One-Step Synthesis of a High Performance Pt-Fe3O4 Catalyst: Intermetallic Al13Fe4 as a Platform and Precursor

Satoshi Kameoka, Satoru Wakabayashi, Eiji Abe, An Pang Tsai

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Abstract: A one-step process was developed to prepare catalysts with monodispersed Pt nanocrystals on Fe3O4, based on leaching of the intermetallic compounds Al76.5−xFe23.5Ptx (at%: x = 0, 0.05, 0.5, 1) with an aqueous 10 wt% NaOH solution. In this process, the intermetallic Al13Fe4 lattice acts as a platform in which Pt atoms can be homogeneously dispersed, and also serves as a precursor for subsequent leaching. Compared with conventional preparation methods, including impregnation and coprecipitation, this one-step process eliminates the need for thermal treatments such as high temperature calcination and/or reduction, thus minimizing the sintering or crystal grain growth problems caused by these treatments. Consequently, the materials derived from Al76Fe23.5Pt0.5 exhibit high catalytic performance during CO oxidation and the CO-PROX reaction due to the monodispersed Pt nanocrystals in the porous or nanoparticle Fe3O4 matrix. Graphical Abstract: A high performance nanocomposite Pt-Fe3O4 catalyst, consisting of monodispersed Pt nanocrystals in a porous Fe3O4 matrix, was prepared by a one-step process based on caustic leaching of a bulk Al13(Fe + Pt)4 intermetallic compound.[Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)1309-1316
Number of pages8
JournalCatalysis Letters
Volume146
Issue number7
DOIs
Publication statusPublished - 2016 Jul 1

Keywords

  • AlFe
  • Intermetallic compound
  • Leaching
  • Monodispersed Pt nanocrystals
  • One-step synthesis
  • Pt-FeO

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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