Atomically dispersed iron sites with a nitrogen–carbon coating as highly active and durable oxygen reduction catalysts for fuel cells
Abstract
Nitrogen-coordinated single atom iron sites (FeN4) embedded in carbon (Fe–N–C) are the most active platinum group metal-free oxygen reduction catalysts for proton-exchange membrane fuel cells. Still, current Fe–N–C catalysts lack sufficient long-term durability and are not yet viable for practical applications. Here we report a highly durable and active Fe–N–C catalyst synthesized using heat treatment with ammonia chloride followed by high-temperature deposition of a thin layer of nitrogen-doped carbon on the catalyst surface. We propose that catalyst stability is improved by converting defect-rich pyrrolic N-coordinated FeN4 sites into highly stable pyridinic N-coordinated FeN4 sites. The stability enhancement is demonstrated in membrane electrode assemblies using accelerated stress testing and a long-term steady-state test (>300 h at 0.67 V), approaching a typical Pt/C cathode (0.1 mgPt cm-2). The encouraging stability improvement represents a critical step in developing viable Fe–N–C catalysts to overcome the cost barriers of hydrogen fuel cells for numerous applications.
- Authors:
-
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- State Univ. of New York (SUNY), Buffalo, NY (United States)
- Indiana Univ.-Purdue Univ. Indianapolis (IUPUI), Indianapolis, IN (United States); Purdue Univ., West Lafayette, IN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Univ. of Pittsburgh, PA (United States)
- Oregon State Univ., Corvallis, OR (United States)
- Carnegie Mellon Univ., Pittsburgh, PA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Argonne National Lab. (ANL), Lemont, IL (United States)
- Argonne National Lab. (ANL), Lemont, IL (United States). Advanced Photon Source (APS)
- Indiana Univ.-Purdue Univ. Indianapolis (IUPUI), Indianapolis, IN (United States)
- Giner, Inc., Newton, MA (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS); Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Univ. at Buffalo, NY (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Nuclear Energy (NE), Nuclear Fuel Cycle and Supply Chain. Fuel Cycle Research and Development Program; National Science Foundation (NSF); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Fuel Cell Technologies Office; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Hydrogen Fuel Cell Technologies Office (HFTO); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
- OSTI Identifier:
- 1881116
- Alternate Identifier(s):
- OSTI ID: 1897111; OSTI ID: 1969732
- Grant/Contract Number:
- AC05-00OR22725; EE0008076; EE0008417; AC02-06CH11357; CBET-1604392; 1804326; CBET-1949870; 2016192
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Energy
- Additional Journal Information:
- Journal Volume: 7; Journal Issue: 7; Journal ID: ISSN 2058-7546
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; electrocatalysis; fuel cells; hydrogen energy; 08 HYDROGEN
Citation Formats
Liu, Shengwen, Li, Chenzhao, Zachman, Michael J., Zeng, Yachao, Yu, Haoran, Li, Boyang, Wang, Maoyu, Braaten, Jonathan, Liu, Jiawei, Meyer, III, Harry M., Lucero, Marcos, Kropf, A. Jeremy, Alp, E. Ercan, Gong, Qing, Shi, Qiurong, Feng, Zhenxing, Xu, Hui, Wang, Guofeng, Myers, Deborah J., Xie, Jian, Cullen, David A., Litster, Shawn, and Wu, Gang. Atomically dispersed iron sites with a nitrogen–carbon coating as highly active and durable oxygen reduction catalysts for fuel cells. United States: N. p., 2022.
Web. doi:10.1038/s41560-022-01062-1.
Liu, Shengwen, Li, Chenzhao, Zachman, Michael J., Zeng, Yachao, Yu, Haoran, Li, Boyang, Wang, Maoyu, Braaten, Jonathan, Liu, Jiawei, Meyer, III, Harry M., Lucero, Marcos, Kropf, A. Jeremy, Alp, E. Ercan, Gong, Qing, Shi, Qiurong, Feng, Zhenxing, Xu, Hui, Wang, Guofeng, Myers, Deborah J., Xie, Jian, Cullen, David A., Litster, Shawn, & Wu, Gang. Atomically dispersed iron sites with a nitrogen–carbon coating as highly active and durable oxygen reduction catalysts for fuel cells. United States. https://doi.org/10.1038/s41560-022-01062-1
Liu, Shengwen, Li, Chenzhao, Zachman, Michael J., Zeng, Yachao, Yu, Haoran, Li, Boyang, Wang, Maoyu, Braaten, Jonathan, Liu, Jiawei, Meyer, III, Harry M., Lucero, Marcos, Kropf, A. Jeremy, Alp, E. Ercan, Gong, Qing, Shi, Qiurong, Feng, Zhenxing, Xu, Hui, Wang, Guofeng, Myers, Deborah J., Xie, Jian, Cullen, David A., Litster, Shawn, and Wu, Gang. Thu .
"Atomically dispersed iron sites with a nitrogen–carbon coating as highly active and durable oxygen reduction catalysts for fuel cells". United States. https://doi.org/10.1038/s41560-022-01062-1. https://www.osti.gov/servlets/purl/1881116.
@article{osti_1881116,
title = {Atomically dispersed iron sites with a nitrogen–carbon coating as highly active and durable oxygen reduction catalysts for fuel cells},
author = {Liu, Shengwen and Li, Chenzhao and Zachman, Michael J. and Zeng, Yachao and Yu, Haoran and Li, Boyang and Wang, Maoyu and Braaten, Jonathan and Liu, Jiawei and Meyer, III, Harry M. and Lucero, Marcos and Kropf, A. Jeremy and Alp, E. Ercan and Gong, Qing and Shi, Qiurong and Feng, Zhenxing and Xu, Hui and Wang, Guofeng and Myers, Deborah J. and Xie, Jian and Cullen, David A. and Litster, Shawn and Wu, Gang},
abstractNote = {Nitrogen-coordinated single atom iron sites (FeN4) embedded in carbon (Fe–N–C) are the most active platinum group metal-free oxygen reduction catalysts for proton-exchange membrane fuel cells. Still, current Fe–N–C catalysts lack sufficient long-term durability and are not yet viable for practical applications. Here we report a highly durable and active Fe–N–C catalyst synthesized using heat treatment with ammonia chloride followed by high-temperature deposition of a thin layer of nitrogen-doped carbon on the catalyst surface. We propose that catalyst stability is improved by converting defect-rich pyrrolic N-coordinated FeN4 sites into highly stable pyridinic N-coordinated FeN4 sites. The stability enhancement is demonstrated in membrane electrode assemblies using accelerated stress testing and a long-term steady-state test (>300 h at 0.67 V), approaching a typical Pt/C cathode (0.1 mgPt cm-2). The encouraging stability improvement represents a critical step in developing viable Fe–N–C catalysts to overcome the cost barriers of hydrogen fuel cells for numerous applications.},
doi = {10.1038/s41560-022-01062-1},
journal = {Nature Energy},
number = 7,
volume = 7,
place = {United States},
year = {Thu Jul 07 00:00:00 EDT 2022},
month = {Thu Jul 07 00:00:00 EDT 2022}
}
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