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Article

The Influence of the Electrodeposition Parameters on the Properties of Mn-Co-Based Nanofilms as Anode Materials for Alkaline Electrolysers

1
Faculty of Electronics, Telecommunications and Informatics, Gdansk University of Technology, ul. Narutowicza 11/12, 80-233 Gdansk, Poland
2
Department of Process Engineering and Chemical Technology, Chemical Faculty, Gdansk University of Technology, ul. Narutowicza 11/12, 80–233 Gdansk, Poland
3
International Centre of Electron Microscopy for Materials Science, Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, ul. A. Mickiewicza 30, 30-059 Krakow, Poland
4
Faculty of Applied Physics and Mathematics, Gdansk University of Technology, ul. Narutowicza 11/12, 80–233 Gdansk, Poland
*
Author to whom correspondence should be addressed.
Materials 2020, 13(11), 2662; https://doi.org/10.3390/ma13112662
Received: 21 May 2020 / Revised: 5 June 2020 / Accepted: 10 June 2020 / Published: 11 June 2020
In this work, the influence of the synthesis conditions on the structure, morphology, and electrocatalytic performance for the oxygen evolution reaction (OER) of Mn-Co-based films is studied. For this purpose, Mn-Co nanofilm is electrochemically synthesised in a one-step process on nickel foam in the presence of metal nitrates without any additives. The possible mechanism of the synthesis is proposed. The morphology and structure of the catalysts are studied by various techniques including scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and transmission electron microscopy. The analyses show that the as-deposited catalysts consist mainly of oxides/hydroxides and/or (oxy)hydroxides based on Mn2+, Co2+, and Co3+. The alkaline post-treatment of the film results in the formation of Mn-Co (oxy)hydroxides and crystalline Co(OH)2 with a β-phase hexagonal platelet-like shape structure, indicating a layered double hydroxide structure, desirable for the OER. Electrochemical studies show that the catalytic performance of Mn-Co was dependent on the concentration of Mn versus Co in the synthesis solution and on the deposition charge. The optimised Mn-Co/Ni foam is characterised by a specific surface area of 10.5 m2·g−1, a pore volume of 0.0042 cm3·g−1, and high electrochemical stability with an overpotential deviation around 330–340 mV at 10 mA·cm−2geo for 70 h. View Full-Text
Keywords: alkaline electrolyser; electrocatalyst; electrodeposition; energy material; nanofilm; nickel foam; oxygen evolution reaction alkaline electrolyser; electrocatalyst; electrodeposition; energy material; nanofilm; nickel foam; oxygen evolution reaction
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MDPI and ACS Style

Cysewska, K.; Rybarczyk, M.K.; Cempura, G.; Karczewski, J.; Łapiński, M.; Jasinski, P.; Molin, S. The Influence of the Electrodeposition Parameters on the Properties of Mn-Co-Based Nanofilms as Anode Materials for Alkaline Electrolysers. Materials 2020, 13, 2662. https://doi.org/10.3390/ma13112662

AMA Style

Cysewska K, Rybarczyk MK, Cempura G, Karczewski J, Łapiński M, Jasinski P, Molin S. The Influence of the Electrodeposition Parameters on the Properties of Mn-Co-Based Nanofilms as Anode Materials for Alkaline Electrolysers. Materials. 2020; 13(11):2662. https://doi.org/10.3390/ma13112662

Chicago/Turabian Style

Cysewska, Karolina, Maria K. Rybarczyk, Grzegorz Cempura, Jakub Karczewski, Marcin Łapiński, Piotr Jasinski, and Sebastian Molin. 2020. "The Influence of the Electrodeposition Parameters on the Properties of Mn-Co-Based Nanofilms as Anode Materials for Alkaline Electrolysers" Materials 13, no. 11: 2662. https://doi.org/10.3390/ma13112662

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