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Experimental investigation and assessment of a new direct urea-hydrogen peroxide fuel cell stack

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  • Meke, Ayse Sinem
  • Dincer, Ibrahim

Abstract

This study addresses the existing technology gaps in fuel cell development by investigating the design and performance assessment of a Direct Urea-Hydrogen Peroxide Fuel Cell (DUHPFC) stack. A significant focus was placed on the preparation of electrodes, where nickel zinc iron oxide was successfully deposited on stainless steel foil via electrodeposition, resulting in high-activity, stable anodes. The 16-cell fuel cell stack was tested under various conditions, with optimal performance observed at 65 °C, achieving a power output of 0.307 kW and an open circuit voltage (OCV) of 8.8 V. The energy and exergy efficiencies at 65 °C were determined to be 48.88 % and 41.27 %, respectively, highlighting the crucial role of temperature optimization for better performance. The electrochemical impedance spectroscopy (EIS) measurements showed a reduction in impedance from 30 Ωcm2 at 25 °C to 15 Ωcm2 at 65 °C, suggesting improved charge transfer characteristics and reduced internal resistance, which contribute to enhanced fuel cell performance. These findings not only demonstrate the efficiency and scalability of the DUHPFC stack for large-scale energy applications, but also address the need for more efficient and scalable fuel cell technologies by offering a viable solution to harness urea as a sustainable fuel source.

Suggested Citation

  • Meke, Ayse Sinem & Dincer, Ibrahim, 2025. "Experimental investigation and assessment of a new direct urea-hydrogen peroxide fuel cell stack," Energy, Elsevier, vol. 328(C).
    • Handle: RePEc:eee:energy:v:328:y:2025:i:c:s036054422502239x
    DOI: 10.1016/j.energy.2025.136597
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    References listed on IDEAS

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    1. Siddiqui, O. & Dincer, I., 2019. "Experimental investigation and assessment of direct ammonia fuel cells utilizing alkaline molten and solid electrolytes," Energy, Elsevier, vol. 169(C), pages 914-923.
    2. Lee, Jiseung & Salihi, Hassan & Lee, Jaeseung & Ju, Hyunchul, 2022. "Impedance modeling for polymer electrolyte membrane fuel cells by combining the transient two-phase fuel cell and equivalent electric circuit models," Energy, Elsevier, vol. 239(PC).
    3. Eisa, Tasnim & Park, Sung-Gwan & Mohamed, Hend Omar & Abdelkareem, Mohammad Ali & Lee, Jieun & Yang, Euntae & Castaño, Pedro & Chae, Kyu-Jung, 2021. "Outstanding performance of direct urea/hydrogen peroxide fuel cell based on precious metal-free catalyst electrodes," Energy, Elsevier, vol. 228(C).
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