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在低度酸盐中通过质子转移调整促进电化学脱和资源回收

Chongchong Liu¹, Peifang Wang¹, Bin Hu¹

¹Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China.

Environmental science & technology

|October 6, 2025

概括

本研究介绍了一种疏水电极接口,用于高效地将酸盐降解为氨,这对于废水净化和回收至关重要. 新型TCTI电极最大限度地减少了的演变,增强了氨的选择性,并在低酸盐条件下减少了能源使用.

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
环境工程环境工程

背景情况:

酸盐的电还原 (eNO3RR) 对于废水处理和回收至关重要.
低酸盐度存在挑战,原因是竞争的进化反应 (HER).
有效地将酸盐转化为氨 (NH3) 需要尽量减少HER和能源消耗.

研究的目的:

开发一种用于选择性酸盐电还原为氨的新型电极接口.
为了抑制的演化,并提高低酸盐废水中的直接质子转移.
提高氨的选择性,减少电化学脱过程中的能源消耗.

主要方法:

用修改的Mxene (TCTI) 电极与疏水界面的制造.
电化学表征和现场分析以研究反应机制.
理论计算以验证拟议的质子合电子转移 (PCET) 途径.
交叉流电过系统 (CFE) 的设计和测试.

主要成果:

在低度酸盐环境 (10-80毫克L-1) 中,TCTI电极实现了高NH3选择性 (∼90%).
疏水界面有效地抑制了HER,促进了通过水介导的质子转移到酸盐.
CFE系统证明了同步的酸盐去除和氨回收,产生高纯度的NH4Cl.
对CFE系统实现了经济可行的运营成本.

结论:

疏水型TCTI电极为电化学脱和从低酸盐废水中回收提供了有效的解决方案.
水介导的PCET是增强NH3生产选择性的关键机制.
集成的CFE系统提供了一种切实可行的方法,可以同时去除污染物和回收资源.

关键词:

氨的回收使用方法电化学酸盐还原方法电化学酸盐还原方法低度的酸盐是一种低度的酸盐.质子转移是对质子的转移.

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