Institutional Repository
Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/231D83E1-1B06-4B02-A288-6D4D0E716742 | ||
| Year | 2025 | ||
| Type of Item | Diploma Work | ||
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| Bibliographic Citation | Myrto Charitaki, "Synthesis and characterization of novel nano-structure manganese-nickel (Mn@Ni) electrodes for Hydrogen Evolution Reaction (HER) in alkaline electrolysis cells.", Diploma Work, School of Production Engineering and Management, Technical University of Crete, Chania, Greece, 2025 https://doi.org/10.26233/heallink.tuc.103565 | ||
| Appears in Collections |
In the ongoing effort to achieve the energy transition from high-emission energy production technologies to cleaner alternatives, hydrogen emerges as an energy carrier with significant potential. Among the various hydrogen production methods water electrolysis constitutes a particularly attractive option as it enables the generation of green hydrogen even through the use of renewable energy sources. However, in order for this method to become a truly competitive and viable solution, research on the development of more cost-effective and efficient electrocatalysts is imperative. This thesis focuses on the synthesis of novel nano-structured manganese-nickel foam (Mn@NF) electrodes and the investigation of their performance in alkaline electrolysis with particular emphasis on Hydrogen Evolution Reaction (HER). In the first chapter a review of hydrogen production technologies is presented with a focus on water electrolysis as well as the key individual half-reactions Hydrogen Evolution Reaction (HER) and Oxygen Evolution Reaction (OER). Subsequently, the fundamental thermodynamic and kinetic parameters of the reaction are analyzed and the materials and synthesis methods of electrocatalysts are discussed. The second chapter presents the electrode synthesis process, followed by the evaluation and comparison of their electrocatalytic performance. In the third and final chapter the study results are reported, highlighting the significance of the Ni/Mn ratio on the electrocatalytic behavior of the electrodes. Among the samples, the one with the Ni/Mn 1:3 ratio exhibited the overall best performance. Specifically, it demonstrated low charge transfer resistance, the highest double layer capacitance (Cdl) and the most favorable overall result in both HER and OER, indicating an increased electrochemically active surface area and enhanced electrocatalytic activity.
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