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)|
|Number of pages||10|
|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