Foundation item: Project (20263003) supported by the National Natural Science Foundation of China
Corresponding author: HU Chang-yuan; Tel: +86-791-3831266; E-mail:hcychem@hotmail.com
HU Chang-yuan, et al/Trans. Nonferrous Met. Soc. China 17(2007) s1104
candidate for highly active hydrogenation catalyst by
combination the merits of carbon nanotubes and
amorphous alloy. The present work aimed at preparing
well-dispersed Ni-B amorphous alloy nanoparticles
supported on nanotubes and studying the catalytic
performance in acetylene selective hydrogenation.
2 Experimental
Carbon nanotubes were prepared by catalytic
decomposition of methane on Ni-Cu-Al catalyst[12].
As-grown nanotubes were carried out ammonia heat
treatment (The final product is labeled as CNTs)[9].
Adsorption of Triton x-100 on CNTs was conducted
according to previous work (The final product is labeled
as CNTs-T)[13]. Ni-B/CNTs, Ni-B/CNTs-T amorphous
alloy catalysts were prepared by impregnation-chemical
reduction method elsewhere[13 14].
TEM observation was performed on a Hitachi H600
electron microscope. The Ni loading and bulk
compositions of amorphous alloy were analyzed by
inductively coupled plasma (ICP). The total surface area
(SBET) was measured by N2 adsorption at 77 K. The
surface area of active nickel (SNi) was determined by CO
chemisorption. XRD analysis was executed on a Rigaku
D/MAX-RA powder diffractometer to determine the
amorphous structure of nanotubes supported Ni-B
catalysts.
100 mg catalysts were loaded into the micro-reactor
and then reduced by H2 in situ at 493 K for 30 min. After
that, the gaseous reactant (V(C2H2) V(H2) V(N2)=2 4 94)
flowed into the micro-reactor at a rate of 50 mL/min. The
reactant and product were analyzed with an online gas
chromatograph equipped with TCD, using a porapak N

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