NiB非晶态合金的制备及其催化水合肼还原硝基苯的性能

通过化学还原法制备了NiB非晶态合金催化剂，并将其用于水合肼还原硝基苯制备苯胺的反应。考察了硼/镍比、制备温度、KBH4溶液的pH值等对NiB催化活性的影响。结果表明，硼/镍摩尔比为2∶1，制备温度为-5℃，KBH4溶液的pH=12时，制备的NiB催化剂活性较高。在硝基苯10mmol，水合肼30mmol，无水乙醇15mL， NiB催化剂0.2 g，室温反应0.5 h的条件下，苯胺的收率为99%。

Preparation ofNiB Amorphous Alloy and its Performance in Reduction of Nitrobenzene with Hydrazine Hydrate

A series of amorphous NiB were prepared by the chemical reduction method, which were used in the reduction of nitrobenzene with hydrazine hydrate. The effects of the molar ratio of B/Ni, preparation temperature and the pH of KBH4 solution on the catalytic performance were investigated. The results showed that the suitable preparation conditions were as followed： the molar ratio of B/Ni 2：1, preparation temperature -5℃ and the pH of KBH4 solution 12. Under the conditions： 10 mmol of nitrobenzene, 30 mmol of hydrazine hydrate, 15 mL of ethanol, 0.2 g of NiB and reacting for 0.5 h at room temperature, the yield of aniline could reach 99%.