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Synthesis of manganese oxide electrocatalysts in supercritical carbon dioxide


In this work, a novel method of preparing manganese oxide nanoparticles from an organometallic precursor dissolved in supercritical carbon dioxide (sc CO2) was presented. Using the new approach, nanomaterials mostly consisting of manganese oxides in β-MnO2 and ε-MnO2 phases with small-sized (~ 40 nm) grains and low polydispersity index (~ 0.12) can be synthesized, which was consistently proved by means of thermogravimetric and X-ray diffraction analysis, scanning and transmission electron microscopy. Moreover, reasonable electrocatalytic activity of the obtained materials was detected by a rotating disk electrode method.

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The authors are grateful to Professor G.A. Tsirlina from the Lomonosov Moscow State University for her valuable guidance in electrochemical experiments and discussion of the results. Research reported in this publication (in the parts of V.V.Z., S.S.A, M.S.K., M.O.G contributions) was supported by Centre for Electrochemical Energy of Skolkovo Institute of Science and Technology.

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Zefirov, V.V., Elmanovich, I.V., Levin, E.E. et al. Synthesis of manganese oxide electrocatalysts in supercritical carbon dioxide. J Mater Sci 53, 9449–9462 (2018).

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  • Manganese Oxide
  • Organometallic Precursors
  • Rotating Disk Electrode Method
  • Carbon Binding
  • Cyclopentadienylmanganese Tricarbonyl