ESR STUDY OF HYDROGEN SORPTION/DESORPTION KINETICS IN POLY(ORTHO-ANISIDINE) AND POA/SWNTs COMPOSITE FILMS

被引：0
|
作者：
Konchits, A. A. [1 ]
Kolesnik, S. P. [1 ]
Yefanov, V. S. [1 ]
Motsnyi, F. V. [1 ]
Tamburri, E. [2 ,3 ]
Terranova, M. -L. [2 ,3 ]
机构：
[1] NAS Ukraine, Inst Semicond Phys, 45 Pr Nauki, UA-03028 Kiev, Ukraine
[2] Univ Roma Tor Vergata, INFM, I-00133 Rome, Italy
[3] Univ Roma Tor Vergata, Dipartimento Sci & Technol Chim, I-00133 Rome, Italy
来源：
CARBON NANOMATERIALS IN CLEAN ENERGY HYDROGEN SYSTEMS | 2008年
关键词：
poly(ortho-anisidine); carbon nanotubes; electron spin resonance; polaron; hydrogen adsorption;
D O I：
暂无
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 cyclic hydrogen storage properties of poly(ortho-anisidine) (POA) and POA/SWNTs composite films have been investigated using the ESR spectroscopy. The ESR signals with g approximate to 2.0033 were observed in both types of the initial films for the first time. The temperature dependencies of ESR parameters suggest the polaron origin of the paramagnetic states in these films. A substantial effect due to oxygen, stored within the films, has been observed in the ESR response of composite films as well. A strong increase of the ESR signal has been detected for composite samples kept in hydrogen atmosphere at pressure of similar to 1.1 bar at room temperature. The less pronounced effect of hydrogen has been detected for the pure polymer films. The kinetics of the hydrogen adsorption - desorption processes in the samples was investigated and the results was interpreted in the frame of the hydrogen physisorption processes. The discussion of the H-induced effects in polymer and composite was carried out taking into account the morphology of the samples and the presence of paramagnetic defects.
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页码：241 / +
页数：3
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