Catalysis Letters, Vol.149, No.9, 2492-2499, 2019
Hierarchical Sheet-on-Sphere Heterostructures as Supports for Metal Nanoparticles: A Robust Catalyst System
Two-dimensional (2D) materials enabled the creation of hybrid heterostructures with a variety of properties. Here, inspired by the core-shell structures, we report the synthesis of a hierarchical structure based on the growth of 2D Mn/Ni(OH)(x) sheets on the CeO2 spheres, so called sheet-on-sphere heterostructures. The supported 2D sheets serve as robust support for the immobilization of metal nanoparticles. The as-formed hetero structures offer a robust catalyst system and display excellent catalytic performances toward the 4-nitrophenol reduction in liquid-phase and CO oxidation in gas phase. Moreover, the present catalyst exhibits excellent durability and reusability attributed to the compartmentalized active species against sintering.Graphic AbstractThe graphical abstract showing the design and synthesis of sheet-on-sphere hierarchical structures and the subsequent metal nanoparticles loading. [GRAPHICS] .