通过Pd/In修改的泡电极在水溶液中将酸盐电催化降解为氨
Zhanhui Shen1, Li Tang2, Jialu Shi1
1Henan Key Laboratory for Synergistic Prevention of Water and Soil Environmental Pollution, School of Geographic Sciences, Xinyang Normal University, Xinyang, 464000, China.
Journal of environmental management
|March 23, 2024
概括
这项研究开发了一种新的双金属电极 (NF-Pd/In),用于高效地将酸盐电还原为氨. 电极表现出高的去除率和选择性,为废水处理提供了可持续的解决方案.
科学领域:
- 环境化学环境化学
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
背景情况:
- 水中的酸盐污染对环境和健康构成重大风险.
- 将酸盐电还原为氨,为废水整治和资源回收提供了一个有前途的方法.
- 开发高效和选择性的电催化剂对于这一过程至关重要.
研究的目的:
- 在泡 (NF-Pd/In) 上支持的新型- (Pd/In) 双金属电极的合成和特征.
- 为了评估NF-Pd/In电极对酸盐电还原到氨的电催化性能.
- 为了研究电解质组成和电极稳定性对工艺的影响.
主要方法:
- 两个阶段的电位置,以准备NF-Pd/In电极.
- 用于材料表征的FESEM-EDS,XRD和XPS.
- 电化学测试,包括时空测量和电化学阻抗光谱 (EIS).
- 密度函数理论 (DFT) 计算以了解反应机制.
主要成果:
- NF-Pd/In电极表现出一个高表面积,均分布的Pd和In纳米粒子.
- 在Na2SO4电解质中,在-1.6V时达到超过96%的酸盐去除和95%的氨选择性,而不是Ag/AgCl.
- 与赤裸的泡相比,表现出明显较低的电极电阻.
- 鉴定出高NaCl度降低了由于副作用反应导致的氨选择性.
- 据DFT的计算表明,印促进了酸盐降解中间体.
结论:
- 开发的NF-Pd/In电极对于选择性电还原酸盐到氨非常有效.
- 电极显示出良好的稳定性和实际废水处理应用的潜力.
- 了解电解质成分的作用是优化氨的选择性的关键.
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