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Related Experiment Video

Updated: Oct 26, 2025

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
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Intermetallic FePt@PtBi Core-Shell Nanoparticles for Oxygen Reduction Electrocatalysis.

Jingyu Guan1,2, Shaoxuan Yang1,2, Tongtong Liu1,2

  • 1State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.

Angewandte Chemie (International Ed. in English)
|July 31, 2021
PubMed
Summary
This summary is machine-generated.

New platinum-bismuth (PtBi) core-shell nanoparticles significantly boost fuel cell performance. These engineered catalysts offer enhanced activity and stability for the oxygen reduction reaction (ORR), overcoming poisoning issues.

Keywords:
electrocatalysisoxygen reduction reactionplatinumstrain effectsurface engineering

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Developing active and stable platinum (Pt)-based electrocatalysts is crucial for fuel cell applications.
  • Enhancing electrocatalyst performance requires precise control over the Pt surface's physicochemical state.
  • Resistance to poisoning is a key challenge for practical fuel cell implementation.

Purpose of the Study:

  • To engineer nanostructured platinum alloy electrocatalysts with improved oxygen reduction reaction (ORR) activity and stability.
  • To investigate the effect of surface modification using platinum-bismuth (PtBi) alloy shells on Pt-based nanoparticles.
  • To assess the poisoning tolerance of the engineered electrocatalysts.

Main Methods:

  • A general surface-engineering approach was employed to create nanostructured Pt alloys.
  • Core-shell nanoparticles, specifically FePt@PtBi, were synthesized by coating PtBi alloy shells onto FePt cores.
  • Electrocatalytic performance, including mass and specific activity for ORR, was evaluated and compared to benchmark Pt/C catalysts.
  • Methanol and carbon monoxide tolerance tests were conducted.

Main Results:

  • FePt@PtBi core-shell nanoparticles exhibited superior ORR performance, with mass activity 7 times higher and specific activity 11 times higher than Pt/C.
  • The engineered FePt@PtBi catalyst demonstrated significantly improved tolerance to methanol and carbon monoxide poisoning compared to conventional Pt-based catalysts.
  • Enhanced performance is attributed to compressive strain and charge displacement effects induced by Pt-Bi bonding.

Conclusions:

  • Surface engineering via PtBi alloy shell coating is an effective strategy for enhancing Pt-based ORR electrocatalysts.
  • FePt@PtBi core-shell nanoparticles represent a promising advanced electrocatalyst for fuel cell applications.
  • The developed catalysts offer a pathway to overcome stability and poisoning limitations in current fuel cell technology.