Shape-Controlled Synthesis of Dumbbell-like Pt–Fe3O4–MnOx Nanoparticles by Governing the Reaction Kinetics | Zendy

Hyunje Woo | Zendy; Junha Park | Zendy; Su-Won Yun | Zendy; Ji Chan Park | Zendy; Sungkyun Park | Zendy; YongTae Kim | Zendy; Kang Hyun Park | Zendy

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Shape-Controlled Synthesis of Dumbbell-like Pt–Fe₃O₄–MnO_x Nanoparticles by Governing the Reaction Kinetics

Author(s) -

Hyunje Woo,

Junha Park,

Su-Won Yun,

Ji Chan Park,

Sungkyun Park,

YongTae Kim,

Kang Hyun Park

Publication year - 2017

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.7b01366

Subject(s) - dumbbell , nucleation , materials science , nanoparticle , catalysis , oxide , chemical engineering , metal , kinetics , graphene , mesoporous material , nanotechnology , inorganic chemistry , chemistry , metallurgy , physical therapy , physics , organic chemistry , quantum mechanics , engineering , biochemistry , medicine

The production of shape-controlled heterometallic nanoparticles (NPs) consisting of Pt and nonprecious metal oxides is crucial to demonstrate the composition-property relationship of NPs. Herein, we report a facile one-pot approach for the controlled synthesis of dumbbell-like Pt-Fe 3 O 4 -MnO x and dendritic Pt-MnO x NPs. The key to the success of this synthesis is in changing the quantity of Fe(CO) 5 additive to control the reaction kinetics. In the absence of Fe(CO) 5 , dendritic Pt-MnO x NPs were synthesized through the assembly of small seed NPs. On the other hand, dumbbell-like Pt-Fe 3 O 4 -MnO x NPs were obtained in the presence of Fe(CO) 5 through controlling the nucleation and growth of Fe and Mn on the Pt NPs, followed by air oxidation. Compared to a Pt/graphene oxide (GO) catalyst, dumbbell-like Pt-Fe 3 O 4 -MnO x NPs on GO showed an enhancement of specific activity toward the oxygen reduction reaction owing to the compressive-strain effect exerted on the Pt lattice.

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