Coupling molecular and nanoparticle catalysts on single metal−organic framework microcrystals for the tandem reaction of H2O2 generation and selective alkene oxidation

Rungmai Limvorapitux, Lien Yang Chou, Allison P. Young, Chia Kuang Tsung*, Son Binh T. Nguyen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

A molecular catalyst, (sal)MoVI, and a heterogeneous catalyst, either Pd or Au nanoparticles (NPs), were integrated into one UiO-66 MOF microcrystal. The resulting dually functionalized catalysts, Pd@UiO-66-(sal)Mo and Au/UiO-66-(sal)Mo, have been utilized for a one-pot tandem reaction of H2O2 generation and selective liquid-phase alkene oxidation. The NPs serve as catalysts for the production of H2O2 from H2 and O2 gases, while the (sal)Mo moieties function as the oxidation catalyst. When the metal NPs are fully encapsulated within the MOF microcrystals, the alkene hydrogenation side reaction is largely suppressed, with a 6-fold decrease in the hydrogenation/oxidation product ratio for 5-bromo-1-cyclooctene favoring the epoxide as the major product. For Au/UiO-66-(sal)Mo, where the two catal sts are in close roximit on the MOF microcr stal the enhancement in oxidation productivity is increased by 10 times in comparison to the [Au/UiO-66-NH2 + UiO-66-sal(Mo)] physical mixture of the two singly functionalized MOFs.

Original languageEnglish (US)
Pages (from-to)6691-6698
Number of pages8
JournalACS Catalysis
Volume7
Issue number10
DOIs
StatePublished - Oct 6 2017

Keywords

  • Alkene oxidation
  • In situ H2O2 generation
  • Metal−organic framework
  • Tandem reaction
  • UiO-66

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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