Controlled Pyrolysis of Ni-MOF-74 as a Promising Precursor for the Creation of Highly Active Ni Nanocatalysts in Size-Selective Hydrogenation

Kazuki Nakatsuka, Takeharu Yoshii, Yasutaka Kuwahara, Kohsuke Mori, Hiromi Yamashita

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)

Abstract

Metal organic frameworks (MOFs) are a class of porous organic-inorganic crystalline materials that have attracted much attention as H2 storage devices and catalytic supports. In this paper, the synthesis of highly-dispersed Ni nanoparticles (NPs) for the hydrogenation of olefins was achieved by employing Ni-MOF-74 as a precursor. Investigations of the structural transformation of Ni species derived from Ni-MOF-74 during heat treatment were conducted. The transformation was monitored in detail by a combination of XRD, in situ XAFS, and XPS measurements. Ni NPs prepared from Ni-MOF-74 were easily reduced by the generation of reducing gases accompanied by the decomposition of Ni-MOF-74 structures during heat treatment at over 300 °C under N2 flow. Ni-MOF-74-300 exhibited the highest activity for the hydrogenation of 1-octene due to efficient suppression of excess agglomerated Ni species during heat treatment. Moreover, Ni-MOF-74-300 showed not only high activity for the hydrogenation of olefins but also high size-selectivity because of the selective formation of Ni NPs covered by MOFs and the MOF-derived carbonaceous layer.

Original languageEnglish
Pages (from-to)898-905
Number of pages8
JournalChemistry - A European Journal
Volume24
Issue number4
DOIs
Publication statusPublished - 2018 Jan 19
Externally publishedYes

Keywords

  • Hydrogenation of olefins
  • Ni catalyst
  • Ni-MOF
  • Pyrolysis

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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