基于FeCoNi的合金涂层作为性水电解的低超电位电催化剂
Jinyuan Zhong1, Yuanwu Zhang1, Xiaoran Huo1
1School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, P. R. China.
Chemistry, an Asian journal
|November 9, 2024
概括
这项研究开发了一种新的FeCoNi-Ni3C合金涂层,使用大气等离子体喷雾来实现高效的电催化. 优化的50%Ni3C涂层显著降低了和氧演变反应的过度潜力,为水分裂变证明了出色的稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 能源转换 能源转换
背景情况:
- 开发高效,稳定和低成本的电催化剂对于解决能源危机至关重要.
- 增加电极表面积可以提高电催化效率.
- 碳化 (Ni3C) 兴奋剂被探索为提高电催化剂性能的一种策略.
研究的目的:
- 使用大气等离子喷雾 (APS) 制备FeCoNi-Ni3C合金涂层.
- 研究Ni3C含量对FeCoNi涂层微观结构和电催化活性的影响.
- 评估开发的涂料在水分裂过程中的演化反应 (HER) 和氧演化反应 (OER) 的性能.
主要方法:
- 使用大气等离子喷涂 (APS) 技术制造FeCoNi-Ni3C合金涂层.
- 不同的Ni3C原子比率 (25%,50%,75%) 被纳入FeCoNi粉末混合物中.
- 电催化性能通过测量HER和OER在1.0MKOH电解质中的超潜力,以10mAcm-2.2的电流密度来评估.
- 通过延长运行来评估电化学稳定性.
主要成果:
- 3C兴奋剂增加了表面多孔性,为电催化提供了更多活跃的区域.
- 费科尼涂层表现出 191 mV (HER) 和 277 mV (OER) 的超电位.
- 50%的Ni3C FeCoNi-Ni3C涂层显示了显著减少的105mV (HER) 和212mV (OER) 的超电位.
- 这种优化的涂层实现了较低的Tafel斜率 (45.78 mV dec-1用于HER,44 mV dec-1用于OER),并在稳定性测试后显示了可以忽略不计的超电位衰减.
- 50%的Ni3C FeCoNi-Ni3C涂层在1.664V的低电位下运行,以10mA cm-2.2的水分离.
结论:
- 控制Ni3C比例有效调节涂层孔隙性,并增强电催化活性.
- 50% Ni3C FeCoNi-Ni3C 涂层表现出优越的 HER 和 OER 性能和出色的稳定性.
- 这项研究为设计用于能源应用的廉价和高性能电催化剂提供了有前途的方法.
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