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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. In this paper, 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 2or 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 -1and retained 64% and 15% of initial values after 30,000 voltage cycles in a fuel cell. Lastly, computational modeling reveals that the interaction between platinum-cobalt nanoparticles and PGM-free sites improves ORR activity and durability.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [2]; ORCiD logo [1];  [3];  [4]; ORCiD logo [1];  [1];  [5]; ORCiD logo [1]
  1. Argonne National Lab. (ANL), Lemont, IL (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States); Purdue Univ., West Lafayette, IN (United States)
  3. Shanghai Jiao Tong University, Shanghai (China)
  4. Purdue Univ., West Lafayette, IN (United States)
  5. Shanghai Jiao Tong University (China)
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:
1493886
Grant/Contract Number:  
AC02-06CH11357; SC0010379; SC0014664; AC02-05CH11231
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Science
Additional Journal Information:
Journal Volume: 362; Journal Issue: 6420; Journal ID: ISSN 0036-8075
Publisher:
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_1493886,
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. In this paper, 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 O2or 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 mgPt-1) and 1.77 A mgPt-1and retained 64% and 15% of initial values after 30,000 voltage cycles in a fuel cell. Lastly, 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 = {Thu Nov 08 00:00:00 EST 2018},
month = {Thu Nov 08 00:00:00 EST 2018}
}

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