Proton mobility in H-ZSM5 studied by impedance spectroscopy

被引：63

作者：

Franke, ME ^{[1
]}

Simon, U ^{[1
]}

机构：

[1] Univ Essen Gesamthsch, Inst Inorgan Chem, D-45127 Essen, Germany

来源：

SOLID STATE IONICS | 1999年 / 118卷 / 3-4期

关键词：

impedance spectroscopy; zeolites; proton mobility; hopping conductivity;

D O I：

10.1016/S0167-2738(98)00436-6

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：

The electrical properties of dehydrated zeolite H-ZSM5 with different SiO2/Al2O3 ratios (30, 50, 80, 150, 280, and 1000) were examined by complex impedance spectroscopy. We determined the activation energy for proton relaxation, which depends an the spatial distance of the aluminum sites. Classical hopping theory as well as Debye-Huckel theory are in agreement with the experimental data implying that the relaxation originates from translational proton hopping instead of local reorientational motion, as assumed from H-1-MAS-NMR as well as from quantum-chemical calculations. (C) 1999 Elsevier Science BN; All rights reserved.

引用

页码：311 / 316

页数：6