Directional editing of self-supported nanoarray electrode for adaptive paired-electrolysis

Area of Science:

• Sustainable energy conversion systems
• Electrocatalysis
• Renewable energy technologies

Background:

• Anodic oxidation offers a sustainable pathway for hydrogen production using renewable electricity.
• Developing efficient electrocatalysts is crucial for energy conversion systems.
• Self-supported nanoarray platforms provide a versatile base for advanced catalysis.

Purpose of the Study:

• To fabricate a universal self-supported nanoarray platform for adaptive electrocatalysis.
• To achieve efficient hydrogen evolution reaction (HER) and alcohol oxidation.
• To demonstrate energy-efficient production of hydrogen and value-added chemicals.

Main Methods:

• Fabrication of a versatile and universal self-supported nanoarray platform.
• Intelligent editing of the platform for adaptive electrocatalysis.
• Utilizing membrane-free pair-electrolysis coupling HER and ethylene glycol oxidation reaction (EGOR).

Main Results:

• The nanoarray electrocatalysts demonstrated excellent catalytic activity.
• The membrane-free system required only 1.25 V to achieve 10 mA cm⁻² current density for HER and EGOR.
• Simultaneous production of H₂ and formate with high Faradaic efficiency and stability was achieved.

Conclusions:

• The developed self-supported nanoarray platform enables energy-efficient hydrogen production.
• This approach facilitates the simultaneous generation of high-purity H₂ and valuable chemicals.
• The platform showcases significant potential for sustainable energy conversion systems.