Controllable Encapsulation of "Clean" Metal Clusters within MOFs through Kinetic Modulation: Towards Advanced Heterogeneous Nanocatalysts

Hongli Liu; Lina Chang; Cuihua Bai; Liyu Chen; Rafael Luque; Yingwei Li

doi:10.1002/anie.201511009

Controllable Encapsulation of "Clean" Metal Clusters within MOFs through Kinetic Modulation: Towards Advanced Heterogeneous Nanocatalysts

Angew Chem Int Ed Engl. 2016 Apr 11;55(16):5019-23. doi: 10.1002/anie.201511009. Epub 2016 Mar 11.

Authors

Hongli Liu¹, Lina Chang¹, Cuihua Bai¹, Liyu Chen¹, Rafael Luque², Yingwei Li³

Affiliations

¹ School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China.
² Departamento de Química Orgánica, Universidad de Córdoba, Edif. Marie Curie, Ctra Nnal IVa Km 396, 14014, Córdoba, Spain. [email protected].
³ School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China. [email protected].

Abstract

Surfactant-free tiny Pt clusters were successfully encapsulated within MOFs with controllable size and spatial distribution by a novel kinetically modulated one-step strategy. Our synthesis relies on the rational manipulation of the reduction rate of Pt ions and/or the growth rate of MOFs by using H2 as assistant reducing agent and/or acetic acid as MOF-formation modulator. The as-prepared Pt@MOF core-shell composites exhibited exceedingly high activity and excellent selectivity in the oxidation of alcohols as a result of the ultrafine "clean" Pt clusters, as well as interesting molecular-sieving effects derived from the outer platinum-free MOF shell.

Keywords: encapsulation; heterogeneous catalysis; metal clusters; metal-organic frameworks; platinum.

Publication types

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