Platinum-Coated Palladium Nanotubes as Oxygen Reduction Reaction Electrocatalysts

Shaun M. Alia; Kurt O. Jensen; Bryan S. Pivovar; Yushan Yan

doi:10.1021/cs200682c

Platinum-Coated Palladium Nanotubes as Oxygen Reduction Reaction Electrocatalysts

Shaun M. Alia, Kurt O. Jensen, Bryan S. Pivovar, Yushan Yan

Chemistry and Nanoscience

Research output: Contribution to journal › Article › peer-review

99 Scopus Citations

Abstract

Platinum (Pt) coated palladium (Pd) nanotubes (Pt/PdNTs) with a wall thickness of 6 nm, outer diameter of 60 nm, and length of 5-20 μm are synthesized via the partial galvanic displacement of Pd nanotubes. Pt coatings are controlled to a loading of 9 (PtPd 9), 14 (PtPd 14), and 18 (PtPd 18) wt % and estimated to have a thickness of 1.1, 1.7, and 2.2 Pt atoms, respectively, if a uniform and continuous coating is assumed. Oxygen reduction experiments have been used to evaluate Pt/PdNTs, Pt nanotubes, Pd nanotubes, and supported Pt nanoparticle activity for proton exchange membrane fuel cell cathodes. The dollar and area (specific surface area) normalized ORR activities of Pt/PdNTs exceed the United States Department of Energy (DOE) targets. PtPd 9, PtPd 14, and PtPd 18 produce dollar activities of 10.4, 9.4, and 8.7 A$ ^-1, respectively; PtPd 9 exceeds the DOE dollar activity target (9.7 A$ ^-1) by 7%. Pt/PdNTs further exceed the DOE area activity target by 40-43%.

Original language	American English
Pages (from-to)	858-863
Number of pages	6
Journal	ACS Catalysis
Volume	2
Issue number	5
DOIs	https://doi.org/10.1021/cs200682c https://doi.org/10.1021/cs200682c
State	Published - 4 May 2012

NREL Publication Number

NREL/JA-5600-55667

Keywords

core shell catalysts
platinum nanotubes
proton exchange membrane fuel cells

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title = "Platinum-Coated Palladium Nanotubes as Oxygen Reduction Reaction Electrocatalysts",

abstract = "Platinum (Pt) coated palladium (Pd) nanotubes (Pt/PdNTs) with a wall thickness of 6 nm, outer diameter of 60 nm, and length of 5-20 μm are synthesized via the partial galvanic displacement of Pd nanotubes. Pt coatings are controlled to a loading of 9 (PtPd 9), 14 (PtPd 14), and 18 (PtPd 18) wt % and estimated to have a thickness of 1.1, 1.7, and 2.2 Pt atoms, respectively, if a uniform and continuous coating is assumed. Oxygen reduction experiments have been used to evaluate Pt/PdNTs, Pt nanotubes, Pd nanotubes, and supported Pt nanoparticle activity for proton exchange membrane fuel cell cathodes. The dollar and area (specific surface area) normalized ORR activities of Pt/PdNTs exceed the United States Department of Energy (DOE) targets. PtPd 9, PtPd 14, and PtPd 18 produce dollar activities of 10.4, 9.4, and 8.7 A$ -1, respectively; PtPd 9 exceeds the DOE dollar activity target (9.7 A$ -1) by 7%. Pt/PdNTs further exceed the DOE area activity target by 40-43%.",

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AU - Alia, Shaun M.

AU - Jensen, Kurt O.

AU - Pivovar, Bryan S.

AU - Yan, Yushan

PY - 2012/5/4

Y1 - 2012/5/4

N2 - Platinum (Pt) coated palladium (Pd) nanotubes (Pt/PdNTs) with a wall thickness of 6 nm, outer diameter of 60 nm, and length of 5-20 μm are synthesized via the partial galvanic displacement of Pd nanotubes. Pt coatings are controlled to a loading of 9 (PtPd 9), 14 (PtPd 14), and 18 (PtPd 18) wt % and estimated to have a thickness of 1.1, 1.7, and 2.2 Pt atoms, respectively, if a uniform and continuous coating is assumed. Oxygen reduction experiments have been used to evaluate Pt/PdNTs, Pt nanotubes, Pd nanotubes, and supported Pt nanoparticle activity for proton exchange membrane fuel cell cathodes. The dollar and area (specific surface area) normalized ORR activities of Pt/PdNTs exceed the United States Department of Energy (DOE) targets. PtPd 9, PtPd 14, and PtPd 18 produce dollar activities of 10.4, 9.4, and 8.7 A$ -1, respectively; PtPd 9 exceeds the DOE dollar activity target (9.7 A$ -1) by 7%. Pt/PdNTs further exceed the DOE area activity target by 40-43%.

AB - Platinum (Pt) coated palladium (Pd) nanotubes (Pt/PdNTs) with a wall thickness of 6 nm, outer diameter of 60 nm, and length of 5-20 μm are synthesized via the partial galvanic displacement of Pd nanotubes. Pt coatings are controlled to a loading of 9 (PtPd 9), 14 (PtPd 14), and 18 (PtPd 18) wt % and estimated to have a thickness of 1.1, 1.7, and 2.2 Pt atoms, respectively, if a uniform and continuous coating is assumed. Oxygen reduction experiments have been used to evaluate Pt/PdNTs, Pt nanotubes, Pd nanotubes, and supported Pt nanoparticle activity for proton exchange membrane fuel cell cathodes. The dollar and area (specific surface area) normalized ORR activities of Pt/PdNTs exceed the United States Department of Energy (DOE) targets. PtPd 9, PtPd 14, and PtPd 18 produce dollar activities of 10.4, 9.4, and 8.7 A$ -1, respectively; PtPd 9 exceeds the DOE dollar activity target (9.7 A$ -1) by 7%. Pt/PdNTs further exceed the DOE area activity target by 40-43%.

KW - core shell catalysts

KW - platinum nanotubes

KW - proton exchange membrane fuel cells

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Platinum-Coated Palladium Nanotubes as Oxygen Reduction Reaction Electrocatalysts

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Keywords

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