物理化学学报 >> 1985, Vol. 1 >> Issue (01): 32 -38 .doi: 10.3866/PKU.WHXB19850105

研究论文 上一篇    下一篇

红外光谱法研究表面溢出效应

盛太成*; 魏太广   

  1. 山东大学化学系
  • 收稿日期:1984-06-15 修回日期:1984-10-09 发布日期:1985-02-15
  • 通讯作者: 盛太成

INVESTIGATION OF HYDROGEN SPILLOVER IN THE Pt-NaY/HY SYSTEM BY IR SPECTROSCOPY

Sheng Taicheng*; Wei Taiguang   

  1. Department of Chemistry; Shandong University
  • Received:1984-06-15 Revised:1984-10-09 Published:1985-02-15
  • Contact: Sheng Taicheng

摘要:

采用红外光谱法, 利用重氢交换反应证明在Pt-NaY/HY体系有氢溢出(spillover)效应发生, 测量了100 ℃和50 ℃时的交换速率。发现在50 ℃时高频羟基的交换速率大于低频羟基。并对溢出机构进行了初步的讨论。

Abstract:

The hydrogen spillover effect of Pt-NaY/HY system has been studied using the exchange reaction of deuterium with hydroxyl groups by IR spectroscopy. The Pt-NaY catalyst used was prepared by impregnation of NaY zeolite with chloroplatinic acid. HY zeolite was prepared by NH_4~+ exchange of the same NaY zeolite followed by thermal decomposition. About 12.5% Pt metal dispersion and a Pt particle size of about 9.0 nm were determined from H_2 Chemisorption data at 0 ℃.
The wafer of HY zeolite used in the IR cell was mixed with a small amount of the catalyst in such a way that the Pt catalyst dispersed only around the periphery of the wafer.
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