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Related Experiment Video

Updated: Sep 26, 2025

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
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Hollow-Structure Pt-Ni Nanoparticle Electrocatalysts for Oxygen Reduction Reaction.

Quan Wang1, Baosen Mi1, Jun Zhou1

  • 1School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China.

Molecules (Basel, Switzerland)
|April 23, 2022
PubMed
Summary

New hollow-structure platinum-nickel (Pt-Ni) electrocatalysts show superior oxygen reduction reaction (ORR) activity and stability. These Pt-Ni catalysts outperform commercial options, offering enhanced durability for start-stop applications.

Keywords:
PEMFCcarbon-freeelectrocatalysthollow structureoxygen reduction reaction

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Nanotechnology

Background:

  • High oxygen reduction reaction (ORR) activity and stability are crucial for electrocatalysts.
  • Start-stop operation demands robust catalysts that resist degradation.

Purpose of the Study:

  • To investigate hollow-structure platinum-nickel (Pt-Ni) electrocatalysts for ORR applications.
  • To evaluate the activity, durability, and start-stop performance of these novel catalysts.

Main Methods:

  • Synthesis of hollow-structure Pt-Ni electrocatalysts using a sacrificial SiO2 template method.
  • Electrochemical characterization including Tafel and K-L plots to evaluate ORR kinetics.
  • Accelerated durability testing (ADT) and start-stop durability tests.

Main Results:

  • The Pt-Ni electrocatalyst demonstrated significantly higher specific activity (1.88 mA/cm2) and mass activity (0.49 A/mg) compared to commercial Pt/C.
  • The catalyst exhibited superior durability during ADT.
  • The Pt-Ni electrocatalyst showed good resistance to start-stop operation, with smaller drops in specific and mass activity (34.6% and 40.8%) than commercial catalysts.

Conclusions:

  • Hollow-structure Pt-Ni electrocatalysts are promising alternatives to commercial Pt/C for ORR.
  • These catalysts offer enhanced activity and stability, particularly for applications involving start-stop conditions.