Efficient alkaline hydrogen evolution electrocatalysis enabled by an amorphous Co-Mo-B film.

Area of Science:

• Electrochemistry
• Materials Science
• Catalysis

Background:

• Efficient hydrogen evolution reaction (HER) catalysts are crucial for sustainable energy.
• Amorphous cobalt-boron (Co-B) materials show promise but require further enhancement.
• Titanium mesh offers a robust and conductive substrate for catalyst development.

Purpose of the Study:

• To develop a highly active and durable electrocatalyst for HER in alkaline media.
• To investigate the synergistic effects of incorporating molybdenum into Co-B films.
• To evaluate the performance of amorphous Co-Mo-B films deposited on Ti mesh.

Main Methods:

• One-step electrodeposition of amorphous Co-Mo-B films onto Ti mesh.
• Electrochemical characterization using techniques like linear sweep voltammetry.
• Durability testing to assess long-term catalytic stability.

Main Results:

• The Co-Mo-B/Ti electrode exhibited significantly enhanced HER performance compared to Co-B/Ti.
• An overpotential of only 110 mV was required to achieve a current density of 20 mA cm-2.
• The catalyst demonstrated excellent electrochemical durability, maintaining activity for over 32 hours.

Conclusions:

• Amorphous Co-Mo-B films on Ti mesh are highly effective electrocatalysts for HER.
• The incorporation of molybdenum dramatically improves catalytic activity and stability.
• This material presents a promising pathway for efficient alkaline hydrogen production.