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Oriented Growth and Assembly of Ag@C@Co Pentagonalprism Nanocables and their Highly Active Selected Catalysis Along the Edges for Dehydrogenation
Author(s) -
Sun Baolei,
Wen Ming,
Wu Qingsheng,
Peng Jin
Publication year - 2012
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201200274
Subject(s) - materials science , dehydrogenation , ammonia borane , catalysis , aqueous solution , absorption spectroscopy , nanowire , absorption (acoustics) , surface plasmon resonance , shell (structure) , nanotechnology , spectroscopy , chemical engineering , nanoparticle , composite material , optics , organic chemistry , chemistry , physics , engineering , quantum mechanics
Magnetic double‐shelled Ag@C@Co pentagonalprism nanocables are fabricated using a synchronous growth and oriented assembly process, in which the second shell of Co is arranged along the edges of Ag@C pentagonalprism nanowires (NWs). The resulting Ag@C@Co pentagonalprism nanocables exhibit an average diameter of ≈400 nm and consist of Ag core NWs with diameter of ≈200 nm and C middle layers with a thickness of ≈10 nm as well as outer Co shells with a thickness of ≈100 nm. UV‐vis absorption spectroscopy shows that the Co shell on Ag@C NWs can damp the surface plasmon resonance (SPR) of the Ag core wires and lead to a red‐shifted SPR absorption peak. Additionally, the Ag@C@Co nanocables have the ferromagnetic behavior, which can be controlled by modulating the shell density. The resulting magnetic Ag@C@Co nanocables exert excellent selected catalytic activity along the edges toward the dehydrogenation of ammonia borane aqueous under ambient conditions at room temperature.