Laser Synthesis of Platinum Single-Atom Catalysts for Hydrogen Evolution Reaction
Hengyi Guo1, Lingtao Wang1, Xuzhao Liu1,2
1Department of Materials, School of Natural Science, The University of Manchester, Oxford Road, Manchester M13 9PL, UK.
Researchers developed a novel laser annealing method to create highly efficient platinum single-atom catalysts (SACs) on a carbon substrate for the hydrogen evolution reaction (HER). This method significantly enhances catalytic activity while minimizing platinum usage, offering a scalable solution for electrocatalysis.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Platinum (Pt)-based catalysts are effective for the electrocatalytic hydrogen evolution reaction (HER).
- High cost and limited availability of Pt necessitate reduced Pt loading while maintaining high catalytic efficiency.
- Single-atom catalysts (SACs) offer a promising strategy for maximizing Pt utilization.
Purpose of the Study:
- To develop a novel, efficient, and scalable synthesis method for Pt SACs.
- To investigate the electrocatalytic performance of Pt SACs for the HER.
- To reduce Pt loading in catalysts for HER applications.
Main Methods:
- A two-step laser annealing process using infrared (IR) and ultraviolet (UV) lasers.
- Synthesis of Pt SACs on a metal-organic framework (MOF)-derived carbon substrate (ZIF67@ZIF8).
- Characterization of the catalyst's structure, Pt loading (0.86 wt. %), and electrocatalytic activity for HER.
Main Results:
- The synthesized Pt-LIA-ZIF8@ZIF67 catalyst demonstrated exceptional HER activity in acidic conditions.
- Atomically dispersed Pt on the carbon substrate showed a low overpotential (68.8 mV at 10 mA cm⁻²).
- The catalyst achieved a mass activity 20.52 times higher than commercial Pt/C at 50 mV vs. RHE.
Conclusions:
- The laser annealing method is a simple, fast, and versatile approach for producing highly active Pt SACs.
- The developed Pt SACs show great potential for efficient and cost-effective electrocatalytic hydrogen production.
- The synthesis method is scalable for potential mass production of SACs.
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