| dc.description.abstract | Among the methods of hydrogen production, water electrolysis has many advantages, such as high efficiency, high purity in producing hydrogen, easy in use, etc., and thus becomes one of popular methods. During the process of releasing energy, hydrogen produces no green-house-effect gas and has potential as a energy carrier in the future.
In this study, we use ferromagnetism material (nickel), paramagnetism material (platinum), and diamagnetism material (graphite) as electrodes, respectively. Experimental set-up are modified to study the effects of working parameters, such as concentration of electrolyte, current, voltage, electrode distance and magnetic field on the water electrolyies. As water electrolysis is conduced with an electric field perpendicular to a magnetic field, Lorenz force will produce magnetohydrodynamic (MHD) convection and effect the gas bubble evolution.
At 25oC, water electrolysis is operated in a static, uniform magnetic field, which is superimposed perpendicular to the current direction in order to make upward and downward MHD convection. The results of experiment show that magnetization of ferromagnetism material is influenced greatly than the others by magnetic field.The maximum current density enhancement of ferromagnetism material(Ni) is about 14% , while it is about 14% for paramagnetism material(Pt) , The current density enhancement of diamagnetism material (C)is few.
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