Segregated Pt on Pd nanotubes for enhanced oxygen reduction activity in alkaline electrolyte

Samuel St. John; Robert W. Atkinson; Ondrej Dyck; Cheng Jun Sun; Thomas A. Zawodzinski; Alexander B. Papandrew

doi:10.1039/c5cc05706j

Segregated Pt on Pd nanotubes for enhanced oxygen reduction activity in alkaline electrolyte

Samuel St. John, Robert W. Atkinson, Ondrej Dyck, Cheng Jun Sun, Thomas A. Zawodzinski, Alexander B. Papandrew

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

15 Scopus citations

Abstract

Nanoscaled Pt domains were integrated with Pd nanotubes via vapor deposition to yield a highly active electrocatalyst for the oxygen reduction reaction (ORR) in alkaline media. The surface-area-normalized ORR activity of these bi-metallic Pt-on-Pd nanotubes (PtPdNTs) was nearly 6× the corresponding carbon-supported Pt nanoparticle (Pt/C) activity at 0.9 V vs. RHE (1.5 vs. 0.24 mA cm_metal^-2, respectively). Furthermore, the high specific activity of the PtPdNTs was achieved without sacrificing mass-normalized activity, which is more than twice that of Pt/C (0.333 A mg_PtPdNT^-1vs. 0.141 A mg_Pt/C^-1) and also greater than that of Pd/C (0.221 A mg_Pd/C^-1). We attribute the enhancements in specific and mass activity to modifications of the segregated Pt electronic structure and to nanoscale porosity, respectively.

Original language	English
Pages (from-to)	16633-16636
Number of pages	4
Journal	Chemical Communications
Volume	51
Issue number	93
DOIs	https://doi.org/10.1039/c5cc05706j
State	Published - 2015
Externally published	Yes

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title = "Segregated Pt on Pd nanotubes for enhanced oxygen reduction activity in alkaline electrolyte",

abstract = "Nanoscaled Pt domains were integrated with Pd nanotubes via vapor deposition to yield a highly active electrocatalyst for the oxygen reduction reaction (ORR) in alkaline media. The surface-area-normalized ORR activity of these bi-metallic Pt-on-Pd nanotubes (PtPdNTs) was nearly 6× the corresponding carbon-supported Pt nanoparticle (Pt/C) activity at 0.9 V vs. RHE (1.5 vs. 0.24 mA cmmetal-2, respectively). Furthermore, the high specific activity of the PtPdNTs was achieved without sacrificing mass-normalized activity, which is more than twice that of Pt/C (0.333 A mgPtPdNT-1vs. 0.141 A mgPt/C-1) and also greater than that of Pd/C (0.221 A mgPd/C-1). We attribute the enhancements in specific and mass activity to modifications of the segregated Pt electronic structure and to nanoscale porosity, respectively.",

author = "{St. John}, Samuel and Atkinson, {Robert W.} and Ondrej Dyck and Sun, {Cheng Jun} and Zawodzinski, {Thomas A.} and Papandrew, {Alexander B.}",

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year = "2015",

doi = "10.1039/c5cc05706j",

language = "English",

volume = "51",

pages = "16633--16636",

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publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Segregated Pt on Pd nanotubes for enhanced oxygen reduction activity in alkaline electrolyte

AU - St. John, Samuel

AU - Atkinson, Robert W.

AU - Dyck, Ondrej

AU - Sun, Cheng Jun

AU - Zawodzinski, Thomas A.

AU - Papandrew, Alexander B.

N1 - Publisher Copyright: © The Royal Society of Chemistry 2015.

PY - 2015

Y1 - 2015

N2 - Nanoscaled Pt domains were integrated with Pd nanotubes via vapor deposition to yield a highly active electrocatalyst for the oxygen reduction reaction (ORR) in alkaline media. The surface-area-normalized ORR activity of these bi-metallic Pt-on-Pd nanotubes (PtPdNTs) was nearly 6× the corresponding carbon-supported Pt nanoparticle (Pt/C) activity at 0.9 V vs. RHE (1.5 vs. 0.24 mA cmmetal-2, respectively). Furthermore, the high specific activity of the PtPdNTs was achieved without sacrificing mass-normalized activity, which is more than twice that of Pt/C (0.333 A mgPtPdNT-1vs. 0.141 A mgPt/C-1) and also greater than that of Pd/C (0.221 A mgPd/C-1). We attribute the enhancements in specific and mass activity to modifications of the segregated Pt electronic structure and to nanoscale porosity, respectively.

AB - Nanoscaled Pt domains were integrated with Pd nanotubes via vapor deposition to yield a highly active electrocatalyst for the oxygen reduction reaction (ORR) in alkaline media. The surface-area-normalized ORR activity of these bi-metallic Pt-on-Pd nanotubes (PtPdNTs) was nearly 6× the corresponding carbon-supported Pt nanoparticle (Pt/C) activity at 0.9 V vs. RHE (1.5 vs. 0.24 mA cmmetal-2, respectively). Furthermore, the high specific activity of the PtPdNTs was achieved without sacrificing mass-normalized activity, which is more than twice that of Pt/C (0.333 A mgPtPdNT-1vs. 0.141 A mgPt/C-1) and also greater than that of Pd/C (0.221 A mgPd/C-1). We attribute the enhancements in specific and mass activity to modifications of the segregated Pt electronic structure and to nanoscale porosity, respectively.

UR - http://www.scopus.com/inward/record.url?scp=84947460654&partnerID=8YFLogxK

U2 - 10.1039/c5cc05706j

DO - 10.1039/c5cc05706j

M3 - Article

AN - SCOPUS:84947460654

SN - 1359-7345

VL - 51

SP - 16633

EP - 16636

JO - Chemical Communications

JF - Chemical Communications

IS - 93

ER -

Segregated Pt on Pd nanotubes for enhanced oxygen reduction activity in alkaline electrolyte

Abstract

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