On thermal stability and catalytic reactivity of Zr-based metal-organic framework (UiO-67) encapsulated Pt catalysts

Peter Hester, Shaojun Xu, Wei Liang, Nadeen Al-Janabi, Reza Vakili, Patrick Hill, Christopher A. Muryn, Xiaobo Chen, Philip A. Martin, Xiaolei Fan

Research output: Journal PublicationArticlepeer-review

44 Citations (Scopus)

Abstract

Pt nanoparticles (NPs, 0.5 wt.%) encapsulated in a zirconium-based metal-organic framework (UiO-67 MOF) were synthesized via a linker design method. Thermal behavior of Pt in UiO-67 composite materials was compared with UiO-67 using thermogravimetric and differential thermal analysis (TG-DTA). The results showed that Pt insertion can impair the thermal stability of bulk UiO-67, resulting in a ca. 14% drop in the critical temperature of the thermal decomposition. Temperature-programmed oxidation of materials showed that calcination at 450 K was essential to provide a clean framework. Temperature-programmed reduction of materials revealed that the chemisorption of H2 on UiO-67 (at 323 K) was evidently enhanced owing to the incorporation of Pt NPs, thus making PtNP@UiO-67 suitable for hydrogenation reactions and hydrogen storage. PtNP@UiO-67 catalyst was evaluated by the oxidation and hydrogenation of 5-hydroxymethylfurfural in aqueous solutions at 363 K, showing improved activity and selectivity in hydrogenation reactions.

Original languageEnglish
Pages (from-to)85-94
Number of pages10
JournalJournal of Catalysis
Volume340
DOIs
Publication statusPublished - 1 Aug 2016
Externally publishedYes

Keywords

  • 5-Hydroxymethylfurfural (HMF)
  • Metal-organic frameworks (MOFs)
  • Platinum nanoparticles (Pt NPs)
  • Reactivity
  • Thermal stability
  • TPO
  • TPR
  • UiO-67
  • Zirconium MOFs

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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