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Designing high performance Pt monolayer core–shell electrocatalysts for fuel cells

Journal Article · · Current Opinion in Electrochemistry
In proton exchange membrane fuel cells, platinum (Pt) has been the dominant choice for both the cathode and the anode catalysts. The high Pt content and high associated costs particularly at the cathode, and sluggish oxygen reduction reaction (ORR) kinetics and poor stability, remain a challenge. Pt monolayer (ML) catalysts offer a distinctively reduced Pt content while providing considerable possibilities for enhancing their catalytic activity and stability for the ORR. Here, we first review the achievement in active and stable Pt ML on palladium (Pd) nanoparticle catalysts for the ORR. We then describe the mechanisms that rationalize their high activity and durability. Recently, we developed several novel nanostructured cores to further improve the ORR activity and stability by optimizing their surface orientation, composition, and morphology. The results from the Pt ML catalysts significantly impact the research of electrocatalysis and fuel-cell technology, as they demonstrate an exceptionally effective way of design and syntheses of catalysts.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Fuel Cell Technologies Program
Grant/Contract Number:
SC0012704
OSTI ID:
1650008
Alternate ID(s):
OSTI ID: 1690087
Report Number(s):
BNL--216276-2020-JAAM
Journal Information:
Current Opinion in Electrochemistry, Journal Name: Current Opinion in Electrochemistry Vol. 21; ISSN 2451-9103
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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