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

01 October 2020, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


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.


monometallic LDH
Green rust
Mn basic salts
Water remediation
Nitrate reduction
Pourbaix diagram
Thermodynamic calculation


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