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Title: Platinum-Coated Cobalt Nanowires as Oxygen Reduction Reaction Electrocatalysts

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Fuel Cell Technologies Office (EE-3F)
OSTI Identifier:
1150175
DOE Contract Number:
AC36-08GO28308
Resource Type:
Journal Article
Resource Relation:
Journal Name: ACS Catalysis; Journal Volume: 4; Journal Issue: 8, 1 August 2014
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 33 ADVANCED PROPULSION SYSTEMS; Chemical and Material Sciences

Citation Formats

Alia, S. M., Pylypenko, S., Neyerlin, K. C., Cullen, D. A., Kocha, S. S., and Pivovar, B. S. Platinum-Coated Cobalt Nanowires as Oxygen Reduction Reaction Electrocatalysts. United States: N. p., 2014. Web. doi:10.1021/cs500370q.
Alia, S. M., Pylypenko, S., Neyerlin, K. C., Cullen, D. A., Kocha, S. S., & Pivovar, B. S. Platinum-Coated Cobalt Nanowires as Oxygen Reduction Reaction Electrocatalysts. United States. doi:10.1021/cs500370q.
Alia, S. M., Pylypenko, S., Neyerlin, K. C., Cullen, D. A., Kocha, S. S., and Pivovar, B. S. Fri . "Platinum-Coated Cobalt Nanowires as Oxygen Reduction Reaction Electrocatalysts". United States. doi:10.1021/cs500370q.
@article{osti_1150175,
title = {Platinum-Coated Cobalt Nanowires as Oxygen Reduction Reaction Electrocatalysts},
author = {Alia, S. M. and Pylypenko, S. and Neyerlin, K. C. and Cullen, D. A. and Kocha, S. S. and Pivovar, B. S.},
abstractNote = {},
doi = {10.1021/cs500370q},
journal = {ACS Catalysis},
number = 8, 1 August 2014,
volume = 4,
place = {United States},
year = {Fri Aug 01 00:00:00 EDT 2014},
month = {Fri Aug 01 00:00:00 EDT 2014}
}
  • Cobalt nanowires (CoNWs) are coated with platinum (Pt) by partial galvanic displacement, forming core/shell wires 200 300 nm in diameter and 100 200 1m in length. PtCoNWs are characterized for activit y in the oxygen reduction reaction (ORR) with rotating disk electrode half5cells in 0.1 M perchloric acid electrolytes. The resulting catalysts demonstrate ORR specific activi ties in the range 2053 2783 1A cm Pt 2 , comparable to the specific activity of polycrystalline Pt. The specific activi ties of PtCoNWs increase with decreasing Pt content and exhibit a corresponding increase in Pt lattice compression. P tCoNWs have exhibited amore » maximum mass activity of 79 3 mA mg Pt 1 , 2.6 times greater than carbon5supported Pt nanopart icles.« less
  • Platinum (Pt)-coated nickel (Ni) nanowires (PtNiNWs) are synthesized by the partial spontaneous galvanic displacement of NiNWs, with a diameter of 150 250 nm and a length of 100 200 m. PtNiNWs are electrochemically characterized for oxygen reduction (ORR) in rotating disk electrode half-cells with an acidic electrolyte and compared to carbon-supported Pt (Pt/HSC) and a polycrystalline Pt electrode. Like other extended surface catalysts, the nanowire morphology yields significant gains in ORR specific activity compared to Pt/HSC. Unlike other extended surface approaches, the resultant materials have yielded exceptionally high surface areas, greater than 90 m2 gPt 1. These studies have foundmore » that reducing the level of Pt displacement increases Pt surface area and ORR mass activity. PtNiNWs produce a peak mass activity of 917 mA mgPt 1, 3.0 times greater than Pt/HSC and 2.1 times greater than the U.S. Department of Energy target for proton-exchange membrane fuel cell activity.« less