Decoupled oxidation process enabled by atomically dispersed copper electrodes for in-situ chemical water treatment

Ziwei Yu, Xuming Jin, Yang Guo, Qian Liu, Wenyu Xiang, Shuai Zhou, Jiaying Wang, Dailin Yang, Hao Bin Wu () and Juan Wang ()
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Ziwei Yu: Zhejiang University
Xuming Jin: Zhejiang University
Yang Guo: Zhejiang University
Qian Liu: Zhejiang University
Wenyu Xiang: Zhejiang University
Shuai Zhou: Zhejiang University
Jiaying Wang: Zhejiang University
Dailin Yang: Zhejiang University
Hao Bin Wu: Zhejiang University
Juan Wang: Zhejiang University

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract In-situ wastewater treatment has gained popularity due to cost and energy savings tailored to water sources and user needs. However, this treatment, particularly through advanced oxidation processes (AOPs), poses ecological risks due to the need for strong oxidizing agents. Here, we present a decoupled oxidation process (DOP) using single-atom copper-modified graphite felt electrodes. This process creates a positive potential difference (ΔE ~ 0.5 V) between spatially isolated oxidants and organics and drives electron transfer-based redox reactions. The approach avoids the drawbacks of conventional AOPs, while being capable of treating various recalcitrant electron-rich organics. A floating water treatment device designed based on the DOP approach can degrade organic molecules in large bodies of water with oxidants stored separately in the device. We demonstrate that over 200 L of contaminated water can be treated with a floating device containing only 40 mL of oxidant (10 mM peroxysulphate). The modular device can be used in tandem structures on demand, maximizing water remediation per unit area. Our result provides a promising, eco-friendly method for in-situ water treatment that is unattainable with existing techniques.

Date: 2024
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DOI: 10.1038/s41467-024-45481-y

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