Chemical state of the surface of mechanically activated MnmOn oxides
X-ray photoelectron spectroscopy is used to study Mn 3 O 4 , Mn 2 O 3 , and MnO 2 manganese oxide surfaces subjected to mechanical activation by means of high intensity grinding. It is found that Mn 2 O 3 is the most thermodynamically stable of these oxides; mechanical activation converts the surfac...
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| Veröffentlicht in: | Journal of applied spectroscopy 2011-05, Vol.78 (2) |
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| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | X-ray photoelectron spectroscopy is used to study Mn
3
O
4
, Mn
2
O
3
, and MnO
2
manganese oxide surfaces subjected to mechanical activation by means of high intensity grinding. It is found that Mn
2
O
3
is the most thermodynamically stable of these oxides; mechanical activation converts the surface layers of Mn
3
O
4
and MnO
2
into this intermediate oxide. The chemical stability of activated Mn
2
O
3
with respect to actions of the environment was considerably elevated. This result is explained in terms of features of the structural state of the mechanically activated surface. |
|---|---|
| ISSN: | 0021-9037 1573-8647 |
| DOI: | 10.1007/s10812-011-9453-6 |