Electrochemical water oxidation by simple manganese salts
- Electrochemical water oxidation by simple manganese salts
- 채근화; Sima Heidari; Jitendra Pal Singh; Hadi Feizi; Robabeh Bagheri; Zhenlun Song; Maasoumeh Khatamian; Mohammad Mahdi Najafpour
- Electrochemical water oxidation; manganese salts; catalyst; X-ray absorption spectroscopy; spectroelectrochemistry
- Issue Date
- Scientific Reports
- VOL 9-7749-12
- Recently, it has been great efforts to synthesize an efficient water-oxidizing catalyst. However, to find the true catalyst in the harsh conditions of the water-oxidation reaction is an open area in science. Herein, we showed that corrosion of some simple manganese salts, MnCO3, MnWO4, Mn3(PO4)2 · 3H2O, and Mn(VO3)2 · xH2O, under the water-electrolysis conditions at pH = 6.3, gives an amorphous manganese oxide. This conversion was studied with X-ray absorption spectroscopy (XAS), as well as, scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDXS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), spectroelectrochemistry and electrochemistry methods. When using as a water-oxidizing catalyst, such results are important to display that long-term water oxidation can change the nature of the manganese salts.
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