skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Hard-Magnet L10-CoPt Nanoparticles Advance Fuel Cell Catalysis

Journal Article · · Joule
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;

Stabilizing transition metals (M) in MPt alloy under acidic conditions is challenging, yet crucial to boost Pt catalysis toward oxygen reduction reaction (ORR). We synthesized ~9 nm hard-magnet core/shell L10-CoPt/Pt nanoparticles with 2–3 atomic layers of strained Pt shell for ORR. At 60°C in acid, the hard-magnet L10-CoPt better stabilizes Co (5% loss after 24 hr) than soft-magnet A1-CoPt (34% loss in 7 hr). L10-CoPt/Pt achieves mass activities (MA) of 0.56 A/mgPt initially and 0.45 A/mgPt after 30,000 voltage cycles in the membrane electrode assembly at 80°C, exceeding the DOE 2020 targets on Pt activity and durability (0.44 A/mgPt in MA and <40% loss in MA after 30,000 cycles). Lastly, density functional theory calculations suggest that the ligand effect of Co and the biaxial strain (-4.50%/-4.25%) of the Pt shell weaken the binding of oxygenated species, leading to enhanced ORR performance in fuel cells.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Hydrogen Fuel Cell Technologies Office; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC52-06NA25396; AC02-06CH11357; 89233218CNA000001; AC05-00OR22725
OSTI ID:
1591934
Alternate ID(s):
OSTI ID: 1494465; OSTI ID: 1531228
Report Number(s):
LA-UR-18-28949; S2542435118304549; PII: S2542435118304549
Journal Information:
Joule, Journal Name: Joule Vol. 3 Journal Issue: 1; ISSN 2542-4351
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 206 works
Citation information provided by
Web of Science

Cited By (12)

Achievements, challenges and perspectives on cathode catalysts in proton exchange membrane fuel cells for transportation journal July 2019
Sub‐3 nm Intermetallic Ordered Pt 3 In Clusters for Oxygen Reduction Reaction journal November 2019
Sub‐6 nm Fully Ordered L 1 0 ‐Pt–Ni–Co Nanoparticles Enhance Oxygen Reduction via Co Doping Induced Ferromagnetism Enhancement and Optimized Surface Strain journal March 2019
Tungsten‐Doped L1 0 ‐PtCo Ultrasmall Nanoparticles as a High‐Performance Fuel Cell Cathode journal September 2019
Tungsten‐Doped L1 0 ‐PtCo Ultrasmall Nanoparticles as a High‐Performance Fuel Cell Cathode journal October 2019
Chemical Synthesis of Magnetic Nanoparticles for Permanent Magnet Applications journal October 2019
Hollow PtFe Alloy Nanoparticles Derived from Pt‐Fe 3 O 4 Dimers through a Silica‐Protection Reduction Strategy as Efficient Oxygen Reduction Electrocatalysts journal January 2020
Shape Control of Monodispersed Sub‐5 nm Pd Tetrahedrons and Laciniate Pd Nanourchins by Maneuvering the Dispersed State of Additives for Boosting ORR Performance journal January 2020
Optimizing PtFe intermetallics for oxygen reduction reaction: from DFT screening to in situ XAFS characterization journal January 2019
Monodisperse nanoparticles for catalysis and nanomedicine journal January 2019
Synthesis of PtCoNiRu/C nanoparticles by spray drying combined with reduction sintering for methanol electro-oxidation journal January 2020
Highly stable Pt 3 Ni nanowires tailored with trace Au for the oxygen reduction reaction journal January 2019

Figures / Tables (5)

Figure 1(p. 3)figure Figure 1
Figure 2(p. 3)figure Figure 2
Figure 3(p. 4)figure Figure 3
Figure 4(p. 5)figure Figure 4
Figure 5(p. 6)figure Figure 5

Similar Records

Regulating Catalytic Properties and Thermal Stability of Pt and PtCo Intermetallic Fuel-Cell Catalysts via Strong Coupling Effects between Single-Metal Site-Rich Carbon and Pt
Journal Article · Fri Aug 04 00:00:00 EDT 2023 · Journal of the American Chemical Society · OSTI ID:1591934
+14 more
Biaxial Strains Mediated Oxygen Reduction Electrocatalysis on Fenton Reaction Resistant L1 0 ‐PtZn Fuel Cell Cathode
Journal Article · Fri Jun 05 00:00:00 EDT 2020 · Advanced Energy Materials · OSTI ID:1591934
+10 more
Face-centered tetragonal (FCT) Fe and Co alloys of Pt as catalysts for the oxygen reduction reaction (ORR): A DFT study
Journal Article · Thu Nov 08 00:00:00 EST 2018 · Journal of Chemical Physics · OSTI ID:1591934

Related Subjects

25 ENERGY STORAGE
Energy Sciences