Journal
CATALYSIS LETTERS
Volume 123, Issue 3-4, Pages 264-268Publisher
SPRINGER
DOI: 10.1007/s10562-008-9417-5
Keywords
impregnation; Ni-SiO2 catalysts; NaBH4; nitrobenzene; reduction
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Various nitroaromatics are successfully reduced to amines with 100% conversion and selectivity in methanol at low temperature (approximate to 5 degrees C), by using versatile system of 5% Ni-SiO2 catalyst and NaBH4 and in situ generation of Ni boride. The catalytic efficiency of Ni loading (5%, 10% and 15%) with silica or titania as support materials is investigated for reduction of nitrobenzene. The Ni-titania/NaBH4 system recorded lower conversion and selectivity. The IR studies indicate that silica support does not have free -OH group on its surface. Thus the nickel boride is anchored to the silica to facilitate the catalytic process.
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