Recent Advances in Thermochemical Water Splitting for Hydrogen Production Using Mixed Ionic-Electronic Conducting...

Area of Science:

• Materials Science
• Chemical Engineering
• Energy Science

Background:

• Global energy transition and carbon neutrality goals drive demand for zero-carbon hydrogen energy.
• Renewable energy-powered water electrolysis is key for green hydrogen, but conventional methods face economic and scalability challenges due to high energy use and noble metal catalysts.
• Polymer electrolyte membrane (PEM) water electrolysis is limited by cost and efficiency.

Purpose of the Study:

• To review the physicochemical mechanisms of mixed ionic-electronic conducting oxygen transport membrane (MIEC-OTM) reactors for hydrogen production.
• To examine factors influencing hydrogen production efficiency in MIEC-OTM systems.
• To propose a roadmap for industrial application of MIEC-OTM technology.

Main Methods:

• Systematic review of physicochemical mechanisms in oxygen transport membrane reactors.
• Analysis of the impact of membrane material design, catalytic interface optimization, and parameter synergy on hydrogen production.
• Examination of thermo-electrochemical synergistic energy conversion and process integration.

Main Results:

• MIEC-OTM reactors provide an innovative solution to the energy efficiency-cost paradox in hydrogen production.
• This technology overcomes thermodynamic equilibrium limitations and reduces electrical energy demand by integrating with medium- to high-temperature heat sources.
• Key factors influencing efficiency include membrane material properties, catalyst design, and operational parameters.

Conclusions:

• MIEC-OTM technology presents a promising alternative for efficient and scalable green hydrogen production.
• Future industrial applications require enhanced material stability, advanced multi-field coupled reactor designs, and optimized system energy efficiency.
• This approach supports the transition to sustainable energy systems.