Synthesis of Chemically Ordered Pt3Fe/C Intermetallic Electrocatalysts for Oxygen Reduction Reaction with Enhanced Activity and Durability via a Removable Carbon Coating
Abstract
Recently, Pt 3 M (M = Fe, Ni, Co, Cu, etc.) intermetallic compounds have been highlighted as promising candidates for oxygen reduction reaction (ORR) catalysts. In general, to form those intermetallic compounds, alloy phase nanoparticles are synthesized and then heat-treated at a high temperature. However, nanoparticles easily agglomerate during the heat treatment, resulting in a decrease in electrochemical surface area (ECSA). In this study, we synthesized Pt-Fe alloy nanoparticles and employed carbon coating to protect the nanoparticles from agglomeration during heat treatment. As a result, Pt 3 Fe L1 2 structure was obtained without agglomeration of the nanoparticles; the ECSA of Pt-Fe alloy and intermetallic Pt 3 Fe/C was 37.6 and 33.3 m 2 g Pt -1 , respectively. Pt 3 Fe/C exhibited excellent mass activity (0.454 A mg Pt -1 ) and stability with superior resistances to nanoparticle agglomeration and iron leaching. Density functional theory (DFT) calculation revealed that, owing to the higher dissolution potential of Fe atoms on the Pt 3 Fe surface than those on the Pt-Fe alloy, Pt 3 Fe/C had better stability than Pt-Fe/C. A single cell fabricated with Pt 3 Fe/C showed higher initial performance and superior durability, compared to that with commercial Pt/C. We suggest that Pt 3 M chemically ordered electrocatalysts are excellent candidates that may become the most active and durable ORR catalysts available.
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The presence of four characteristic diffraction peaks marked with purple diamonds indicates the formation of an ordered L12 structure.
“In addition, the presence of four characteristic diffraction peaks marked with purple diamonds indicates the formation of an ordered L12 structure (Fig. 2 and S11a).29,30,40–44”
From Tuning the local environment of atomic Pt shells of Pt <sub>3</sub> Fe@Pt nanoparticles enables energy-saving hydrogen production (2026) · cites this paper as [43]
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Li, S., Xu, Q., Sun, B., Liu, X., Tian, H., Wang, X., & Xia, H. (2026) · Journal of Materials Chemistry A · doi:10.1039/d6ta01696k
- Authors
- Jung, C., Lee, C., Bang, K., Lim, J., Lee, H., Ryu, H. J., Cho, E., & Lee, H. M.
- Affiliations
- Korea Advanced Institute of Science and Technology (KR)
- Corresponding author
- Cho, EunAe
- Lee, Hyuck Mo
- Venue
- ACS Applied Materials & Interfaces
- Publisher
- American Chemical Society (ACS)
- Published
- 2017-09-08
- Volume
- 9
- Issue
- 37
- Pages
- 31806-31815
- ISSN
- 1944-8244 (ISSN-L)
- 1944-8252
- OpenAlex
- W2753441049
- Cited by
- 103
- References
- 4
- Citations by year
- 2026: 6 · 2025: 7 · 2024: 8 · 2023: 15 · 2022: 15 · 2021: 21 · 2020: 13 · 2019: 12 · 2018: 6
- FWCI
- 2.27
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- ACS Applied Materials & Interfaces (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Research Foundation of Korea (NRF-2015R1A5A1037627)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Physical Sciences › Materials Science › Materials Chemistry › Catalytic Processes in Materials Science
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Fuel Cells and Related Materials
- Keywords
- oxygen reduction reaction, carbon coating, nanoparticle agglomeration, heat treatment, electrocatalyst durability, iron leaching, electrochemically active surface area, mass activity, L12 structure, single cell fuel cell, Pt/C comparison
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