高等学校化学学报

高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (9): 1025.

• 研究简报 • 上一篇    下一篇

峰宽法快速测定程序升温脱附活化能

龚健   

  1. 湖南师范大学化学系
  • 收稿日期:1989-01-28 出版日期:1990-09-24 发布日期:1990-09-24
  • 通讯作者: 龚健, 410081

Quick Determinating TPD Activation Energy by Peak Width Method

Gong Jian   

  1. Department of Chemistry, Hwum Normal University, Changsha
  • Received:1989-01-28 Online:1990-09-24 Published:1990-09-24

PDF (PC)

被引次数

7

摘要： TPD技术[1]已成为研究固体表面性质的重要手段,本文在总结前人工作的基础上考察了TPD谱峰峰宽和相应参数与脱附活化能(Ed)之间的变化规律,证明用任意峰宽法或半峰宽法测定Ed值有很好的实用性,该法直接运用TPD谱图参数,无需另外作图,故十分快速、简便,与其它方法比较,结果吻合。

关键词: 峰宽法, 快速测定, 脱附活化能

Abstract: Three equations to calculate activation energy of desorption (Ed) were obtained from Polan-gi-Wagner model and TPD profile,Ed=Rln(N1/N2)nT1T2/ΔT and Ed=0.02T1T2/ΔT1/2 (n=1) or Ed=0.03T1T2/ΔT1/2 (n=2) Ed values can be calculated quickly from TPD peak width ΔT and its corresponding parameters by using the three equations. Comparating with other methods, the results are consistent with each other.

Key words: Peak width method, Quick determination, TPD activation energy

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