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<p>This study demonstrates an innovative approach for green and efficient hydrogen production from seawater, utilizing Cu–Fe/Al<sub>2</sub>O<sub>3</sub> catalysts coupled with a dielectric barrier discharge (DBD) system. The catalytic performance was systematically evaluated under varying voltages and Cu/Fe ratios in a DBD reactor to optimize hydrogen production efficiency. Subsequent investigations focused on humidity and gas flow rate effects using the optimal catalyst (Cu/Fe/Al<sub>2</sub>O<sub>3</sub> = 2:1:9). Multimodal characterization (XRD, XPS, FTIR, OES) combined with DFT calculations revealed the mechanistic role of Cu–Fe/Al<sub>2</sub>O<sub>3</sub> in plasma-driven hydrogen generation. The synergistic interaction between Fe and Cu enhanced hydroxyl/hydrogen radical generation through improved adsorption, thereby boosting hydrogen evolution efficiency and yield. The optimized system achieved a maximum hydrogen yield of 7.4&#xa0;g/kWh at 3&#xa0;kV operating voltage, 3 L/min argon flow, and 100% relative humidity, establishing an energy-efficient pathway for sustainable hydrogen production from seawater.</p> Graphical Abstract <p></p>

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Efficient Conversion of Seawater Vapor to Hydrogen Using Cu–Fe/Al2O3 Catalysts Assisted by Non-thermal Plasma

  • 期刊论文

  • 发表日期：

    2025年8月28日

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  • Yuhang Zhong,
  • Hui Xu,
  • Zhiguo Li,
  • Yuqi Zhang,
  • Jianyuan Hou,
  • Yuan Yuan,
  • Xingang Liu,
  • Renxi Zhang

摘要

This study demonstrates an innovative approach for green and efficient hydrogen production from seawater, utilizing Cu–Fe/Al2O3 catalysts coupled with a dielectric barrier discharge (DBD) system. The catalytic performance was systematically evaluated under varying voltages and Cu/Fe ratios in a DBD reactor to optimize hydrogen production efficiency. Subsequent investigations focused on humidity and gas flow rate effects using the optimal catalyst (Cu/Fe/Al2O3 = 2:1:9). Multimodal characterization (XRD, XPS, FTIR, OES) combined with DFT calculations revealed the mechanistic role of Cu–Fe/Al2O3 in plasma-driven hydrogen generation. The synergistic interaction between Fe and Cu enhanced hydroxyl/hydrogen radical generation through improved adsorption, thereby boosting hydrogen evolution efficiency and yield. The optimized system achieved a maximum hydrogen yield of 7.4 g/kWh at 3 kV operating voltage, 3 L/min argon flow, and 100% relative humidity, establishing an energy-efficient pathway for sustainable hydrogen production from seawater.

Graphical Abstract