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Journal of electrochemical science and technology   v.9 no.2, 2018년, pp.99 - 108   SCIE
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Effect of Electrolyte Concentration Difference on Hydrogen Production during PEM Electrolysis

Sun, Cheng-Wei   (Dept. of Mechanical Engineering, National Central University  ); Hsiau, Shu-San   (Dept. of Mechanical Engineering, National Central University  );
  • 초록

    Proton exchange membrane (PEM) water electrolysis systems offer several advantages over traditional technologies including higher energy efficiency, higher production rates, and more compact design. In this study, all the experiments were performed with a self-designed PEM electrolyser operated at 1 atm and $25^{\circ}C$ . Two types of electrolyte were used: (i) potassium hydroxide (KOH), and (ii) sulfuric acid ( $H_2SO_4$ ). In the experiments, the voltage, current, and time were measured. The concentration of the electrolyte significantly affected the electrolyser performance. Overall the best case was with 15 wt% $H_2SO_4$ at the anode channel and 20 wt% at the cathode channel with. In addition, increasing the difference in concentration of the sulfuric acid had an effect on the diffusion. The diffusion flux became larger when the difference in concentration became larger, increasing electrolyser efficiency without the addition of extra energy.


  • 주제어

    Proton exchange membrane electrolyser  . Electrolysis  . Electrolyte  . Diffusion  . Difference in concentration  .

  • 이미지/표/수식 (16)

    • The experimental parameters used in this study.

    논문관련 이미지

  • 참고문헌 (24)

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