scale systems.
• Highlighted innovations in materials, fabrication, and system integration.
• Presented outdoor demonstration data and upscaled system performance metrics.

Conclusions:

• Progress in core components, fabrication, and design is crucial for commercialization.
• Demonstrations show increasing technical viability for large-scale solar hydrogen.
• Further research and development are needed for practical, widespread application.