Acta Phys. -Chim. Sin. ›› 1998, Vol. 14 ›› Issue (02): 164-168.doi: 10.3866/PKU.WHXB19980213

• ARTICLE • Previous Articles     Next Articles

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

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