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 journalConference article

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 languageEnglish (US)
Pages (from-to)25-34
Number of pages10
JournalECS Transactions
Volume61
Issue number31
DOIs
StatePublished - Jan 1 2014
EventSymposium in Honor of Andrzej Wieckowski - 225th ECS Meeting - Orlando, United States
Duration: May 11 2014May 15 2014

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Electrocatalysts
Catalysts
Oxygen
Metals
Ion exchange
Ligands
Amines
Heat treatment
Annealing
Nanoparticles
Temperature

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Facet-controlled metal alloy electrocatalysts for oxygen reduction reaction : Unconventional post treatment of Pt3Ni octahedral catalysts for enhanced activity. / Wu, J. B.; Yang, S. C.; Yang, H.

In: ECS Transactions, Vol. 61, No. 31, 01.01.2014, p. 25-34.

Research output: Contribution to journalConference article

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