Nitrogen‐doped Carbon–CoO x Nanohybrids: A Precious Metal Free Cathode that Exceeds 1.0 W cm −2 Peak Power and 100 h Life in Anion‐Exchange Membrane Fuel Cells
Abstract
Abstract Efficient and durable nonprecious metal electrocatalysts for the oxygen reduction (ORR) are highly desirable for several electrochemical devices, including anion exchange membrane fuel cells (AEMFCs). Here, a 2D planar electrocatalyst with CoO x embedded in nitrogen‐doped graphitic carbon (N‐C‐CoO x ) was created through the direct pyrolysis of a metal–organic complex with a NaCl template. The N‐C‐CoO x catalyst showed high ORR activity, indicated by excellent half‐wave (0.84 V vs. RHE) and onset (1.01 V vs. RHE) potentials. This high intrinsic activity was also observed in operating AEMFCs where the kinetic current was 100 mA cm −2 at 0.85 V. When paired with a radiation‐grafted ETFE powder ionomer, the N‐C‐CoO x AEMFC cathode was able to achieve extremely high peak power density (1.05 W cm −2 ) and mass transport limited current (3 A cm −2 ) for a precious metal free electrode. The N‐C‐CoO x cathode also showed good stability over 100 hours of operation with a voltage decay of only 15 % at 600 mA cm −2 under H 2 /air (CO 2 ‐free) reacting gas feeds. The N‐C‐CoO x cathode catalyst was also paired with a very low loading PtRu/C anode catalyst, to create AEMFCs with amore »
- Authors:
-
- Department of Chemical Engineering University of South Carolina Columbia SC USA
- Department of Chemical Engineering University of South Carolina Columbia SC USA, Department of Chemical and Biomolecular Engineering University of Connecticut Storrs CT USA
- Department of Chemistry University of Surrey Guildford Surrey UK
- Publication Date:
- Research Org.:
- Univ. of Connecticut, Storrs, CT (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); National Science Foundation (NSF); Engineering and Physical Sciences Research Council (EPSRC)
- OSTI Identifier:
- 1494649
- Alternate Identifier(s):
- OSTI ID: 1483434; OSTI ID: 1611439
- Grant/Contract Number:
- SC0010531; 1803189; EP/M014371/1
- Resource Type:
- Published Article
- Journal Name:
- Angewandte Chemie (International Edition)
- Additional Journal Information:
- Journal Name: Angewandte Chemie (International Edition) Journal Volume: 58 Journal Issue: 4; Journal ID: ISSN 1433-7851
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- Germany
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; chemistry; anion-exchange membrane fuel cell; cobalt oxide; electrocatalysis; oxygen reduction reaction
Citation Formats
Peng, Xiong, Omasta, Travis J., Magliocca, Emanuele, Wang, Lianqin, Varcoe, John R., and Mustain, William E. Nitrogen‐doped Carbon–CoO x Nanohybrids: A Precious Metal Free Cathode that Exceeds 1.0 W cm −2 Peak Power and 100 h Life in Anion‐Exchange Membrane Fuel Cells. Germany: N. p., 2018.
Web. doi:10.1002/anie.201811099.
Peng, Xiong, Omasta, Travis J., Magliocca, Emanuele, Wang, Lianqin, Varcoe, John R., & Mustain, William E. Nitrogen‐doped Carbon–CoO x Nanohybrids: A Precious Metal Free Cathode that Exceeds 1.0 W cm −2 Peak Power and 100 h Life in Anion‐Exchange Membrane Fuel Cells. Germany. https://doi.org/10.1002/anie.201811099
Peng, Xiong, Omasta, Travis J., Magliocca, Emanuele, Wang, Lianqin, Varcoe, John R., and Mustain, William E. Tue .
"Nitrogen‐doped Carbon–CoO x Nanohybrids: A Precious Metal Free Cathode that Exceeds 1.0 W cm −2 Peak Power and 100 h Life in Anion‐Exchange Membrane Fuel Cells". Germany. https://doi.org/10.1002/anie.201811099.
@article{osti_1494649,
title = {Nitrogen‐doped Carbon–CoO x Nanohybrids: A Precious Metal Free Cathode that Exceeds 1.0 W cm −2 Peak Power and 100 h Life in Anion‐Exchange Membrane Fuel Cells},
author = {Peng, Xiong and Omasta, Travis J. and Magliocca, Emanuele and Wang, Lianqin and Varcoe, John R. and Mustain, William E.},
abstractNote = {Abstract Efficient and durable nonprecious metal electrocatalysts for the oxygen reduction (ORR) are highly desirable for several electrochemical devices, including anion exchange membrane fuel cells (AEMFCs). Here, a 2D planar electrocatalyst with CoO x embedded in nitrogen‐doped graphitic carbon (N‐C‐CoO x ) was created through the direct pyrolysis of a metal–organic complex with a NaCl template. The N‐C‐CoO x catalyst showed high ORR activity, indicated by excellent half‐wave (0.84 V vs. RHE) and onset (1.01 V vs. RHE) potentials. This high intrinsic activity was also observed in operating AEMFCs where the kinetic current was 100 mA cm −2 at 0.85 V. When paired with a radiation‐grafted ETFE powder ionomer, the N‐C‐CoO x AEMFC cathode was able to achieve extremely high peak power density (1.05 W cm −2 ) and mass transport limited current (3 A cm −2 ) for a precious metal free electrode. The N‐C‐CoO x cathode also showed good stability over 100 hours of operation with a voltage decay of only 15 % at 600 mA cm −2 under H 2 /air (CO 2 ‐free) reacting gas feeds. The N‐C‐CoO x cathode catalyst was also paired with a very low loading PtRu/C anode catalyst, to create AEMFCs with a total PGM loading of only 0.10 mg Pt‐Ru cm −2 capable of achieving 7.4 W mg −1 PGM as well as supporting a current of 0.7 A cm −2 at 0.6 V with H 2 /air (CO 2 free)—creating a cell that was able to meet the 2019 U.S. Department of Energy initial performance target of 0.6 V at 0.6 A cm −2 under H 2 /air with a PGM loading <0.125 mg cm −2 with AEMFCs for the first time.},
doi = {10.1002/anie.201811099},
journal = {Angewandte Chemie (International Edition)},
number = 4,
volume = 58,
place = {Germany},
year = {Tue Nov 27 00:00:00 EST 2018},
month = {Tue Nov 27 00:00:00 EST 2018}
}
https://doi.org/10.1002/anie.201811099
Web of Science
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