Ni-P/SiO_2催化剂晶化过程及其加氢活性研究  

The Crystallization Process and the Hydrogenation Activity of Ni-P/SiO_2 Catalyst

作　　者：盛春[1] 周诗瑶[1] 李和兴[2] 邓景发[2] 

机构地区：[1]上海师范大学实验中心,上海200234 [2]复旦大学化学系,上海200433

出　　处：《物理化学学报》1998年第2期164-168,共5页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金;中国石油化工公司联合资助

摘　　要：采用化学还原法制备了负载型Ni－P／SiO2非晶态合金催化剂．应用ICP、BET、氢氧滴定法、XRD、SEM、XPS研究了上述催化剂在高温晶化过程中的表面结构、表面形貌和表面电子态的变化。测定了Ni－P／SiO2非晶态合金晶化前后对其液相苯甲醛加氢反应催化活性和选择性,并讨论了非晶态合金催化剂晶化过程中结构变化对催化性能的影响．The Ni-P amorphous alloy support on SiO2 (Ni-P/SiO2) was prepared by chemicalreduction with NaH2PO2. The amorphous structure of the as-prepared sample was determined byXRD in which a broad peak around 2 = 45 was observed. It's crystallization process was carriedout by heating the sample at 350℃ and 600℃ in N2 flow for 2 hours. respectively. The as- prepared catalys before and after crystallization was characteriaed by ICP,BET,XRD,XPS and SEM. The change of its calalytic activity before and after crystallization was measured throughthe liquid benzaldehyde(BA ) hydrogenation in term of the hydrogen uptake rate per gram or perarea of nickel or the conversion of BA and TOF values. The change was discussed according tothe above characterizations.

关 键 词：镍 磷 催化剂 苯甲醛 加氢 二氧化硅 非晶态合金 

分 类 号：O643.36[理学—物理化学] O625.41[理学—化学]