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

Ayse Sinem Meke and Ibrahim Dincer

Energy, 2025, vol. 328, issue C

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.

Keywords: Fuel cell; Fuel; Hydrogen; Hydrogen peroxide; Energy; Exergy; Efficiency; Urea (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:328:y:2025:i:c:s036054422502239x

DOI: 10.1016/j.energy.2025.136597

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