Direct Hydrogen Energy Conversion on Industrial-Current-Density.

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• Efficient hydrogen evolution reaction (HER) is crucial for sustainable hydrogen energy systems.
• Achieving high current densities in HER is a significant challenge for industrial applications.
• Developing advanced catalytic systems is key to overcoming these limitations.

Purpose of the Study:

• To propose a novel catalytic system for efficient hydrogen production at high current densities.
• To investigate atomic-level regulation of the electrochemical environment and activation energy.
• To enhance the electrocatalytic hydrogen evolution capability under alkaline conditions.

Main Methods:

• Development of a GDY/RhOx/NiO catalytic system.
• Atomic-level charge distribution and p-band center regulation.
• Theoretical calculations and experimental validation of catalytic performance.

Main Results:

• Demonstrated significant charge redistribution and p-d orbital coupling at the heterointerface.
• Achieved low overpotentials of 60 and 67 mV for current densities of 500 and 1000 mA cm⁻², respectively.
• Exhibited robust stability for 200 hours at industrial-grade current densities.

Conclusions:

• The intelligent charge regulation strategy via differential p-d orbital coupling enhances HER performance.
• The GDY/RhOx/NiO system offers a promising pathway for industrial electrocatalytic hydrogen production.
• This approach provides a new direction for designing high-performance catalysts for industrial processes.