The study of mixed transition metal oxido cubane complexes is crucial to the development of materials for oxygen evolution reaction, oxygen reduction reaction, and energy storage. A discreet series of heterometallic trimanganese-tetraoxido cubanes (MMn3O4 ; M = Fe, Co, Ni, Cu) supported by a trisalkoxy-hexapyridyl ligand with a 1,3,5-triarylbenzene spacer were synthesized and characterized  by single crystal X-ray diffraction, dispersive difference diffraction analysis, cyclic voltammetry, M�ssbauer spectroscopy, and X-ray absorption spectroscopy. To determine their potential as precursors for heterogeneous water oxidation electrocatalysts, these well-defined complexes were drop-casted on electrodes, and electrolysis of the material was performed in basic aqueous media. Oxygen evolution was observed, and the activity was compared to a few other mixed metal oxide electrocatalysts reported in literature. Electrolysis of MMn3O4 resulted in the different ratio of M to Mn in the final material depending on the metal M (M = Co, Ni) as characterized by X-ray photoelectron spectroscopy and energy dispersive X-ray spectroscopy. X-ray absorption spectroscopy shows the retention of the cubane moiety in the post-electrolysis NiMn3O4 materials.

Synthesis of mixed-metal transition metal oxido cubanes (MMn<sub>3</sub>O<sub>4</sub>) and their potential as prescursors for water oxidation electrocatalysts

248th National Meeting (2014)

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Synthesis of mixed-metal transition metal oxido cubanes (MMn3O4) and their potential as prescursors for water oxidation electrocatalysts

Synthesis of mixed-metal transition metal oxido cubanes (MMn₃O₄) and their potential as prescursors for water oxidation electrocatalysts