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Pd–Ru Bimetallic Nanocrystals with a Porous Structure and Their Enhanced Catalytic Properties
Author(s) -
Wan Shulin,
Wang Qingxiao,
Ye Haihang,
Kim Moon J.,
Xia Xiaohu
Publication year - 2018
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201700386
Subject(s) - bimetallic strip , nanocrystal , catalysis , porosity , materials science , chemical engineering , crystal structure , crystal (programming language) , specific surface area , crystal growth , crystallography , nanotechnology , chemistry , organic chemistry , composite material , engineering , programming language , computer science
This work, for the first time, reports the synthesis, characterization, and catalytic properties of a novel type of bimetallic nanocrystals—Pd–Ru nanocrystals with a highly porous structure on the surface. The synthesis relies on a seed‐mediated growth, at which Ru atoms are added to the surface of preformed Pd nanocubes as the seeds. The key to the successful synthesis is to direct the crystal growth along a 3D island mode through kinetic control. The Ru shells on Pd surfaces primarily take a hexagonal close packing (hcp) crystal structure. The extent of porosity for Ru shells can be conveniently controlled by adjusting the amount of Ru precursor introduced to a synthesis. The Pd–Ru porous nanocrystals exhibit a substantially enhanced peroxidase‐like activity with a catalytic constant ( K cat ) as high as 4.8 × 10 5 s −1 , which is two‐orders‐of‐magnitude greater than the K cat value of natural peroxidases.