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

16 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

Access to Document

10.1039/c5cc05706j

Cite this

@article{2804a925390a4b82af1573a18238d996,

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.\}",

note = "Publisher Copyright: {\textcopyright} The Royal Society of Chemistry 2015.",

year = "2015",

doi = "10.1039/c5cc05706j",

language = "English",

volume = "51",

pages = "16633--16636",

journal = "Chemical Communications",

issn = "1359-7345",

publisher = "Royal Society of Chemistry",

number = "93",

}

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 - https://www.scopus.com/pages/publications/84947460654

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

Access to Document

Other files and links

Fingerprint

Cite this