In this work, mesoporous silica SBA-16-supported NiCo
bimetallic
nanocatalysts were synthesized by coimpregnation of Ni and Co precursors
followed by calcination and reduction, and various characterization
techniques confirm the formation of NiCo bimetallic nanostructures
in the catalysts. The synthesized NiCo/SBA-16 shows enhanced catalytic
performance for hydrogenation of a series of nitroaromatics. Under
the reaction conditions of 80 °C and 1.0 MPa of H2, the yields of aniline for nitrobenzene hydrogenation over NiCo0.3/SBA-16 can reach more than 99% at 2.0 h. The enhanced catalytic
performance can be ascribed to the formation of NiCo bimetallic nanostructures,
where the synergistic effect between Ni and Co improves their catalytic
activities for hydrogenation of nitroaromatics.
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