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Durable hybrid electrocatalysts for proton exchange membrane fuel cells

Journal Article · · Nano Energy
 [1];  [2];  [2];  [3];  [4];  [1];  [5];  [6];  [7];  [8]
  1. Hong Kong Univ. of Science and Technology, Kowloon (Hong Kong)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
  3. Argonne National Lab. (ANL), Lemont, IL (United States); Jeonbuk National Univ., Jeonju (South Korea)
  4. Hong Kong Univ. of Science and Technology, Guangzhou (China). Fok Ying Tung Research Inst.; Univ. of California, Irvine, CA (United States)
  5. Chongqing Univ. (China)
  6. Univ. of California, Irvine, CA (United States)
  7. Argonne National Lab. (ANL), Lemont, IL (United States); Stanford Univ., CA (United States); Imam Abdulrahman Bin Faisal Univ. (IAU), Dammam (Saudi Arabia)
  8. 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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