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Title: Ultralow-loading platinum-cobalt fuel cell catalysts derived from imidazolate frameworks

Abstract

Achieving high catalytic performance with the lowest possible amount of platinum is critical for fuel cell cost reduction. Here we describe a method of preparing highly active yet stable electrocatalysts containing ultralow-loading platinum content by using cobalt or bimetallic cobalt and zinc zeolitic imidazolate frameworks as precursors. Synergistic catalysis between strained platinum-cobalt core-shell nanoparticles over a platinum-group metal (PGM)–free catalytic substrate led to excellent fuel cell performance under 1 atmosphere of O 2 or air at both high-voltage and high-current domains. Two catalysts achieved oxygen reduction reaction (ORR) mass activities of 1.08 amperes per milligram of platinum (A mg Pt −1 ) and 1.77 A mg Pt −1 and retained 64% and 15% of initial values after 30,000 voltage cycles in a fuel cell. Computational modeling reveals that the interaction between platinum-cobalt nanoparticles and PGM-free sites improves ORR activity and durability.

Authors:
ORCiD logo; ORCiD logo; ; ORCiD logo; ; ; ORCiD logo; ; ; ORCiD logo
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Fuel Cell Technologies Office (EE-3F); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division; USDOE Office of Science (SC), Workforce Development for Teachers and Scientists (WDTS) (SC-27)
OSTI Identifier:
1485751
Alternate Identifier(s):
OSTI ID: 1493886
Grant/Contract Number:  
AC02-06CH11357; AC02-05CH11231; SC0010379; SC0014664
Resource Type:
Published Article
Journal Name:
Science
Additional Journal Information:
Journal Name: Science Journal Volume: 362 Journal Issue: 6420; Journal ID: ISSN 0036-8075
Publisher:
American Association for the Advancement of Science (AAAS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; fuel cell; catalyst; platinum; ultralow; PGM-free

Citation Formats

Chong, Lina, Wen, Jianguo, Kubal, Joseph, Sen, Fatih G., Zou, Jianxin, Greeley, Jeffery, Chan, Maria, Barkholtz, Heather, Ding, Wenjiang, and Liu, Di-Jia. Ultralow-loading platinum-cobalt fuel cell catalysts derived from imidazolate frameworks. United States: N. p., 2018. Web. doi:10.1126/science.aau0630.
Chong, Lina, Wen, Jianguo, Kubal, Joseph, Sen, Fatih G., Zou, Jianxin, Greeley, Jeffery, Chan, Maria, Barkholtz, Heather, Ding, Wenjiang, & Liu, Di-Jia. Ultralow-loading platinum-cobalt fuel cell catalysts derived from imidazolate frameworks. United States. doi:10.1126/science.aau0630.
Chong, Lina, Wen, Jianguo, Kubal, Joseph, Sen, Fatih G., Zou, Jianxin, Greeley, Jeffery, Chan, Maria, Barkholtz, Heather, Ding, Wenjiang, and Liu, Di-Jia. Thu . "Ultralow-loading platinum-cobalt fuel cell catalysts derived from imidazolate frameworks". United States. doi:10.1126/science.aau0630.
@article{osti_1485751,
title = {Ultralow-loading platinum-cobalt fuel cell catalysts derived from imidazolate frameworks},
author = {Chong, Lina and Wen, Jianguo and Kubal, Joseph and Sen, Fatih G. and Zou, Jianxin and Greeley, Jeffery and Chan, Maria and Barkholtz, Heather and Ding, Wenjiang and Liu, Di-Jia},
abstractNote = {Achieving high catalytic performance with the lowest possible amount of platinum is critical for fuel cell cost reduction. Here we describe a method of preparing highly active yet stable electrocatalysts containing ultralow-loading platinum content by using cobalt or bimetallic cobalt and zinc zeolitic imidazolate frameworks as precursors. Synergistic catalysis between strained platinum-cobalt core-shell nanoparticles over a platinum-group metal (PGM)–free catalytic substrate led to excellent fuel cell performance under 1 atmosphere of O 2 or air at both high-voltage and high-current domains. Two catalysts achieved oxygen reduction reaction (ORR) mass activities of 1.08 amperes per milligram of platinum (A mg Pt −1 ) and 1.77 A mg Pt −1 and retained 64% and 15% of initial values after 30,000 voltage cycles in a fuel cell. Computational modeling reveals that the interaction between platinum-cobalt nanoparticles and PGM-free sites improves ORR activity and durability.},
doi = {10.1126/science.aau0630},
journal = {Science},
number = 6420,
volume = 362,
place = {United States},
year = {2018},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1126/science.aau0630

Citation Metrics:
Cited by: 60 works
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    Works referencing / citing this record:

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