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Synthesis, characterization and in situ monitoring of the mechanochemical reaction process of two manganese(II)-phosphonates with N-containing ligands

Authors :
Klaus Rademann
Manuel Wilke
Ana Guilherme Buzanich
Irina Akhmetova
Christina Roth
Konstantin Schutjajew
Franziska Emmerling
Source :
Journal of Materials Science
Publication Year :
2018

Abstract

Two divalent manganese aminophosphonates, manganese mono(nitrilotrimethylphosphonate) (MnNP3) and manganese bis(N-(carboxymethyl)iminodi(methylphosphonate)) (Mn(NP2AH)2), have been prepared by mechanochemical synthesis and characterized by powder X-ray diffraction (PXRD). The structure of the novel compound Mn(NP2AH)2 was determined from PXRD data. MnNP3 as well as Mn(NP2AH)2 exhibits a chain-like structure. In both cases, the manganese atom is coordinated by six oxygen atoms in a distorted octahedron. The local coordination around Mn was further characterized by extended X-ray absorption fine structure. The synthesis process was followed in situ by synchrotron X-ray diffraction revealing a three-step reaction mechanism. The as-prepared manganese(II) phosphonates were calcined on air. All samples were successfully tested for their suitability as catalyst material in the oxygen evolution reaction.

Details

ISSN :
00222461
Database :
OpenAIRE
Journal :
Journal of Materials Science
Accession number :
edsair.doi.dedup.....d0ce3f483c6951abdfd3a6832b57be17
Full Text :
https://doi.org/10.1007/s10853-018-2608-6