物理化学学报 >> 1998, Vol. 14 >> Issue (02): 164-168.doi: 10.3866/PKU.WHXB19980213

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Ni-P/SiO2催化剂晶化过程及其加氢活性研究

盛春, 周诗瑶, 李和兴, 邓景发   

  1. 上海师范大学实验中心，上海 200234|复旦大学化学系，上海 200433
  • 收稿日期:1997-06-03 修回日期:1997-08-20 发布日期:1998-02-15
  • 通讯作者: 邓景发

The Crystallization Process and the Hydrogenation Activity of Ni-P/SiO2 Catalyst

Sheng Chun, Zhou Shi-Yao, Li He-Xing, Deng Jing-Fa   

  1. Experimental Center,Shanghai Normal University,Shanghai 200234|Department of Chemistry,Fudan University,Shanghai 200433
  • Received:1997-06-03 Revised:1997-08-20 Published:1998-02-15
  • Contact: Deng Jing-Fa

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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．

关键词: Ni-P/SiO2非晶态催化剂, 苯甲醛, 催化加氢, 晶化

Abstract:

 The Ni-P amorphous alloy support on SiO2 (Ni-P/SiO2) was prepared by chemical reduction with NaH2PO2. The amorphous structure of the as-prepared sample was determined by XRD in which a broad peak around 2θ= 45℃ was observed. It's crystallization process was carried out by heating the sample at 350℃ and 600℃ in N2 flow for 2 hours, respectively. The as-prepared catalyst before and after crystallization was characterized by ICP, BET, XRD, XPS and SEM. The change of its catalytic activity before and after crystallization was measured through the liquid benzaldehyde(BA ) hydrogenation in term of the hydrogen uptake rate per gram or per area of nickel or the conversion of BA and TOF values. The change was discussed according to the above characterizations.

Key words: Ni-P/SiO2 amorphous catalyst, Benzaldehyde, Catalytic hydrogenation, Crystallization