Isothermal decomposition of hydrogen peroxide dihydrate

M. J. Loeffler, R. A. Baragiola

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

We present a new method of growing pure solid hydrogen peroxide in an ultra high vacuum environment and apply it to determine thermal stability of the dihydrate compound that forms when water and hydrogen peroxide are mixed at low temperatures. Using infrared spectroscopy and thermogravimetric analysis, we quantified the isothermal decomposition of the metastable dihydrate at 151.6 K. This decomposition occurs by fractional distillation through the preferential sublimation of water, which leads to the formation of pure hydrogen peroxide. The results imply that in an astronomical environment where condensed mixtures of H 2O 2 and H 2O are shielded from radiolytic decomposition and warmed to temperatures where sublimation is significant, highly concentrated or even pure hydrogen peroxide may form.

Original languageEnglish (US)
Pages (from-to)5324-5328
Number of pages5
JournalJournal of Physical Chemistry A
Volume115
Issue number21
DOIs
StatePublished - Jun 2 2011
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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