比较基于Ni和Pt的性离子交换膜水电解电极的内在催化活性和实际性能
Advay Shirwalkar1, Manjodh Kaur1, Sichen Zhong2
1Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States.
概括
非贵金属- (Ni-Mo) 催化剂显示出可再生生产的前景. 当中毒效应被减轻时,Ni-Mo阴极的性能与水电解剂中的宝贵- (Pt-Ru) 催化剂相当.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 可再生能源可再生能源是可再生能源.
背景情况:
- 可再生的生产依赖于高效的电解剂.
- 具有成本效益的电解剂需要具有高活性和耐久性的非贵金属催化剂.
- 类金属 (PGM) 目前占主导地位,但价格昂贵.
研究的目的:
- 研究性水电解剂中非贵金属- (Ni-Mo) 催化剂的性能.
- 了解内在催化剂活性与电解剂性能之间的关系.
- 评估用Ni-Mo替代品取代贵金属催化剂的潜力.
主要方法:
- 使用Ni-Mo和- (Pt-Ru) 阴极催化剂的电解器组件的制造和测试.
- 使用转换频率 (TOF) 测量对演化反应 (HER) 活动的评估.
- 通过离子交换离子体对催化剂中毒效应的研究.
主要成果:
- 在低极化 (<100 mV) 条件下,纳米颗粒Ni-Mo在循环频率基础上表现出大约比Pt-Ru低10倍的HER活性.
- 阿里尔皮皮里迪尼离子交换离子体与二碳酸盐反离子抑制了Ni-Mo/C阴极的HER活性.
- 在解决了中毒效应后,基于Ni-Mo/C阴极的电解器表现出与基于Pt-Ru阴极的组件无法区分的性能.
结论:
- 阴极对整体细胞两极分化的贡献是最小的,即使使用不那么活跃的Ni-Mo催化剂.
- 非珍贵的Ni-Mo催化剂可以在不影响性能的情况下取代性水电解剂中的珍贵的Pt基阴极.
- 这项研究为更具成本效益的可再生气生产铺平了道路.
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