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Low voltage H2O electrolysis for enhanced hydrogen production

Author

Listed:
  • Mbah, Jonathan
  • Weaver, Eric
  • Srinivasan, Sesha
  • Krakow, Burton
  • Wolan, John
  • Goswami, Yogi
  • Stefanakos, Elias

Abstract

In this study, we report the ability to split H2O into hydrogen at a reduced voltage by the influence of sulfur dioxide (SO2) and anode tolerance materials. This will improve the energy consumption for the production of hydrogen. Hydrogen is produced at the cathode while the anode electrode is bathed in sulfur dioxide and water to form sulfuric acid by the application of potential in the form of electrical energy. In the presence of SO2, the theoretical equilibrium voltage requirement is 0.19 V, thereby reducing the thermochemical free energy to less than one-sixth of its initial value, that is, from 56 to 9.18 kcal/mole. By using SO2 to scavenge the anode we have in practice reduced the equilibrium voltage to 0.6 V. Based on different electrode configurations, ruthenium oxide (RuO2) electrocatalyst deposited on silicon (Si) electrode exhibited superior performance for the low voltage H2O electrolysis.

Suggested Citation

  • Mbah, Jonathan & Weaver, Eric & Srinivasan, Sesha & Krakow, Burton & Wolan, John & Goswami, Yogi & Stefanakos, Elias, 2010. "Low voltage H2O electrolysis for enhanced hydrogen production," Energy, Elsevier, vol. 35(12), pages 5008-5012.
    • Handle: RePEc:eee:energy:v:35:y:2010:i:12:p:5008-5012
    DOI: 10.1016/j.energy.2010.08.021
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    Cited by:

    1. Nong, Guangzai & Li, Ming & Chen, Yiyi & Zhou, Zongwen & Wang, Shuangfei, 2015. "Simulation of energy conversion in a plant of photocatalysts water splitting for hydrogen fuel," Energy, Elsevier, vol. 81(C), pages 471-476.
    2. Sequeira, C.A.C. & Santos, D.M.F. & Brito, P.S.D., 2011. "Electrocatalytic activity of simple and modified Fe–P electrodeposits for hydrogen evolution from alkaline media," Energy, Elsevier, vol. 36(2), pages 847-853.
    3. Luo, Yu & Shi, Yixiang & Li, Wenying & Cai, Ningsheng, 2014. "Comprehensive modeling of tubular solid oxide electrolysis cell for co-electrolysis of steam and carbon dioxide," Energy, Elsevier, vol. 70(C), pages 420-434.
    4. Sakr, I.M. & Abdelsalam, Ali M. & El-Askary, W.A., 2017. "Effect of electrodes separator-type on hydrogen production using solar energy," Energy, Elsevier, vol. 140(P1), pages 625-632.
    5. Gong, Xuzhong & Wang, Mingyong & Liu, Yang & Wang, Zhi & Guo, Zhancheng, 2014. "Variation with time of cell voltage for coal slurry electrolysis in sulfuric acid," Energy, Elsevier, vol. 65(C), pages 233-239.
    6. Ravichandran, S. & Venkatkarthick, R. & Sankari, A. & Vasudevan, S. & Jonas Davidson, D. & Sozhan, G., 2014. "Platinum deposition on the nafion membrane by impregnation reduction using nonionic surfactant for water electrolysis – An alternate approach," Energy, Elsevier, vol. 68(C), pages 148-151.
    7. Santos, D.M.F. & Šljukić, B. & Sequeira, C.A.C. & Macciò, D. & Saccone, A. & Figueiredo, J.L., 2013. "Electrocatalytic approach for the efficiency increase of electrolytic hydrogen production: Proof-of-concept using platinum--dysprosium alloys," Energy, Elsevier, vol. 50(C), pages 486-492.
    8. El-Askary, W.A. & Sakr, I.M. & Ibrahim, K.A. & Balabel, A., 2015. "Hydrodynamics characteristics of hydrogen evolution process through electrolysis: Numerical and experimental studies," Energy, Elsevier, vol. 90(P1), pages 722-737.

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