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<p>This study investigates the role of iron in enhancing hydrogen storage and antioxidant properties of TiCo<sub>1-x</sub>Fe<sub>x</sub> (x = 0, 0.1, 0.2, 0.3) alloys. All alloys consist of TiCo, Ti<sub>2</sub>Co and Ti phases. After activation, they exhibit similar maximum hydrogen storage capacity of around 1.3&#xa0;wt.%. Reversible hydrogen storage capacity strongly depends on vacuum condition. The retention rate of hydrogen storage capacity exceeds 99% at 350&#xa0;°C. At room temperature (30&#xa0;℃), the retention rate of hydrogen storage capacity rises from 53.9 to 66.4% as Fe content increases from x = 0 to 0.3. Hydride decomposition temperatures decrease with Fe content, dropping from ~ 150&#xa0;°C (x = 0) to ~ 100&#xa0;°C (x = 0.3). Additionally, Fe preferentially oxidizes to form Fe oxides, shielding TiCo phase from oxidation and improving antioxidant properties. Finally, Fe also reduces the hydride stability and lowers the decomposition temperature.</p>

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Hydrogen Storage Properties and Antioxidant Properties of TiCo Alloy Through Introduction of Iron

  • 期刊论文

  • 发表日期：

    2026年1月25日

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  • Quanyu Liu,
  • Cheng Peng,
  • Peng Lv,
  • Dongfang Huang,
  • Zhichen Liu,
  • Quanbao Zhou,
  • Xuegang Wang

摘要

This study investigates the role of iron in enhancing hydrogen storage and antioxidant properties of TiCo1-xFex (x = 0, 0.1, 0.2, 0.3) alloys. All alloys consist of TiCo, Ti2Co and Ti phases. After activation, they exhibit similar maximum hydrogen storage capacity of around 1.3 wt.%. Reversible hydrogen storage capacity strongly depends on vacuum condition. The retention rate of hydrogen storage capacity exceeds 99% at 350 °C. At room temperature (30 ℃), the retention rate of hydrogen storage capacity rises from 53.9 to 66.4% as Fe content increases from x = 0 to 0.3. Hydride decomposition temperatures decrease with Fe content, dropping from ~ 150 °C (x = 0) to ~ 100 °C (x = 0.3). Additionally, Fe preferentially oxidizes to form Fe oxides, shielding TiCo phase from oxidation and improving antioxidant properties. Finally, Fe also reduces the hydride stability and lowers the decomposition temperature.