Manganese Phosphide

manganese phosphide is a hard and durable coating that improves performance in a variety of industries. It is typically used for metal parts that operate in demanding applications and require extra wear-resistance and toughness.

In addition to its durability, manganese phosphate is also a popular choice for finishing metal parts because it is insoluble and increases the surface of the part’s crystalline finish. It also helps reduce the amount of corrosion and enhances lubrication.


Generally, organic templates are used to synthesize layered manganese phosphates by solvothermally or hydrothenmally forming a two-dimensional layer of manganese phosphate with the organic template sandwiched between the two layers. The ammonium groups of the organic template are hydrogen bonded to the manganese phosphate layer by the water molecules (see FIG. 1).

The inorganic manganese phosphate layer is surrounded by two layers of triply protonated TREN molecules with their ammonium groups pointing inwards, and a third layer of bilayer water molecules. The bridging O2 and O3 atoms are bonded to the manganese phosphate, but the terminal O4 is not.

MnPi is a 3D superstructure with asymmetric out-of-plane Mn centers that are accessible and preferential oxidation sites for MnII/III oxidation to form active intermediates in neutral aqueous solutions, as demonstrated by structural, spectrometric, and electrochemical studies. The asymmetric geometry of the Mn centres allows for J-T distortion to be tolerated and stabilizes the key MnIII intermediate in the MnPi.

These properties make manganese phosphide an excellent material for developing high-performance catalysts that perform in challenging chemical processes. Moreover, the manganese phosphide structure can be tailored for specific applications and the resulting coating is highly resistant to corrosive environments.