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Issue 17, 2001
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The thermal decomposition of silver (I, III) oxide: A combined XRD, FT-IR and Raman spectroscopic study

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Abstract

FT-IR and Raman spectra for polycrystalline powders of silver (I, III) oxide, AgO, and silver (I) oxide, Ag2O, are reported. The vibrational spectra for each oxide are discussed in relation to its crystal structure, and were found to be consistent with factor group analysis predictions. Infrared and Raman spectroscopy, in conjunction with powder XRD, were also used to follow the thermal decomposition of AgO powder in air. Supplementary studies employing differential scanning calorimetry (DSC) and temperature programmed reaction (TPR), provided additional information relevant to the decomposition process. In agreement with mechanisms previously reported, AgO was thermally reduced to metallic silver [italic v (to differentiate from Times ital nu)]ia two non-reversible steps, with the intermediate formation of Ag2O. The transformation of AgO to Ag2O occurred with heating in the 373–473 K region, while the product of this reaction remained stable to temperatures in excess of 623 K. Complete thermal decomposition of the Ag2O intermediate to Ag and O2 occurred at 673 K.

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Publication details

The article was received on 10 Apr 2001, accepted on 19 Jun 2001 and first published on 23 Jul 2001


Article type: Paper
DOI: 10.1039/B103226G
Citation: Phys. Chem. Chem. Phys., 2001,3, 3838-3845
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    The thermal decomposition of silver (I, III) oxide: A combined XRD, FT-IR and Raman spectroscopic study

    G. I. N. Waterhouse, G. A. Bowmaker and J. B. Metson, Phys. Chem. Chem. Phys., 2001, 3, 3838
    DOI: 10.1039/B103226G

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