Janus MoPC Monolayer with Superior Electrocatalytic Performance for the Hydrogen Evolution Reaction

Area of Science:

• Materials Science
• Catalysis
• Renewable Energy

Background:

• Developing earth-abundant, high-performance electrocatalysts for the hydrogen evolution reaction (HER) is critical for sustainable hydrogen production.
• Platinum (Pt)-based catalysts are highly effective but expensive and scarce, driving the search for alternatives.

Purpose of the Study:

• To identify and characterize novel, high-performance electrocatalysts for the hydrogen evolution reaction (HER).
• To explore earth-abundant materials with superior stability, conductivity, and catalytic activity comparable to platinum.

Main Methods:

• Utilized first-principles structure search simulations to identify potential catalyst candidates.
• Analyzed the electronic structure, stability, and catalytic properties of the proposed material.

Main Results:

• Identified a new two-dimensional (2D) Molybdenum Phosphorus Carbon (MoPC) material with a Janus structure as a promising HER catalyst.
• The MoPC monolayer demonstrated superior stability, excellent metallic conductivity, and remarkable HER catalytic activity.
• All constituent atoms (Mo, P, C) act as uniform active sites due to a near-zero ΔG_H* value, with a high active site density (1.46 × 10¹⁵ site/cm²).
• The catalyst maintains high activity under various conditions and facilitates H₂ production via the Volmer-Heyrovsky pathway.

Conclusions:

• The novel 2D MoPC material presents a highly promising, earth-abundant alternative to platinum for HER catalysis.
• The findings offer a viable pathway for the experimental synthesis of advanced HER electrocatalysts.