Oxygen Electroreduction Activity and X-Ray Photoelectron Spectroscopy of Platinum and Early Transition Metal Alloys

Ifan Stephens; Alexander S. Bondarenko; Lone Bech; Ib Chorkendorff; Alexander S. Bondarenko

doi:10.1002/cctc.201100343

Oxygen Electroreduction Activity and X-Ray Photoelectron Spectroscopy of Platinum and Early Transition Metal Alloys

Ifan Stephens, Alexander S. Bondarenko, Lone Bech, Ib Chorkendorff, Alexander S. Bondarenko

Ruhr University Bochum

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

The oxygen reduction reaction (ORR) was studied experimentally on sputter-cleaned, polycrystalline electrodes of Pt3Y, Pt5Y, Pt2Y, Pt3Sc, Pt3Hf, Pt3Zr and Pt under conditions relevant for low-temperature fuel cells. The surfaces were characterised insitu by means of electrochemical methods and exsitu under ultrahigh vacuum conditions. The ORR activity was established in an electrochemical cell containing 0.1M HClO4 by use of a rotating ring disk electrode assembly. The surface composition was characterised before and after the electrochemical measurements by using angle-resolved X-ray photoelectron spectroscopy. The ORR activity of the electrodes increased in the following order: Pt2Y≈Pt3Zr≈Pt≈

Original language	English
Journal	ChemCatChem
Volume	4
Issue number	3
Pages (from-to)	341-349
ISSN	1867-3880
DOIs	https://doi.org/10.1002/cctc.201100343
Publication status	Published - 2012

Keywords

Alloys
Cerium alloys
Electrochemistry
Electrodes
Electrolytic reduction
Energy conversion
Hafnium
Hydrogen
Photoelectron spectroscopy
Platinum
Reduction
Scandium
Transition metal alloys
X ray photoelectron spectroscopy
Zirconium
Platinum alloys

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title = "Oxygen Electroreduction Activity and X-Ray Photoelectron Spectroscopy of Platinum and Early Transition Metal Alloys",

abstract = "The oxygen reduction reaction (ORR) was studied experimentally on sputter-cleaned, polycrystalline electrodes of Pt3Y, Pt5Y, Pt2Y, Pt3Sc, Pt3Hf, Pt3Zr and Pt under conditions relevant for low-temperature fuel cells. The surfaces were characterised insitu by means of electrochemical methods and exsitu under ultrahigh vacuum conditions. The ORR activity was established in an electrochemical cell containing 0.1M HClO4 by use of a rotating ring disk electrode assembly. The surface composition was characterised before and after the electrochemical measurements by using angle-resolved X-ray photoelectron spectroscopy. The ORR activity of the electrodes increased in the following order: Pt2Y≈Pt3Zr≈Pt≈",

keywords = "Alloys, Cerium alloys, Electrochemistry, Electrodes, Electrolytic reduction, Energy conversion, Hafnium, Hydrogen, Photoelectron spectroscopy, Platinum, Reduction, Scandium, Transition metal alloys, X ray photoelectron spectroscopy, Zirconium, Platinum alloys",

author = "Ifan Stephens and Bondarenko, {Alexander S.} and Lone Bech and Ib Chorkendorff and Bondarenko, {Alexander S.}",

year = "2012",

doi = "10.1002/cctc.201100343",

language = "English",

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AU - Stephens, Ifan

AU - Bondarenko, Alexander S.

AU - Bech, Lone

AU - Chorkendorff, Ib

AU - Bondarenko, Alexander S.

PY - 2012

Y1 - 2012

N2 - The oxygen reduction reaction (ORR) was studied experimentally on sputter-cleaned, polycrystalline electrodes of Pt3Y, Pt5Y, Pt2Y, Pt3Sc, Pt3Hf, Pt3Zr and Pt under conditions relevant for low-temperature fuel cells. The surfaces were characterised insitu by means of electrochemical methods and exsitu under ultrahigh vacuum conditions. The ORR activity was established in an electrochemical cell containing 0.1M HClO4 by use of a rotating ring disk electrode assembly. The surface composition was characterised before and after the electrochemical measurements by using angle-resolved X-ray photoelectron spectroscopy. The ORR activity of the electrodes increased in the following order: Pt2Y≈Pt3Zr≈Pt≈

AB - The oxygen reduction reaction (ORR) was studied experimentally on sputter-cleaned, polycrystalline electrodes of Pt3Y, Pt5Y, Pt2Y, Pt3Sc, Pt3Hf, Pt3Zr and Pt under conditions relevant for low-temperature fuel cells. The surfaces were characterised insitu by means of electrochemical methods and exsitu under ultrahigh vacuum conditions. The ORR activity was established in an electrochemical cell containing 0.1M HClO4 by use of a rotating ring disk electrode assembly. The surface composition was characterised before and after the electrochemical measurements by using angle-resolved X-ray photoelectron spectroscopy. The ORR activity of the electrodes increased in the following order: Pt2Y≈Pt3Zr≈Pt≈

KW - Alloys

KW - Cerium alloys

KW - Electrochemistry

KW - Electrodes

KW - Electrolytic reduction

KW - Energy conversion

KW - Hafnium

KW - Hydrogen

KW - Photoelectron spectroscopy

KW - Platinum

KW - Reduction

KW - Scandium

KW - Transition metal alloys

KW - X ray photoelectron spectroscopy

KW - Zirconium

KW - Platinum alloys

U2 - 10.1002/cctc.201100343

DO - 10.1002/cctc.201100343

M3 - Journal article

SN - 1867-3880

VL - 4

SP - 341

EP - 349

JO - ChemCatChem

JF - ChemCatChem

IS - 3

ER -

Oxygen Electroreduction Activity and X-Ray Photoelectron Spectroscopy of Platinum and Early Transition Metal Alloys

Abstract

Keywords

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