Low-Voltage Hydrogen Peroxide Electrolyzer for Highly Efficient Power-to-Hydrogen Conversion

Power-to-hydrogen conversion via water electrolysis using renewable energy-sourced electricity has been considered for large-scale energy storage and grid balancing. Unfortunately, the state-of-the-art proton exchange membrane (PEM) electrolyzers are costly low in efficiency because of their use expensive iridium catalysts high overpotential to overcome barrier oxygen evolution reaction. Here, we demonstrate a low-cost highly efficient PEM hydrogen peroxide electrolyzer toward power-to-hydrogen conversion, which can be employed distributed systems based on sustainable electrochemical cycle peroxide. This H2O2 utilizes facile oxidation reaction (HPOR), significantly reducing anode potential cell voltage. Using iridium-free HPOR catalysts, work remarkably low-voltage range (0.81–1.12 V) with extremely voltage up 87% electric power consumption (ca. 24.8–32.3 kWh/kgH2), paving way future development economic environmentally friendly systems.