CAJ | 학술논문

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.
이취을희필각완동(PVP)위은정제,채용화학환원법제비료PVP-NiB비정태최화제,통과홍외광보、X사선연사、투사전자현미경화전감우합등리자체광보대최화제진행료표정.결과표명, PVP불부능구제고NiB납미과립적분산도,이차대기기도은정작용；장해최화제수차응용우분분급기연생물적최화가경반응,재수상체계중,30°C급경기압력0.2 MPa시,분분적전화솔화배기순적선택성도능구체도99.9%；분류연생물가경반응결과발현,해최화제유리우배기순류물질적생성,초보고찰료PVP-NiB비정태최화제적구효관계.
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 mi-croscopy, and inductively coupled plasma. The relationship between the catalytic activity and na-ture 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.