Durable hybrid electrocatalysts for proton exchange membrane fuel cells
- Hong Kong Univ. of Science and Technology, Kowloon (Hong Kong)
- Argonne National Lab. (ANL), Lemont, IL (United States)
- Argonne National Lab. (ANL), Lemont, IL (United States); Jeonbuk National Univ., Jeonju (South Korea)
- Hong Kong Univ. of Science and Technology, Guangzhou (China). Fok Ying Tung Research Inst.; Univ. of California, Irvine, CA (United States)
- Chongqing Univ. (China)
- Univ. of California, Irvine, CA (United States)
- Argonne National Lab. (ANL), Lemont, IL (United States); Stanford Univ., CA (United States); Imam Abdulrahman Bin Faisal Univ. (IAU), Dammam (Saudi Arabia)
- Hong Kong Univ. of Science and Technology, Kowloon (Hong Kong); Hong Kong Univ. of Science and Technology, Guangzhou (China). Fok Ying Tung Research Inst.; Hong Kong Univ. of Science and Technology, Kowloon (Hong Kong). Energy Inst.
The low durability of carbon-based non-precious metal electrocatalysts hinders their practical applications in proton exchange membrane fuel cells (PEMFCs). In this study, we rationally design a hybrid Pt-Fe-N-C electrocatalyst with unprecedented durability. It consists of abundant Pt and Fe single atoms homogeneously dispersed on the nitrogen-doped carbon support and a small amount of Pt-Fe alloy nanoparticles. A PEMFC with Pt-Fe-N-C as the cathode shows a larger peak power density (0.75 W cm-2) than that with Fe-N-C as the cathode (0.50 W cm-2). The remarkable durability of Pt-Fe-N-C is reflected from no noticeable drop in the half-wave potential after 70000 potential cycles between 0.6 and 1.0 V in the liquid cell, and 80% current retention after 85 h of potential hold at 0.4 V in the fuel cell. This work demonstrates the feasibility of improving the durability of Fe-N-C material via ultra-low Pt doping and makes non-precious metal electrocatalysts be close to achieving commercial metrics.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- National Key R&D Program of China; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1776817
- Alternate ID(s):
- OSTI ID: 1809801
- Journal Information:
- Nano Energy, Journal Name: Nano Energy Vol. 77; ISSN 2211-2855
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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