Journal
SCIENTIFIC REPORTS
Volume 9, Issue -, Pages -Publisher
NATURE RESEARCH
DOI: 10.1038/s41598-019-44001-z
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- Institute for Advanced Studies in Basic Sciences
- National Elite Foundation
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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, Mn-3(PO4)(2) center dot 3H(2)O, and Mn(VO3)(2) center dot xH(2)O, 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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