溶解物环境和基于Pb的阳极的相控的协同战略,以解决活动稳定性权衡问题
Siwei Zhuang1, Ning Duan1, Fuyuan Xu1
1State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
Journal of hazardous materials
|April 5, 2024
概括
使用离子和控制的二氧化相的新策略改善了酸电解中的阳极性能. 这种方法平衡了活动和稳定性,减少了工业应用的有害副产品.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 在酸电氧化中,金属阳极面临着活性和稳定性之间的权衡,特别是在工业电流密度下.
- 阳极粘液积累限制了修改后的阳极的长期性能,尽管初始活动增强.
- 开发稳定和活跃的阳极对于高效的工业电氧化工艺至关重要.
研究的目的:
- 提出一种协同策略,以实现基阳极的活性和稳定性之间的平衡,用于缩硫酸电解.
- 研究离子 (Mn2+) 和控制的二氧化 (MnO2) 水晶相在提高阳极性能方面的作用.
- 为了证明这种策略在运行水电金条件下的有效性.
主要方法:
- 开发了一种协同策略,将溶液环境控制与阳极相位控制相结合.
- 研究了非外源Mn2+对阳极重建,反应性氧物种捕获和腐蚀依赖活性的影响.
- 在Mn2+/α-MnO2和Mn2+/γ-MnO2系统之间进行了性能比较,重点是氧演变反应 (OER) 和污染物减少.
主要成果:
- Mn2+促进了阳极重建和活动减轻,其效果取决于MnO2晶相.
- 与Mn2+/α-MnO2.2相比,Mn2+/γ-MnO2系统在氧化演化反应 (OER) 中表现出优越的活性和稳定性.
- 在阳极上预涂的γ-MnO2确保了相位稳定性和高性能,具有超低的危险粘液产生.
结论:
- 溶液环境和相位控制的协同策略,特别是Mn2+/γ-MnO2,有效地解决了阳极中的活动稳定性权衡问题.
- 由Mn2+促进的γ-MnO2的自我修复能力是持续高性能和减少粘液形成的关键.
- 这种方法为水电金和相关领域的电氧化过程中常见的问题提供了有希望的解决方案.
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