P-31 solid state NMR and ESR investigation of trimethylphosphane adsorption on zirconia and sulfated zirconia

被引：32

作者：

Riemer, T ^{[1
]}

Knozinger, H ^{[1
]}

机构：

[1] UNIV MUNICH,INST PHYS CHEM,D-80333 MUNICH,GERMANY

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1996年 / 100卷 / 16期

关键词：

D O I：

10.1021/jp9534287

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

P-31 MAS NMR spectra of trimethylphosphane (TMP) adsorbed on monoclinic zirconia (ZrO2) and on tetragonal sulfated zirconia (ZrO2-S) were measured. The P-31 NMR spectra show that protonic acidity, which does not exist on ZrO2, is induced on ZrO2-S. Lewis acid centers on ZrO2-S are stronger than those on ZrO2. The formation of trimethylphosphane oxide was also detected, indicating oxidizing properties of ZrO2-S that sulfate-free ZrO2 does not possess. ESR spectra suggest the formation of SO3- radical anions during TMP oxidation.

引用

页码：6739 / 6742

页数：4

共 27 条

[21] MEASUREMENT OF SURFACE-ACIDITY BY P-31 NMR OF ADSORBED TRIMETHYLPHOSPHINE - APPLICATION TO VAPOR-DEPOSITED SIO2 ON AL2O(3) MONOLAYER CATALYSTS [J].