FTIR investigation on Wells-Dawson and Keggin type heteropolyacids: dehydration and ethanol sorption

被引：59

作者：

Bielanski, A

Lubanska, A

机构：

[1] PAN, Inst Catalysis & Surface Chem, PL-30239 Krakow, Poland

[2] Jagiellonian Univ, Dept Chem, PL-30060 Krakow, Poland

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2004年 / 224卷 / 1-2期

关键词：

heteropolyacid; Dawson; Keggin; dehydration; ethanol sorption;

D O I：

10.1016/j.molcata.2004.08.047

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 FTIR spectra of Wells-Dawson and Keggin type heteropolyacids, H6P2W18O62 and H3PW12O40, respectively, were registered in the course of their dehydration at temperatures between room temperature and 300-350degreesC as well as during the sorption of ethanol on dehydrated and and/or dehydroxylated samples. The changes on heating in the secondary structure of the samples were observed and discussed. Ethanol adsorbed on dehydrated heteropolyacid gets protonated and participates in the formation of secondary structure of heteropolyacid. In the case of dehydroxylated acids physical sorption of ethanol is only observed. (C) 2004 Elsevier B.V. All rights reserved.

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页码：179 / 187

页数：9

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