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Multi-atom Pt and PtRu catalysts for high performance AEMFCs with ultra-low PGM content

Journal Article · · Applied Catalysis. B, Environmental
 [1];  [2];  [3];  [4];  [3];  [2];  [4];  [2];  [4];  [2];  [2]
  1. Univ. of South Carolina, Columbia, SC (United States); OSTI
  2. Univ. of South Carolina, Columbia, SC (United States)
  3. Synchrotron SOLEIL, Gif-sur-Yvette (France)
  4. Montpellier Univ. (France); Centre National de la Recherche Scientifique (CNRS) (France)
To reduce the platinum group metal (PGM) loading in anion exchange membrane fuel cells (AEMFCs), it is important to transition to catalysts with very low PGM content, and eventually to catalysts that are completely PGM-free. Here, in this work, four supported low-PGM Pt and PtRu catalysts were prepared using a new, simple, scalable technique: Controlled Surface Tension (CST) method. CST allows for a high density of very small multi-atom clusters. Catalysts were physically characterized using a wide array of techniques and tested for their ORR and HOR activity both ex-situ and integrated into operating AEMFCs. The PGM loading was reduced by a factor of 14 while achieving comparable performance to commercial catalysts. AEMFCs were also assembled with ultralow PGM loading (0.05 mgPGM cm-2), where PtRu anodes were paired with Fe–N–C cathodes to achieve a specific power of 25 W/mgPGM (40 W/mgPt).
Research Organization:
Pennsylvania State Univ., University Park, PA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
EE0008433
OSTI ID:
2418627
Alternate ID(s):
OSTI ID: 1909753
Journal Information:
Applied Catalysis. B, Environmental, Journal Name: Applied Catalysis. B, Environmental Journal Issue: C Vol. 325; ISSN 0926-3373
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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