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Graphene‐Supported Ultrafine Metal Nanoparticles Encapsulated by Mesoporous Silica: Robust Catalysts for Oxidation and Reduction Reactions
Author(s) -
Shang Lu,
Bian Tong,
Zhang Baihui,
Zhang Donghui,
Wu LiZhu,
Tung ChenHo,
Yin Yadong,
Zhang Tierui
Publication year - 2014
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201306863
Subject(s) - catalysis , materials science , graphene , mesoporous material , nanoparticle , chemical engineering , nanosheet , metal , mesoporous silica , nanotechnology , chemistry , organic chemistry , metallurgy , engineering
Graphene nanosheet‐supported ultrafine metal nanoparticles encapsulated by thin mesoporous SiO 2 layers were prepared and used as robust catalysts with high catalytic activity and excellent high‐temperature stability. The catalysts can be recycled and reused in many gas‐ and solution‐phase reactions, and their high catalytic activity can be fully recovered by high‐temperature regeneration, should they be deactivated by feedstock poisoning. In addition to the large surface area provided by the graphene support, the enhanced catalytic performance is also attributed to the mesoporous SiO 2 layers, which not only stabilize the ultrafine metal nanoparticles, but also prevent the aggregation of the graphene nanosheets. The synthetic strategy can be extended to other metals, such as Pd and Ru, for preparing robust catalysts for various reactions.