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Multiply Confined Nickel Nanocatalysts Produced by Atomic Layer Deposition for Hydrogenation Reactions
Author(s) -
Gao Zhe,
Dong Mei,
Wang Guizhen,
Sheng Pei,
Wu Zhiwei,
Yang Huimin,
Zhang Bin,
Wang Guofu,
Wang Jianguo,
Qin Yong
Publication year - 2015
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.201503749
Subject(s) - nanomaterial based catalyst , catalysis , atomic layer deposition , nanoreactor , nickel , materials science , nanoparticle , nanotechnology , chemical engineering , deposition (geology) , layer (electronics) , leaching (pedology) , chemistry , metallurgy , organic chemistry , paleontology , sediment , engineering , biology , environmental science , soil water , soil science
To design highly efficient catalysts, new concepts for optimizing the metal–support interactions are desirable. Here we introduce a facile and general template approach assisted by atomic layer deposition (ALD), to fabricate a multiply confined Ni‐based nanocatalyst. The Ni nanoparticles are not only confined in Al 2 O 3 nanotubes, but also embedded in the cavities of Al 2 O 3 interior wall. The cavities create more Ni–Al 2 O 3 interfacial sites, which facilitate hydrogenation reactions. The nanotubes inhibit the leaching and detachment of Ni nanoparticles. Compared with the Ni‐based catalyst supported on the outer surface of Al 2 O 3 nanotubes, the multiply confined catalyst shows a striking improvement of catalytic activity and stability in hydrogenation reactions. Our ALD‐assisted template method is general and can be extended for other multiply confined nanoreactors, which may have potential applications in many heterogeneous reactions.