"Superaerophobic" NiCo bimetallic phosphides for highly efficient hydrogen evolution reaction electrocatalysts.

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• Developing efficient electrocatalysts is crucial for hydrogen evolution reaction (HER) technologies.
• Platinum-based catalysts are highly effective but expensive, driving the search for alternatives.

Purpose of the Study:

• To fabricate a novel, high-performance electrocatalyst for the hydrogen evolution reaction (HER).
• To investigate the catalytic properties of a superaerophobic nickel-cobalt bimetallic phosphide.

Main Methods:

• Synthesis of a nickel-cobalt bimetallic phosphide electrocatalyst.
• Utilizing bimetal-organic frameworks as self-sacrificing templates.
• Electrochemical characterization of the catalyst for HER performance.

Main Results:

• The fabricated NiCo bimetallic phosphide catalyst exhibits 'superaerophobic' properties.
• An overpotential of only 205 mV was required to achieve a high HER current density of 800 mA cm⁻².
• The catalyst's performance exceeded that of commercial platinum on carbon (Pt/C).

Conclusions:

• The bimetal-organic framework templating approach is effective for creating advanced HER electrocatalysts.
• The developed NiCo bimetallic phosphide shows significant potential for industrial applications in HER.
• This work offers a promising strategy for designing cost-effective and high-performance electrocatalysts.