Facile and General Method to Synthesize Pt-Based High-Entropy-Alloy Nanoparticles

Area of Science:

• Materials Science
• Nanotechnology
• Catalysis

Background:

• Platinum-based high-entropy alloy nanoparticles (Pt-based HEA-NPs) exhibit exceptional properties for diverse catalytic applications.
• Current methods for preparing Pt-based HEA-NPs face challenges in terms of cost, scalability, and ease of synthesis.

Purpose of the Study:

• To develop a facile, low-cost, and scalable method for synthesizing Pt-based HEA-NPs.
• To investigate the autocatalytic behavior of platinum in the reduction process.
• To evaluate the electrocatalytic performance of the synthesized HEA-NPs.

Main Methods:

• Utilized a spray drying combined with thermal decomposition reduction (SD-TDR) technique.
• Synthesized single-phase solid solution Pt-based HEA-NPs with up to 10 elements on carbon supports.
• Investigated Pt autocatalytic behavior to enable low-temperature synthesis (minimum 300 °C).

Main Results:

• Successfully synthesized Pt-based HEA-NPs with controllable composition, size, and phase.
• Demonstrated the versatility of the SD-TDR method by using different supports.
• Achieved superior electrocatalytic performance for methanol oxidation reaction (MOR) with senary PtCoCuRuFeNi HEA-NPs compared to commercial Pt/C.

Conclusions:

• The SD-TDR method provides an efficient and scalable route for preparing Pt-based HEA-NPs.
• The autocatalytic nature of Pt significantly lowers the required synthesis temperature.
• Synthesized Pt-based HEA-NPs show promising potential for advanced catalytic applications, particularly in MOR.