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Disordered surface layers of metal sulfides and their reactivity

  • Proceedings of the Topical Meeting of the European Ceramic Society “Structural Chemistry of Partially Ordered Systems, Nanoparticles, and Nanocomposites” (St. Petersburg, Russia, June 27–29, 2006)
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Abstract

The surface of metal sulfides during reactions of oxidation and corrosion in aqueous solutions is investigated using X-ray photoelectron spectroscopy, X-ray spectroscopy, Mössbauer spectroscopy, scanning electron microscopy, and scanning probe microscopy. Primary attention is focused on the state of the surface layer of the sulfide phase. It is demonstrated that the composition of this layer is changed in such a way that there arises a metal deficiency (as a rule, rather substantial) and the structure becomes disordered. Experimental evidence that the surface layer can be considered a chalcogenide glassy semiconductors is discussed. The role of the localization of electronic states and specific defects in the reactivity of sulfides, particularly in oxidation and acid dissolution, is analyzed.

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Authors and Affiliations

  1. Institute of Chemistry and Chemical Technology, Siberian Division, Russian Academy of Sciences, ul. Karla Marksa 42, Krasnoyarsk, 660049, Russia

    Yu. L. Mikhlin

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Original Russian Text © Yu.L. Mikhlin, 2007, published in Fizika i Khimiya Stekla.

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Mikhlin, Y.L. Disordered surface layers of metal sulfides and their reactivity. Glass Phys Chem 33, 402–410 (2007). https://doi.org/10.1134/S1087659607040153

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