Tuning the oxidation degree in sub-10 nm silver-oxide nanoparticles: From Ag2O monoxide to AgOx(x > 1) superoxide

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Abstract

A preparation method for silver-oxide containing nanoparticles is described. The suggested approach allows varying the oxidation degree from monoxide to an oxygen-rich state resembling superoxide The method is based on magnetron reactive sputtering and vapour aggregation, and utilizes silver-oxygen interaction in the vapour phase - prior to the nanoparticle aggregation from the vapour. Synchrotron-based photoelectron spectroscopy - a local probing method with high chemical sensitivity - allows 'on-the-fly' analysis of the composition and oxidation degree in nanoparticles, before any deposition of the particles. Preparation and properties of oxygen-rich nanoparticles are discussed in connection to the catalytic processing of economically important hydrocarbons. (C) 2014 Elsevier B.V. All rights reserved.

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  • Physical Sciences
  • Natural Sciences
Original languageEnglish
Pages (from-to)96-102
JournalChemical Physics Letters
Volume600
Publication statusPublished - 2014
Publication categoryResearch
Peer-reviewedYes