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Title: Platinum-Coated Nickel Nanowires as Oxygen-Reducing Electrocatalysts

Abstract

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 found 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.

Authors:
 [1];  [1];  [2];  [2];  [3];  [1];  [1];  [4]
  1. National Renewable Energy Laboratory (NREL)
  2. ORNL
  3. Colorado School of Mines, Golden
  4. Los Alamos National Laboratory (LANL)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1154795
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
ACS Catalysis
Additional Journal Information:
Journal Volume: 4; Journal Issue: 4; Journal ID: ISSN 2155--5435
Country of Publication:
United States
Language:
English

Citation Formats

Alia, Shaun M, Larsen, Brian A, Pylypenko, Svitlana, Cullen, David A, Diercks, David R, Neyerlin, Kenneth C, Kocha, Shyam S, and Pivovar, Bryan. Platinum-Coated Nickel Nanowires as Oxygen-Reducing Electrocatalysts. United States: N. p., 2014. Web. doi:10.1021/cs401081w.
Alia, Shaun M, Larsen, Brian A, Pylypenko, Svitlana, Cullen, David A, Diercks, David R, Neyerlin, Kenneth C, Kocha, Shyam S, & Pivovar, Bryan. Platinum-Coated Nickel Nanowires as Oxygen-Reducing Electrocatalysts. United States. https://doi.org/10.1021/cs401081w
Alia, Shaun M, Larsen, Brian A, Pylypenko, Svitlana, Cullen, David A, Diercks, David R, Neyerlin, Kenneth C, Kocha, Shyam S, and Pivovar, Bryan. 2014. "Platinum-Coated Nickel Nanowires as Oxygen-Reducing Electrocatalysts". United States. https://doi.org/10.1021/cs401081w.
@article{osti_1154795,
title = {Platinum-Coated Nickel Nanowires as Oxygen-Reducing Electrocatalysts},
author = {Alia, Shaun M and Larsen, Brian A and Pylypenko, Svitlana and Cullen, David A and Diercks, David R and Neyerlin, Kenneth C and Kocha, Shyam S and Pivovar, Bryan},
abstractNote = {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 found 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.},
doi = {10.1021/cs401081w},
url = {https://www.osti.gov/biblio/1154795}, journal = {ACS Catalysis},
issn = {2155--5435},
number = 4,
volume = 4,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 2014},
month = {Wed Jan 01 00:00:00 EST 2014}
}