Water Splitting: From Electrode to Green Energy System

Area of Science:

• Renewable Energy
• Electrochemistry
• Materials Science

Background:

• Industrial hydrogen (H₂) production relies on natural gas reforming, a process that consumes nonrenewable energy and releases greenhouse gases.
• Electrochemical water splitting presents a sustainable and pollution-free alternative for H₂ generation.
• Integrating green energy systems is crucial to minimize energy consumption and external power demands for water splitting.

Purpose of the Study:

• To review recent advancements in green energy systems for efficient and cost-effective electrochemical water splitting.
• To highlight the potential of various renewable energy sources in driving H₂ production.
• To encourage further research and development in sustainable H₂ generation.

Main Methods:

• Review of existing literature on green energy systems applied to water splitting.
• Discussion of various technologies including photoelectrode devices, solar cells, thermoelectric devices, triboelectric nanogenerators, and pyroelectric devices.
• Analysis of the electrochemical water-gas shift device.

Main Results:

• Various green energy systems have been developed for efficient H₂ production through water splitting.
• These systems demonstrate the feasibility of harvesting environmental energy to reduce external power consumption.
• Notable progress has been made in utilizing diverse renewable sources for H₂ generation.

Conclusions:

• Green energy systems offer a promising pathway for low-cost, pollution-free, and sustainable hydrogen production.
• Continued development of these systems is essential for transitioning to a clean energy future.
• This review provides insights into current progress and future directions for renewable H₂ energy.