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Metallic PtC monolayer as a promising hydrogen evolution electrocatalyst
1Department of Applied Physics, School of Science, Jiangsu University of Science and Technology, Zhenjiang 212100, China. louhuan@just.edu.cn.
Physical Chemistry Chemical Physics : PCCP
|January 16, 2025
Summary
Researchers designed a novel platinum-carbon (PtC) monolayer catalyst for efficient hydrogen evolution reactions (HER). This cost-effective catalyst shows excellent performance comparable to platinum, even under challenging conditions.
Area of Science:
- Materials Science
- Electrochemistry
- Computational Chemistry
Background:
- Developing efficient and cost-effective electrocatalysts for the hydrogen evolution reaction (HER) is crucial for clean energy technologies.
- Platinum (Pt) is highly effective but expensive; exploring Pt-based compounds with earth-abundant elements like carbon (C) offers a promising alternative.
Purpose of the Study:
- To design and identify highly efficient HER electrocatalysts using platinum and carbon.
- To investigate the catalytic performance and underlying mechanisms of novel PtC structures.
Main Methods:
- Employed first-principles structure search simulations to discover stable PtC monolayers.
- Analyzed electronic structure, adsorption/dissociation properties, and HER activity through theoretical calculations.
Main Results:
- Identified four stable PtC monolayers, including a novel PtC monolayer with a zigzag carbon chain.
- The PtC monolayer exhibits inherent metallicity, efficient H2O adsorption/dissociation, and HER activity comparable to commercial Pt.
- Achieved desirable Gibbs free energy of hydrogen adsorption (ΔGH*) and enhanced exchange current density due to favorable electronic properties and carbon chain contributions.
Conclusions:
- The novel PtC monolayer demonstrates excellent HER activity and stability, even under strain and solvent effects, making it a viable low-Pt loading catalyst.
- This PtC monolayer represents a promising, cost-effective alternative to traditional platinum catalysts for hydrogen production.
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