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energies Article Research on Hydrogen Production by Water Electrolysis Using a Rotating Magnetic Field Hao Guo 1,2 , Hyeon-Jung Kim 1 and Sang-Young Kim 1,* 1 School of Mechanical Engineering, Kunsan National University, Gunsan-si 54150, Jeollabuk-do, Republic of Korea School of Engineering, Jilin Business and Technology College, Changchun 130507, China Citation: Guo, H.; Kim, H.-J.; Kim, S.-Y. Research on Hydrogen Production by Water Electrolysis Using a Rotating Magnetic Field. Energies2023,16,86. https:// doi.org/10.3390/en16010086 Academic Editors: Asif Ali Tahir and Andrzej Teodorczyk Received: 14 November 2022 Revised: 15 December 2022 Accepted: 19 December 2022 Published: 21 December 2022 Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). Abstract: In this paper, the effect of rotating magnetic fields on hydrogen generation from water elec- trolysis is analyzed, aiming to provide a research reference for hydrogen production and improving hydrogen production efficiency. The electrolytic environment is formed by alkaline solutions and special electrolytic cells. The two electrolytic cells are connected to each other in the form of several pipes. The ring magnets are used to surround the pipes and rotate the magnets so that the pipes move relative to the magnets within the ring magnetic field area. Experimentally, the electrolysis reaction of an alkaline solution was studied by using a rotating magnetic field, and the effect of magnetic field rotation speed on the electrolysis reaction was analyzed using detected voltage data. The experimental phenomenon showed that the faster the rotation speed of the rotating magnetic field, the faster the production speed of hydrogen gas. Keywords: water electrolysis; hydrogen; rotating magnetic field; induced voltage; ion migration 1. Introduction With the development of society and the progress of technology, people’s demand for energy is increasing. Traditional energy resources are no longer enough to support the development of modern people, so people have started to develop renewable energy manufacturing technologies. Among them, hydrogen energy is the main object of current research in renewable energy and is a common focus of scientists from various countries [1]. There are many ways to produce hydrogen, among which water electrolysis to produce hydrogen is the most widely used. In order to improve the efficiency of water electrolysis reactions, researchers have come up with a variety of solutions. Electrolytic water tech- nology is currently available in three main electrolytic cell technologies: alkaline water electrolysis (AWE), proton exchange membrane electrolysis (PEM), and solid oxide electrol- ysis (SOEC) [2]. Both AWE and PEM are technologies that have been studied more deeply under low temperature conditions; however, SOEC technology is still in the development stage [3]. Compared with the other two technologies, AWE has the advantages of lower cost and longer lifetime [4–7]. Thus, AWE is the most widely applied technology today. Dohyung Jang et al. [8] pointed out that the effect of electrode overvoltage could be controlled by controlling the pressure of alkaline water electrolysis to enhance the efficiency of alkaline water electrolysis. Frank Allebrod et al. [9] analyzed the effect of temperature on the rate of hydro- gen production when performing water electrolysis. As the temperature increases, the impedance decreases and the current density increases. This results in an increase in the rate of hydrogen production. N. A. Burton et al. [10] proposed a method to improve the efficiency of solar water electrolysis for hydrogen production. Further research on enhanced solar-hydrogen hybrid coupling technology, the application of magnetic fields, the application of light energy, the 2 * Correspondence: sangyoungkim@kunsan.ac.kr; Tel.: +82-063-469-4873 Energies 2023, 16, 86. https://doi.org/10.3390/en16010086 https://www.mdpi.com/journal/energiesPDF Image | H2 from Water Electrolysis Using a Rotating Magnetic Field
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