Self-healing for nanolayered manganese oxides in the presence of cerium(iv) ammonium nitrate: new findings. (22nd January 2015)

• Record Type: Journal Article
• Authors: Najafpour, Mohammad Mahdi; Khoshkam, Maryam; Jafarian Sedigh, Davood; Zahraei, Ali; Kompany-Zareh, Mohsen
• Is Part Of: New journal of chemistry. Volume 39:Number 4(2015:Apr.)
• Page Start: 2547
• Page End: 2550
• Publication Date: 2015-01-22
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c4nj02092h
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : We used multivariate chemometrics methods to analyze the concentration profiles of cerium(iv ) ammonium nitrate and MnO4 − during the water oxidation reaction. Abstract : 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 MnO4 − 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 MnO4 − . The MnO4 − 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 MnO4 − during the reaction under different conditions.