NiB/C催化剂的制备及其在合成对氨基苯酚中的应用

Preparation of NiB/C Catalyst and Its Application in the Synthesis of p-Aminophenol

采用化学还原法制备了NiB/C催化剂,利用电感耦合等离子直读光谱(ICP)、X-射线衍射(XRD)、扫描电镜(SEM)和差示扫描量热分析(DSC)等表征手段对其组成、结构、形貌及最高晶化温度进行了分析,对硫酸锌水溶液中硝基苯催化加氢制备对氨基苯酚(PAP)的反应及其催化性能进行了研究。表征结果显示,NiB/C催化剂中非晶态NiB合金的组成为Ni79.4B20.6,最高晶化温度为643K,合金颗粒粒度约为30nm。实验结果表明,硫酸锌溶液中硝基苯催化加氢反应硝基苯转化率为80.23%,对氨基苯酚选择性为11.21%,NiB/C催化剂具有较高的催化加氢活性。

A NiB/C catalyst was prepared by a chemical reduction method,and characterized by inductively coupled plasma direct-reading spectrometer（ICP）,X-ray diffraction（XRD）,scanning electron microscopy（SEM） and differential scanning calorimetry（DSC） techniques.Its catalytic properties were investigated by the reaction of catalytic hydrogenation of nitrobenzene to p-aminophenol（PAP）.The characterization result suggests the composition of the amorphous NiB alloy is Ni79.4B20.6,the highest crystallization temperature is 643 K and the alloy particle size is about 30 nm.Nitrobenzene conversion of 80.23%,PAP yield of 11.21% was obtained.The results show that NiB/C catalyst had high catalytic activity on the reaction of catalytic hydrogenation of nitrobenzene.