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Core/Shell-Structured Carbon Support Boosting Fuel Cell Durability.

Tian-Wei Song1, Jia-Jun Yan1, Lei Tong1

  • 1Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China.

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Summary
This summary is machine-generated.

This study introduces a novel core/shell carbon support for durable platinum catalysts in proton exchange membrane fuel cells, effectively inhibiting degradation pathways for enhanced performance.

Keywords:
Pt particles‐coarsening resistancecarbon‐corrosion resistancecore/shell‐structured carbon supportdurabilityproton exchange membrane fuel cells

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Proton exchange membrane fuel cells (PEMFCs) require durable cathode catalysts to extend operational lifetime.
  • Current catalysts face degradation from carbon corrosion and platinum nanoparticle coarsening.
  • Existing durability strategies often address only one degradation pathway.

Purpose of the Study:

  • To develop a novel core/shell structured carbon support for cathode catalysts.
  • To simultaneously inhibit both carbon corrosion and electrocatalyst coarsening.
  • To enhance the overall durability of PEMFC cathode catalysts.

Main Methods:

  • Fabrication of a core/shell structured carbon support with distinct core and shell functionalities.
  • The core utilizes highly graphitized carbon for structural integrity.
  • The shell employs heteroatom-doped amorphous carbon for anchoring platinum nanoparticles.

Main Results:

  • The designed catalyst demonstrated simultaneous inhibition of carbon corrosion and platinum nanoparticle coarsening.
  • Achieved significantly low electrochemical surface area loss (13%/3%) and mass activity loss (27%/17%) after accelerated stress tests.
  • Exhibited minimal voltage loss (29 mV/4 mV) under high current densities, surpassing U.S. Department of Energy targets.

Conclusions:

  • The bifunctional core/shell carbon support effectively enhances catalyst durability in PEMFCs.
  • This approach offers a promising strategy for overcoming key degradation mechanisms in fuel cell catalysts.
  • The developed catalyst meets and exceeds critical durability benchmarks for next-generation fuel cell technologies.