Release Time:2019-03-11  Hits:

Indexed by: Journal Article

Date of Publication: 2018-03-01

Journal: APPLIED SURFACE SCIENCE

Included Journals: EI、SCIE

Volume: 433

Page Number: 602-609

ISSN: 0169-4332

Key Words: Metal-organic framework; Pd nanoparticle; One-pot synthesis; Selective hydrogenation

Abstract: Rational design of efficient approaches to fabricate MOFs-coated core-shell composites is promising but challenging. We report here the encapsulation of Pd nanoparticles (Pd NPs) supported flower-like ZnO (F-ZnO) microspheres with ZIF-8 shell through a facile strategy, in which the formation and immobilization of Pd NPs on F-ZnO supports and the subsequent growth of ZIF-8 shells over them are effectively integrated into one-pot synthetic route. Importantly, the utilization of ZnO both as support of Pd NPs and Zn2+ source of ZIF-8 is favorable for the implement of one-pot synthesis, due to its functions in anchoring Pd NPs and inducing ZIF-8 formation. Further insights into the morphological influence of zinc oxide particles on the resulting materials indicate that the flower-like microspheres with 2D nanosheets as sub-units also benefit the coating of Pd NPs supported cores with ZIF-8, resulting in a well-defined core-shell catalyst. The achieved catalyst deliveries remarkable performance in terms of selectivity, anti-poisoning and recyclability in the liquid hydrogenations of alkenes. (C) 2017 Elsevier B.V. All rights reserved.