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Title: High-Loading Intermetallic Pt 3Co/C Core–Shell Nanoparticles as Enhanced Activity Electrocatalysts toward the Oxygen Reduction Reaction (ORR)

Abstract

A facile, seed-mediated growth method and postannealing treatment have been employed to synthesize a single-phase 40% mass loading intermetallic Pt 3Co/Vulcan electrocatalyst, enabling the electrocatalytic layer to be thinner and thus lowering the mass transport resistance for the ORR in proton exchange membrane fuel cells (PEMFCs). These 40% Pt 3Co/C nanocatalysts exhibited superior kinetics toward the ORR, relative to a 20% Pt 3Co/C catalyst, and only showed a slight degradation in the half-wave potential and electrochemical surface area after a 4000-cycle stability test. The high activity and stability are attributed to a stable intermetallic Pt3Co core with a Pt shell two to three atomic layers thick, as well as to its good dispersion on the support. This seed-mediated growth approach and postannealing treatment provide a new strategy to ensure single-phase formation and uniform particle size distribution for other high-mass-loading binary intermetallic/alloy electrocatalyst systems and can contribute to the practical commercialization of PEMFCs, especially in high-current-density applications, such as automotive

Authors:
 [1];  [2]; ORCiD logo [1];  [1]; ORCiD logo [1]
  1. Cornell Univ., Ithaca, NY (United States). Dept. of Chemistry and Chemical Biology
  2. Wuhan Univ. (China). College of Chemistry and Molecular Sciences, Hubei Key Lab. of Electrochemical Power Sources
Publication Date:
Research Org.:
General Motors LLC, Pontiac, MI (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Fuel Cell Technologies Office (EE-3F)
OSTI Identifier:
1504247
Grant/Contract Number:  
EE0007271
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Chemistry of Materials
Additional Journal Information:
Journal Volume: 30; Journal Issue: 5; Journal ID: ISSN 0897-4756
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE

Citation Formats

Xiong, Yin, Xiao, Li, Yang, Yao, DiSalvo, Francis J., and Abruña, Héctor D. High-Loading Intermetallic Pt3Co/C Core–Shell Nanoparticles as Enhanced Activity Electrocatalysts toward the Oxygen Reduction Reaction (ORR). United States: N. p., 2018. Web. doi:10.1021/acs.chemmater.7b04201.
Xiong, Yin, Xiao, Li, Yang, Yao, DiSalvo, Francis J., & Abruña, Héctor D. High-Loading Intermetallic Pt3Co/C Core–Shell Nanoparticles as Enhanced Activity Electrocatalysts toward the Oxygen Reduction Reaction (ORR). United States. doi:10.1021/acs.chemmater.7b04201.
Xiong, Yin, Xiao, Li, Yang, Yao, DiSalvo, Francis J., and Abruña, Héctor D. Mon . "High-Loading Intermetallic Pt3Co/C Core–Shell Nanoparticles as Enhanced Activity Electrocatalysts toward the Oxygen Reduction Reaction (ORR)". United States. doi:10.1021/acs.chemmater.7b04201. https://www.osti.gov/servlets/purl/1504247.
@article{osti_1504247,
title = {High-Loading Intermetallic Pt3Co/C Core–Shell Nanoparticles as Enhanced Activity Electrocatalysts toward the Oxygen Reduction Reaction (ORR)},
author = {Xiong, Yin and Xiao, Li and Yang, Yao and DiSalvo, Francis J. and Abruña, Héctor D.},
abstractNote = {A facile, seed-mediated growth method and postannealing treatment have been employed to synthesize a single-phase 40% mass loading intermetallic Pt3Co/Vulcan electrocatalyst, enabling the electrocatalytic layer to be thinner and thus lowering the mass transport resistance for the ORR in proton exchange membrane fuel cells (PEMFCs). These 40% Pt3Co/C nanocatalysts exhibited superior kinetics toward the ORR, relative to a 20% Pt3Co/C catalyst, and only showed a slight degradation in the half-wave potential and electrochemical surface area after a 4000-cycle stability test. The high activity and stability are attributed to a stable intermetallic Pt3Co core with a Pt shell two to three atomic layers thick, as well as to its good dispersion on the support. This seed-mediated growth approach and postannealing treatment provide a new strategy to ensure single-phase formation and uniform particle size distribution for other high-mass-loading binary intermetallic/alloy electrocatalyst systems and can contribute to the practical commercialization of PEMFCs, especially in high-current-density applications, such as automotive},
doi = {10.1021/acs.chemmater.7b04201},
journal = {Chemistry of Materials},
issn = {0897-4756},
number = 5,
volume = 30,
place = {United States},
year = {2018},
month = {2}
}

Journal Article:
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