.png){kind=icon}
.png){kind=icon}
Return
Sparsely Dispersed CeOx-Stabilized Pt Nanoparticles Overcome Pt Loading–Durability Trade-Off for Highly Durable Heavy-Duty Fuel Cells
.png){kind=icon}
PRE
AI
DOI：10.1021/jacs.5c21294.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Proton-exchange-membrane fuel cells (PEMFCs) are clean and sustainable mobile power sources for transportation. Recently, their deployment in heavy-duty vehicles (HDVs) has attracted growing interest owing to their high energy scalability and lower infrastructure requirements. However, to meet the stringent requirements for efficiency and long-term durability for HDV applications, PEMFCs typically employ a relatively high platinum group metal (PGM) loading (>0.2 mgPGM/cm2). This elevated PGM loading significantly increases the stack and system costs, surpassing the U.S. Department of Energy (DOE) target of $60/kW for commercial viability. Reducing PGM loading while maintaining performance and durability remains a central challenge for HDV fuel cells. Here we exploit metal oxide–Pt interactions and utilize the strong CeOx–Pt interaction to design a CeOx@Pt catalyst structure with exceptional durability. At a low total PGM loading (0.1 mgPGM/cm2), the CeOx@Pt/C catalyst demonstrates high fuel cell performance (8.8 kW/gPGM) and stability (power retention >90%) after the challenging HDV durability testing (90,000 accelerated-stress-test cycles). With the CeOx@Pt/C catalyst, we showcase over 70% reduction in Pt cost from the M2FCT target (to $9/kW), highlighting its promising potential for enabling stable and cost-effective fuel cell systems for heavy-duty applications.
Keywords:
CeOx@Pt catalyst
proton-exchange-membrane fuel cells
platinum group metal loading
heavy-duty vehicles
durability
Journal
IF:
15.6
Papers:
20.0W
Citations:
60.2W
Organization
View more organizations