用毛细管效应启用水电解,通过使用散装有孔的电极增强电化学臭氧生产
Chen Zhang1,2, Yingfeng Xu1,2, Ping Lu1
1State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences , Shanghai 200050, PR China.
Journal of the American Chemical Society
|November 4, 2017
概括
这项研究引入了一种用于增强气态臭氧产生的新型毛细管效应电解策略. 这种方法利用独特的阳极设计来抑制氧气演变并提高臭氧产量,为冠状放电提供了替代方案.
科学领域:
- 电化学
- 材料科学
背景情况:
- 电化学氧化演变反应 (OER) 需要显著的超电位,阻碍水电解效率.
- 电化学臭氧生产 (EOP) 提供了冠状排放的替代方案,但面临着OER竞争和臭氧逃逸的挑战.
研究的目的:
- 开发一种以毛细管效应为基础的电解策略,以提高气态臭氧的产生.
- 抑制相应的氧气演化反应 (OER) 并提高臭氧产量.
主要方法:
- 使用带有β-PbO2立方体的大量多孔制成的部分浸泡阳极.
- 研究毛细管压力和阳极结构对臭氧产生的影响.
主要成果:
- 与固体阳极或通常的浸泡相比,电催化气体臭氧的产生显著增加.
- 鉴定了一个"分子氧气锁定效应"由于毛细血管压力在多孔阳极.
- 观察到一种不寻常的O3中间体的产生,有利于EOP.
结论:
- 使用多孔阳极的毛细体效应电解策略有效地增强了气态臭氧的产生.
- "分子氧气锁定效应"和O3中间体的形成是改进EOP机制的关键.
- 这种方法为通过水电解产生臭氧提供了有希望的替代方案.
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