以聚乙烯吡咯烷酮(PVP)为稳定剂,采用化学还原法制备了PVP-NiB非晶态催化剂,通过红外光谱、X射线衍射、透射电子显微镜和电感耦合等离子体光谱对催化剂进行了表征.结果表明,PVP不仅能够提高NiB纳米颗粒的分散度,而且对其起到稳定作用;将该催化剂首次应用于苯酚及其衍生物的催化加氢反应,在水相体系中,30°C及氢气压力0.2 MPa时,苯酚的转化率和环己醇的选择性都能够达到99.9%;酚类衍生物加氢反应结果发现,该催化剂有利于环己醇类物质的生成,初步考察了PVP-NiB非晶态催化剂的构效关系.

PVP‐NiB amorphous catalysts were prepared by the chemical reduction of nickel chloride with sodium borohydride, and characterized by infrared, X‐ray diffraction, transmission election microscopy, and inductively coupled plasma. The relationship between the catalytic activity and nature of the active sites was discussed. PVP is a protective agent for preparing PVP‐stabilized NiB catalysts, which improved the dispersion of the catalyst and stabilized its amorphous structure. The catalysis of phenol and its derivatives was evaluated in the aqueous phase. 99.9% conversion of phenol and 99.9% selectivity to cyclohexanol were obtained at 30 °C and 0.2 MPa H₂ after 18 h over PVP‐NiB. The generality of the PVP‐NiB catalyst for this reaction was demonstrated by the selective hydrogenation of other phenol derivatives, which showed that the PVP‐NiB catalyst was selective for the formation of cyclohexanol.