Dehydration-rehydration characteristics of Nafion-H, Nafion-H supported on silica and Nafion-H silica nanocomposite catalysts studied by infrared microscopy

I. Pálinkó, B. Török, G. K.S. Prakash, G. A. Olah

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Dehydration-rehydration characteristics of Nafion-H, silica-supported Nafion-H and two types of Nation-H silica nanocomposites were studied by infrared microscopy working in the reflectance mode. The as received as well as the variously pretreated samples (evacuation at 298, 378 and 423 K) and the rehydrated samples were investigated in the mid IR range. Reversible changes in the OH region of the supported and the composite substances were observed depending on the temperature of pretreatment. Pretreatment at 423 K lead to more extensive changes in Nafion-H, i.e., to the loss of certain amount of -SO2OH groups through irreversible desulfonation/dehydroxylation.

Original languageEnglish
Pages (from-to)29-32
Number of pages4
JournalJournal of Molecular Structure
Volume482-483
DOIs
Publication statusPublished - May 25 1999

Keywords

  • Dehydration-rehydration
  • IR microscopy
  • Nafion-H
  • Nafion-H/SiO
  • Silica-embedded

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy
  • Organic Chemistry
  • Inorganic Chemistry

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