Self-healing for nanolayered manganese oxides in the presence of cerium( iv ) ammonium nitrate: new findings

The self-healing reactions for metal oxides are among the most important reactions. For Mn oxides in the presence of cerium( iv ) ammonium nitrate, Mn( ii ) and MnO 4 − combine and heal the Mn oxide. In the reaction, Mn( ii ) is formed from the reductive dissolution of the Mn oxide or by disproporti...

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Bibliographic Details
Published in:New journal of chemistry 2015-04, Vol.39 (4), p.2547-2550
Main Authors: Najafpour, Mohammad Mahdi, Khoshkam, Maryam, Jafarian Sedigh, Davood, Zahraei, Ali, Kompany-Zareh, Mohsen
Format: Article
Language:English
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Summary:The self-healing reactions for metal oxides are among the most important reactions. For Mn oxides in the presence of cerium( iv ) ammonium nitrate, Mn( ii ) and MnO 4 − combine and heal the Mn oxide. In the reaction, Mn( ii ) is formed from the reductive dissolution of the Mn oxide or by disproportionation of Mn( iii ) on the surface of the oxide. This Mn( ii ) is then oxidized by cerium( iv ) ammonium nitrate to MnO 4 − . The MnO 4 − in the presence of Mn oxide oxidizes water or in a second pathway is reduced by Mn( ii ) to form Mn oxide. Here, we use the multivariate curve resolution-alternative least squares method for the first time to analyze spectroscopic data and obtain concentration profiles of cerium( iv ) ammonium nitrate and MnO 4 − during the reaction under different conditions.
ISSN:1144-0546
1369-9261
DOI:10.1039/C4NJ02092H