在现场的电催化剂的演变,以在现实的条件下增强电化学酸盐的减少
Yingkai Chen1,2, Jiayu Luo2, Li Ling2
1School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
Environmental science and ecotechnology
|October 14, 2024
概括
电化学酸盐降解为氨 (ENRA) 在水处理方面表现有前景. 使用的Ni或Cu阴极可以提高ENRA的性能,但Ca2+和碳酸可以通过形成来抑制它,阻碍现实世界的应用.
科学领域:
- 电化学 电化学 电化学
- 环境科学 环境科学
- 催化剂是一种催化剂.
背景情况:
- 电化学酸盐降解为氨 (ENRA) 是Haber-Bosch生产氨和水处理的可持续替代方案.
- 对于ENRA在酸盐污染地下水等复杂溶液中的性能了解有限.
研究的目的:
- 使用商业阴极研究Ca2+和二碳酸盐对ENRA的影响.
- 在现实的水条件下评估ENRA的催化活性变化和稳定性.
主要方法:
- 为ENRA测试了商用Ni,Cu,Ti和Sn泡阴极.
- 分析了Ca2+和二碳酸盐对酸盐转化和氨选择性的影响.
- 使用实际地下水进行模拟的连续流动操作.
主要成果:
- 使用的Ni和Cu阴极与原始阴极相比,由于现场催化剂演化,显示出增强的ENRA活性.
- 非活性Ti和Sn阴极受到Ca2+和碳酸盐的影响较小.
- Ca2+和二碳酸盐通过在活性位点上形成CaCO3来抑制酸盐的转化.
- 在实际的地下水中,ENRA的性能迅速恶化,原因是硬度离子和有机物质阻断了活性部位.
结论:
- 在现场催化剂进化增强了Ni和Cu阴极上的ENRA.
- 碳酸和碳酸,以及硬度离子和有机物质,对ENRA在自然水中的稳定性构成重大挑战.
- 需要进一步的研究,以确保ENRA的长期稳定性,以处理酸盐污染的水体.
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