Breakthrough in Nanoparticle Research: Synthesis of Efficient Electrocatalysts

Researchers from Kunming University in China have made significant strides in the development of efficient electrocatalysts for oxygen reduction reactions. A newly published study details the synthesis of carbon-supported PtFeNi ternary alloy nanoparticles with ultralow platinum content, exhibiting superior mass activity and specific activity compared to binary counterparts and non-prelithiated controls. The research team employed a "prelithiation-deposition" strategy to synthesize the nanoparticles, which yielded notable improvements in catalytic activity and durability.

Key Takeaways:

• Researchers from Kunming University synthesized carbon-supported PtFeNi ternary alloy nanoparticles with ultralow platinum content (4.35 wt %) using a "prelithiation-deposition" strategy.
• The synthesized nanoparticles exhibited superior mass activity (3.41 A mgPt -1 at 0.9 V vs RHE) and specific activity (5.95 mA cm-2) compared to binary counterparts and non-prelithiated controls.
• Theoretical calculations revealed that the lithiation process induces new active sites in the carbon material, promoting the bonding of carbon to the metal.
• The synergistic electron precipitation effect and stress effect brought about by alloying were found to optimize the reaction pathways throughout the lifetime.
• The introduction of iron and nickel altered the electronic structure of platinum, leading to enhanced electronic interactions between the metal nanoparticles and the carbon carriers.
• The synthesized nanoparticles demonstrated higher catalytic activity and durability, making them suitable for large-scale implementation in proton exchange membrane fuel cells.

Statistics:

• PtFeNi/C-800 catalysts exhibited superior mass activity (3.41 A mgPt -1 at 0.9 V vs RHE).
• The specific activity of PtFeNi/C-800 catalysts was 5.95 mA cm-2.
• The researchers reported a 3.22-fold increase in mass activity and 2.09-fold increase in specific activity compared to PtFe/C-800.
• The study employed a "prelithiation-deposition" strategy to synthesize the PtFeNi/C-800 catalysts.

Sources:

• NewsRx. Recent Studies from Kunming University Add New Data to Nanoparticles (Ptfeni Trimetallic Alloy Nanoparticles As Electrocatalysts for Oxygen Reductions). Nanotechnology Weekly. May 12, 2025; p 2527.
• Dong Fang et al. Ptfeni Trimetallic Alloy Nanoparticles As Electrocatalysts for Oxygen Reductions. ACS Applied Nano Materials, 2025.