4.6 Article

Structurally ordered Pt3Co for oxygen reduction reaction prepared using polyvinylpyrrolidone as auxiliary dispersant

Journal

NANOTECHNOLOGY
Volume 31, Issue 45, Pages -

Publisher

IOP Publishing Ltd
DOI: 10.1088/1361-6528/ababc9

Keywords

Pt3Co; spray paint drying; polyvinylpyrrolidone; oxygen reduction reaction

Funding

  1. National Basic Research Program of China [2012CB932304]

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Structurally ordered Pt3Co/C nanoparticles (NPs) were obtainedviaa spray paint drying method with an annealing treatment. The addition of a suitable dose of polyvinylpyrrolidone resulted in a narrow size distribution of the Pt3Co/C-600-1 NPs, an average particle size ofca.4.6 nm, which may be due to the enhanced dispersion in aqueous solution resulting from the carbon support. The sample denoted as Pt3Co/C-600-1 NPs performs high activity for oxygen reduction reaction with the mass activity (MA)ca.3 times higher than that of a commercial Pt/C catalyst at 0.9 V. Accelerated durability tests (ADTs) showed that Pt3Co/C-600-1 NPs exhibit superior stability with a minimal loss of 17.5% in MA at 0.9 V after 5000 cycles, while Pt/C catalysts show loss of 44.4%. This simple two-step strategy provides an effective way to prepare Pt-based catalysts for industrial application.

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