利用脈衝與多電極在酸鹼質子交換膜水電解的效率之分析;The analysis of efficiency on the acido-alkaline proton exchange membrane water electrolysis by using multi-electrode and pulse

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题名:	利用脈衝與多電極在酸鹼質子交換膜水電解的效率之分析;The analysis of efficiency on the acido-alkaline proton exchange membrane water electrolysis by using multi-electrode and pulse
作者:	伍偉華;Wu, Wei-Hua
贡献者:	能源工程研究所
关键词:	電解水;質子交換膜;多電極;脈衝;產氫;water electrolysis;proton exchange membrane;multi-electrode;pulse;hydrogen production
日期:	2018-08-21
上传时间:	2018-08-31 14:17:14 (UTC+8)
出版者:	國立中央大學
摘要:	實驗利用多組鎳電極，於氫氧化鉀和硫酸電解液，加入脈衝下進行質子交換膜電解水產氫(PEMWE)，由恆電位儀量測相關數據，探討不同電壓值、電極組數、脈衝時間、週期，基礎電位與電流的關係，利用酸和鹼電解液在PEMWE下可以降低電解電壓到0.7V，並且提升產氫的效率;多電極降低整體的電阻阻抗，進而提升能源效率，最後再加入脈衝後，使得瞬間電流值會增加、產生的氫氣迅速脫離電極表面、加速離子的擴散速度，降低電極上的極化現象，進而提升產氫的效率以及節能的效果。加入脈衝量測後，在電極間距10mm，酸與鹼濃度在30wt%、頻率為100Hz時，在4V的能源效率比未加入脈衝時提升了約15%，而五組電極在2V有著較好的效率，增加達到98.6%的能源效率。 ;In this experiment, multiple sets of nickel electrodes were used to produce hydrogen by proton exchange membrane water electrolysis (PEMWE) under the action of pulses and potassium hydroxide and sulfuric acid electrolytes. The relevant data were measured by potentiostat, and effects of applied voltage, number of electrode groups,base potential and pulses on the efficiency were investigated. Results show that dual cells and electrolytes can reduce the electrolysis voltage to 0.7V, and improve the efficiency of hydrogen production. Multi-electrode reduces the overall resistance and impedance, thereby improves the energy efficiency. finally as the pulse is added, the instantaneous current value is increased, and the generating hydrogen gas deviates rapidly from the surface of the electrode, accelerates the diffusion speed of the ions, and reduces the polarization phenomenon on the electrode. The efficiency of hydrogen production is thus improved. As the electrode spacing is 10 mm, the acid and alkali concentration is 30% by weight, and the frequency is 100Hz, The energy efficiency at 4V is about 15% higher than no pulse is used. and five groups of electrodes at 2V have the best efficiency of 98.6%.
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