物理化学学报 >> 1998, Vol. 14 >> Issue (05): 439-443.doi: 10.3866/PKU.WHXB19980511

研究论文 上一篇    下一篇

Pt对Mo基催化剂还原-硫化过程的影响

于春英, 李文钊, 王军, 陈燕馨, 张盈珍   

  1. 中国科学院大连化学物理研究所,大连 116023
  • 收稿日期:1997-08-08 修回日期:1998-01-06 发布日期:1998-05-15
  • 通讯作者: 于春英

Effect of Supported Pt on Reduction and Sulfidation of Mo Based Catalysts

Yu Chun-Ying, Li Wen-Zhao, Wang Jun, Chen Yan-Xin, Zhang Ying-Zhen   

  1. Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023
  • Received:1997-08-08 Revised:1998-01-06 Published:1998-05-15
  • Contact: Yu Chun-Ying

摘要:

采用脉冲硫化、连续硫化、程序升温还原、程序升温及程序降温电导及X射线衍射等方法研究了贵金属Pt对MoO3催化剂还原-硫化过程的影响及Pt对MOS2配位不饱和活性中心形成的影响.结果表明,Pt担载在MoO3上可以促进MoO3的还原-硫化,使MoO3的还原-硫化温度大大降低. Pt担载在MoSw上可促进MoS2的部分还原形成配位不饱和的钼中心

关键词: MoO3, Pt/MoO3, TPR, XRD, 电导

Abstract:

 Effect of supported Pt on reduction and sulfidation for Pt/MoO3 and Pt/MOS2 catalysts were studied by pulse reduction-sulfidation, flow reduction-sulfidation, temperature programmed electrical conductivity, temperature programmed reduction technique and X ray diffraction analysis. It was found that, for Pt/MoO3 the addition of Pt greatly promoted the reduction and sulfidation of MoO3, it was also shown that, for Pt/MoS2 Pt obviously facilitated the reduction of MoS2 to form S-vacancy, leading to an increment of the concentration of coordinative unsaturated molybdenum.

Key words: MoO3, Pt/MoO3, TPR, XRD, Electrical conductivity