Ag纳米粒子诱导的表面化物固定化策略使海水电解稳定
Wenwen Xu1, Zhongfeng Wang1,2, Pingying Liu3
1Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Qianwan Institute of CNITECH, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, China.
Advanced materials (Deerfield Beach, Fla.)
|October 31, 2023
概括
将银纳米粒子加载到阳极上显著提高了海水电解的生产. 这一突破打击了化物腐蚀,通过气发电实现了稳定,大规模的可再生能源储存.
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
- 可再生能源是可再生能源的来源.
背景情况:
- 大规模的海上可再生能源储存依赖于气 (H) 生产.
- 海水电解用于H2生成面临由于化物 (Cl-) 离子而导致阳极腐蚀的挑战.
- 开发耐腐蚀阳极对于将这种技术商业化至关重要.
研究的目的:
- 研究在海水电解过程中增强阳极稳定性的方法.
- 开发一种策略,以减轻由化物离子引起的阳极腐蚀.
- 从海水中实现可扩展的气生产,用于储存可再生能源.
主要方法:
- 将银 (Ag) 纳米粒子加载到一个铁层双氧化物 (NiFe-LDH) 催化剂上.
- 在盐电解质和海水中测试修改后的NiFe-LDH@Ag电极的性能和耐用性.
- 使用表征和模拟技术来了解腐蚀减缓机制.
主要成果:
- 与未经修改的阳极相比,NiFe-LDH@Ag电极在稳定性上表现出一个数量级的增加.
- 在400 mA cm-2下稳定运行超过5000小时在盐液电解质中和2500小时在海水中.
- 鉴定结果显示,Ag纳米颗粒与离子反应,在阳极表面形成保护性,无离子的保护层.
结论:
- 将银纳米粒子加载到阳极上是一种非常有效的策略,可以防止化物诱导的腐蚀.
- 开发的NiFe-LDH@Ag电极为海水电解提供了特殊的长期耐用性.
- 这种固定化策略具有巨大的潜力,可以从海水中大规模,经济高效地生产气.
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