Experimental investigation on bubble growth and detachment characteristics on vertical microelectrode surface under electrode-normal magnetic field in water electrolysis

2021 ◽  
Author(s):  
Shuiqing Zhan ◽  
Yujie Huang ◽  
Wei Zhang ◽  
Bin Li ◽  
Mingmei Jiang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Experimental Investigation ◽  
Bubble Growth ◽  
Water Electrolysis ◽  
Normal Magnetic Field

Porous electrode improving energy efficiency under electrode-normal magnetic field in water electrolysis

2019 ◽  
Vol 44 (41) ◽  
pp. 22780-22786 ◽  
Author(s):  
Hong-bo Liu ◽  
Haotian Xu ◽  
Liang-ming Pan ◽  
Ding-han Zhong ◽  
Yang Liu
Keyword(s):  
Magnetic Field ◽  
Energy Efficiency ◽  
Porous Electrode ◽  
Water Electrolysis ◽  
Normal Magnetic Field

scholarly journals The effect of magnetic field on the dynamics of gas bubbles in water electrolysis

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yan-Hom Li ◽  
Yen-Ju Chen
Keyword(s):  
Magnetic Field ◽  
Swirling Flow ◽  
Gas Bubbles ◽  
Water Electrolysis ◽  
Platinum Electrodes ◽  
Optimal Layout ◽  
Parallel Magnetic Field ◽  
Hydrogen Bubbles ◽  
The Magnetic Field ◽  
Sluggish Flow

AbstractThis study determines the effect of the configuration of the magnetic field on the movement of gas bubbles that evolve from platinum electrodes. Oxygen and hydrogen bubbles respectively evolve from the surface of the anode and cathode and behave differently in the presence of a magnetic field due to their paramagnetic and diamagnetic characteristics. A magnetic field perpendicular to the surface of the horizontal electrode causes the bubbles to revolve. Oxygen and hydrogen bubbles revolve in opposite directions to create a swirling flow and spread the bubbles between the electrodes, which increases conductivity and the effectiveness of electrolysis. For vertical electrodes under the influence of a parallel magnetic field, a horizontal Lorentz force effectively detaches the bubbles and increases the conductivity and the effectiveness of electrolysis. However, if the layout of the electrodes and magnetic field results in upward or downward Lorentz forces that counter the buoyancy force, a sluggish flow in the duct inhibits the movement of the bubbles and decreases the conductivity and the charging performance. The results in this study determine the optimal layout for an electrode and a magnetic field to increase the conductivity and the effectiveness of water electrolysis, which is applicable to various fields including energy conversion, biotechnology, and magnetohydrodynamic thruster used in seawater.

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