Electrochemical water oxidation by simple manganese salts

Title
Electrochemical water oxidation by simple manganese salts
Authors
채근화Sima HeidariJitendra Pal SinghHadi FeiziRobabeh BagheriZhenlun SongMaasoumeh KhatamianMohammad Mahdi Najafpour
Keywords
Electrochemical water oxidation; manganese salts; catalyst; X-ray absorption spectroscopy; spectroelectrochemistry
Issue Date
2019-05
Publisher
Scientific Reports
Citation
VOL 9-7749-12
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/70153
ISSN
2045-2322
Appears in Collections:
KIST Publication > Article
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