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Hydrogenation of m ‐chloronitrobenzene over amorphous Ni‐B/CNTs catalysts: Promoting effect of CNTs confinement on the catalytic performance
Author(s) -
Li Feng,
Liang Jinrong,
Wang Keliang,
Cao Bo,
Zhu Wenxi,
Song Hua
Publication year - 2017
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.22814
Subject(s) - catalysis , materials science , carbon nanotube , amorphous solid , chemical engineering , thermal stability , alloy , hydrogen , amorphous carbon , amorphous metal , nanotechnology , composite material , organic chemistry , chemistry , engineering
Ni‐B amorphous alloy particles were selectively loaded inside and outside of carbon nanotubes (CNTs) to form a series of Ni‐B/CNTs amorphous alloy catalysts. The confinement effects of the CNTs on the physicochemical properties of Ni‐B/CNTs were investigated. The results show that compared with external loading, the Ni‐B active components after internal loading were subjected to the confinement effect, which better inhibited the growth and aggregation of Ni‐B particles, forming smaller‐size Ni‐B particles, and improved the thermal stability of the Ni‐B amorphous alloy. Moreover, the Ni‐B particles confined in the channels can more efficiently activate hydrogen. During the m ‐chloronitrobenzene hydrogenation, the Ni‐B/CNTs with Ni‐B internal loading showed higher catalytic hydrogenation activity than that for Ni‐B external loading. High‐temperature treatment caused a decrease in the catalytic activity, but the internal loading improved the stability of the catalysts. The internal loading method could effectively reduce the loss of the active component, which contributed to improving the stability of the catalyst.