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

Hester, Peter, Xu, Shaojun, Liang, Wei, Al-Janabi, Nadeen, Vakili, Reza, Hill, Patrick, Muryn, Christopher A., Chen, Xiaobo, Martin, Philip A. and Fan, Xiaolei 2016. On thermal stability and catalytic reactivity of Zr-based metal–organic framework (UiO-67) encapsulated Pt catalysts. Journal of Catalysis 340 , pp. 85-94. 10.1016/j.jcat.2016.05.003

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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.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry Cardiff Catalysis Institute (CCI)
Publisher:	Elsevier
ISSN:	0021-9517
Date of Acceptance:	7 May 2016
Last Modified:	30 Mar 2021 15:00
URI:	https://orca.cardiff.ac.uk/id/eprint/139455

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