| 硫化铋对铁电极电化学性能的影响 |
| Influence of bismuth trisulfide on the electrochemical performance of iron electrode |
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| 摘要: 将铁(Fe)纳米颗粒、石墨(Gr)和不同质量硫化铋(Bi2S3)混合并进行高能球磨处理，得到 Bi2S3@Fe-Gr复合材料并制备相应的铁电极。利用循环伏安法研究了Bi2S3@Fe-Gr铁电极在碱性和中性溶液中的氧化还原过程。析氢反应极化曲线表明，在碱性和中性溶液中Bi2S3-3@Fe-Gr铁电极(Bi2S3的添加量为3 mg)均具有优异的抑制氢析出性能，其主要原因是在铁电极中加入适量的 Bi2S3增加了析氢反应的过电位；而当 Bi2S3的含量增加到 6 mg时，所得 Bi2S3-6@Fe-Gr铁电极具有较好的抑制铁电极钝化的能力，这是因为高能球磨过程使Bi2S3充分分散，并且改变了铁颗粒的表面状态，从而减缓铁电极表面的钝化。 |
| 关键词: 铁-空气电池|硫化铋|石墨|钝化|析氢反应 |
| 基金项目: 国家自然科学基金(No.22379042)资助。 |
| Abstract: Iron (Fe) nanoparticles and graphite (Gr) with different masses of bismuth trisulfide (Bi2S3) were mixed by high-energy ball milling treatment to fabricate the corresponding composite iron anodes Bi2S3@Fe-Gr. The hydrogen evolution reaction and iron passivation process on these iron electrodes were investigated in alkaline and neutral solutions. The iron electrode Bi2S3-3@Fe-Gr (The additional amount of Bi2S3 was 3 mg) revealed the strongest ability to inhibit hydrogen evolution among the iron electrodes of the present investigation, while the Bi2S3-6@Fe-Gr electrode (The additional amount of Bi2S3 was 6 mg) delivered significant performance in inhibiting anodic passivation. This is because the high-energy ball milling process leads to the well-dispersion of Bi2S3 and the changes in the surface of Fe nanoparticles, thereby slowing down the passivation of the iron electrode surface. |
| Keywords: iron-air battery|bismuth trisulfide|graphite|passivation|hydrogen evolution reaction |
| 投稿时间：2024-12-17 修订日期：2025-04-18 |
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