Facet-controlled metal alloy electrocatalysts for oxygen reduction reaction: Unconventional post treatment of Pt3Ni octahedral catalysts for enhanced activity

J. B. Wu; S. C. Yang; H. Yang

doi:10.1149/06131.0025ecst

Facet-controlled metal alloy electrocatalysts for oxygen reduction reaction: Unconventional post treatment of Pt₃Ni octahedral catalysts for enhanced activity

J. B. Wu, S. C. Yang, H. Yang

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

Abstract

The paper describes a ligand exchange approach to the postsynthesis treatment of solution phase produced Pt₃Ni octahedral electrocatalysts for the reduction of oxygen. Ligand exchange using short-chain amine is shown to be critical for achieving high activity towards the oxygen reduction reaction (ORR). Unlike Pt or other ORR electrocatalysts without well-defined (111) surface, the maximum ORR activity for Pt3Ni octahedral catalysts was achieved at a low annealing temperature of 230 °C. This study indicates a different thermal treatment strategy is required for Pt alloy electrocatalysts with well-defined (111) surface, such as octahedral, tetrahedral, and icosahedral nanoparticles.

Original language	English (US)
Pages (from-to)	25-34
Number of pages	10
Journal	ECS Transactions
Volume	61
Issue number	31
DOIs	https://doi.org/10.1149/06131.0025ecst
State	Published - 2014
Event	Symposium in Honor of Andrzej Wieckowski - 225th ECS Meeting - Orlando, United States Duration: May 11 2014 → May 15 2014

ASJC Scopus subject areas

General Engineering

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10.1149/06131.0025ecst

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title = "Facet-controlled metal alloy electrocatalysts for oxygen reduction reaction: Unconventional post treatment of Pt3Ni octahedral catalysts for enhanced activity",

abstract = "The paper describes a ligand exchange approach to the postsynthesis treatment of solution phase produced Pt3Ni octahedral electrocatalysts for the reduction of oxygen. Ligand exchange using short-chain amine is shown to be critical for achieving high activity towards the oxygen reduction reaction (ORR). Unlike Pt or other ORR electrocatalysts without well-defined (111) surface, the maximum ORR activity for Pt3Ni octahedral catalysts was achieved at a low annealing temperature of 230 °C. This study indicates a different thermal treatment strategy is required for Pt alloy electrocatalysts with well-defined (111) surface, such as octahedral, tetrahedral, and icosahedral nanoparticles.",

author = "Wu, {J. B.} and Yang, {S. C.} and H. Yang",

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T2 - Symposium in Honor of Andrzej Wieckowski - 225th ECS Meeting

AU - Wu, J. B.

AU - Yang, S. C.

AU - Yang, H.

N1 - Publisher Copyright: © The Electrochemical Society.

PY - 2014

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N2 - The paper describes a ligand exchange approach to the postsynthesis treatment of solution phase produced Pt3Ni octahedral electrocatalysts for the reduction of oxygen. Ligand exchange using short-chain amine is shown to be critical for achieving high activity towards the oxygen reduction reaction (ORR). Unlike Pt or other ORR electrocatalysts without well-defined (111) surface, the maximum ORR activity for Pt3Ni octahedral catalysts was achieved at a low annealing temperature of 230 °C. This study indicates a different thermal treatment strategy is required for Pt alloy electrocatalysts with well-defined (111) surface, such as octahedral, tetrahedral, and icosahedral nanoparticles.

AB - The paper describes a ligand exchange approach to the postsynthesis treatment of solution phase produced Pt3Ni octahedral electrocatalysts for the reduction of oxygen. Ligand exchange using short-chain amine is shown to be critical for achieving high activity towards the oxygen reduction reaction (ORR). Unlike Pt or other ORR electrocatalysts without well-defined (111) surface, the maximum ORR activity for Pt3Ni octahedral catalysts was achieved at a low annealing temperature of 230 °C. This study indicates a different thermal treatment strategy is required for Pt alloy electrocatalysts with well-defined (111) surface, such as octahedral, tetrahedral, and icosahedral nanoparticles.

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