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LDH-final.pdf (3.81 MB)

Synthesis and Characterization of a New Monometallic Manganese Layered Double Hydroxide with Unique Redox Properties

preprint
submitted on 01.10.2020 and posted on 01.10.2020 by Damien Cornu, Romain Coustel, Aurélien Renard, Pierrick Durand, Cédric Carteret, Christian Ruby
Iron and cobalt monometallic Layered Double Hydroxide (LDH), combining divalent and trivalent cations of the same chemical element, are commonly used respectively for nitrate reduction and oxygen evolution reaction. This article reports the first synthesis of a LDH using only manganese
as metallic ion. X-Ray diffractograms, infrared and Raman spectra show that the structure obtained through the oxidation of a basic MnII salt with persulfate is comparable to the structure of Fe-LDH also known as Green Rust. XPS shows that in this solid coexist MnII and MnIII states. Thermodynamic considerations predict that this solid can reduce nitrate into gaseous nitrogen without further reduction
into ammonium or ammonia unlike what is observed for Fe-LDH.

History

Email Address of Submitting Author

damien.cornu@univ-lorraine.fr

Institution

Université de Lorraine, CNRS, LCPME, Nancy

Country

France

ORCID For Submitting Author

0000-0003-4426-2128

Declaration of Conflict of Interest

The Author(s) declare(s) that there is no conflict of interest.

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