A Monodispersed Spherical Zr-Based Metal-Organic Framework Catalyst, Pt/Au@Pd@UIO-66, Comprising an Au@Pd Core-Shell Encapsulated in a UIO-66 Center and Its Highly Selective CO2 Hydrogenation to Produce CO

Zhizhong Zheng; Haitao Xu; Zhenliang Xu; Jianping Ge

doi:10.1002/smll.201702812

A Monodispersed Spherical Zr-Based Metal-Organic Framework Catalyst, Pt/Au@Pd@UIO-66, Comprising an Au@Pd Core-Shell Encapsulated in a UIO-66 Center and Its Highly Selective CO₂ Hydrogenation to Produce CO

Small. 2018 Feb;14(5). doi: 10.1002/smll.201702812. Epub 2017 Dec 4.

Authors

Zhizhong Zheng¹, Haitao Xu¹, Zhenliang Xu¹, Jianping Ge²

Affiliations

¹ State Key Laboratory of Chemical Engineering, Membrane Science and Engineering R&D Lab, East China University of Science and Technology, Shanghai, 200237, China.
² Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200237, China.

PMID: 29205859
DOI: 10.1002/smll.201702812

Abstract

A Zr-based metal-organic framework (MOF) catalyst, Pt/Au@Pd@UIO-66, is assembled, where UIO-66 is Zr₆ O₄ (OH)₄ (BDC)₆ (BDC = 1,4-benzenedicarboxylate). The gold nanoparticles (NPs) act as the core for the epitaxial growth of Pd shells, and the core-shell monodispersed nanosphere Au@Pd is encapsulated into UIO-66 to control its morphology and impart nanoparticle functionality. The microporous nature of UIO-66 assists the adsorption of Pt NPs, which in turn enhances the interaction between NPs and UIO-66, favoring the formation of isolated and well-dispersed Pt NP active sites. This MOF exhibits high catalytic activity and CO product selectivity for the reverse-water-gas-shift reaction in a fixed-bed flow reactor.

Keywords: Zr-based MOFs; core-shell; reverse-water-gas-shift.

Publication types

Research Support, Non-U.S. Gov't