| Autor: |
Biaobiao Zhang, Quentin Daniel, Lizhou Fan, Tianqi Liu, Qijun Meng, Licheng Sun |
| Jazyk: |
angličtina |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
iScience, Vol 4, Iss , Pp 144-152 (2018) |
| Druh dokumentu: |
article |
| ISSN: |
2589-0042 |
| DOI: |
10.1016/j.isci.2018.05.018 |
| Popis: |
Summary: Identifying surface active intermediate species is essential to reveal the catalytic mechanism of water oxidation by metal-oxides-based catalysts and to develop more efficient catalysts for oxygen-oxygen bond formation. Here we report, through electrochemical methods and ex situ infrared spectroscopy, the identification of a MnVII = O intermediate during catalytic water oxidation by a c-disordered δ-MnOx with an onset-potential-dependent reduction peak at 0.93 V and an infrared peak at 912 cm−1. This intermediate is proved to be highly reactive and much more oxidative than permanganate ion. Therefore, we propose a new catalytic mechanism for water oxidation catalyzed by Mn oxides, with involvement of the MnVII = O intermediate in a resting state and the MnIV−O−MnVII = O as a real active species for oxygen-oxygen bond formation. : Inorganic Chemistry; Surface Science; Energy Materials; Electrocatalysis Subject Areas: Inorganic Chemistry, Surface Science, Energy Materials, Electrocatalysis |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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