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In‐Situ Confined Growth of Monodisperse Pt Nanoparticle@Graphene Nanobox Composites as Electrocatalytic Nanoreactors
Author(s) -
Lv Yingying,
Fang Yin,
Wu Zhangxiong,
Qian Xufang,
Song Yanfang,
Che Renchao,
Asiri Abdullah M.,
Xia Yongyao,
Tu Bo,
Zhao Dongyuan
Publication year - 2015
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201402289
Subject(s) - nanoreactor , materials science , dispersity , graphene , nanoparticle , chemical engineering , nanotechnology , substrate (aquarium) , polymer chemistry , oceanography , geology , engineering
Monodisperse Pt nanoparticles (NPs) studded in a three‐dimensional (3D) graphene nanobox are successfully synthesized through a simple in‐situ confined growth route for the first time. The nano‐zeolite A was used as a 3D substrate for in‐situ growth of tri‐layered graphenes on the crystal‐surfaces, meanwhile, the inner micropores of which can also be utilized for the confined growth of Pt nanoparticles. The graphene sheets are curved on the edges to form a 3D hollow box morphology, where the monodisperse Pt nanoparticles are homogeneously studded on the inner surfaces. Moreover, the Pt content can be regulated from ∼8 to 50 wt%, and the particle size can be tuned from 2–5 nm by varying the pristine Pt‐ion loading amount and CVD temperature. The Pt NP@graphene nanoboxes possess not only large pore volumes to effectively accommodate large amounts of oxygen, but also supply excellent electrical conductivity for the fast transfer of electrons (∼3.96 e ‐ ), resulting in a high efficiency (175 mA/mg Pt) and long‐term stability (above 1000 cycles) for the oxygen reduction reaction.