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Updated: Jun 3, 2025

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
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Well-Defined PtCo@Pt Core-Shell Nanodendrite Electrocatalyst for Highly Durable Oxygen Reduction Reaction.

Shixin Yin1, Yiting Song1, Heng Liu2

  • 1Key Laboratory for Ultrafine Materials of Ministry of Education, School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China.

Small (Weinheim an Der Bergstrasse, Germany)
|January 9, 2025
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Summary

Researchers developed novel 3D Pt7Co3@Pt core-shell nanodendrites for the oxygen reduction reaction (ORR). This advanced electrocatalyst shows superior activity and stability in acidic conditions, outperforming commercial catalysts.

Keywords:
Pt‐rich surfaceacidic ORRdendritic structurestabilitystructural evolution

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Efficient electrocatalysts are vital for oxygen reduction reaction (ORR) lifetime and cost.
  • Platinum-cobalt (PtCo) nanocrystals offer high activity but lack stability in acidic media.

Purpose of the Study:

  • To design and synthesize a highly active and stable electrocatalyst for acidic ORR.
  • To investigate the structure-property relationship of novel Pt-based nanodendrites.

Main Methods:

  • Self-assembly of small platinum nanoparticles (≈6 nm) to form 3D Pt7Co3@Pt core-shell nanodendrites (NDs).
  • Electrochemical characterization, including mass activity (MA) and specific activity (SA) measurements.
  • Accelerated durability testing (ADT) involving 40,000 potential-scanning cycles.

Main Results:

  • The 3D Pt7Co3@Pt NDs exhibited an enhanced MA of 0.54 A mgPt−1, three times higher than commercial Pt/C (0.17 A mgPt−1).
  • The nanodendrite structure demonstrated superior stability in acidic ORR, with only a 2.1% loss in MA after ADT.
  • Specific activity (SA) increased by 12.0% after ADT, indicating enhanced catalytic performance.

Conclusions:

  • The developed 3D Pt7Co3@Pt core-shell nanodendrites represent a highly active and stable electrocatalyst for acidic ORR.
  • The unique dendritic morphology and Pt-rich shell are key to the enhanced performance and durability.
  • This study provides valuable insights for designing next-generation, stable Pt-based electrocatalysts for energy applications.