基于ClO-—HO2-平衡机制的氯介导电催生1O2机理探究

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Abstract Because of singlet oxygen (¹O₂)’s strong oxidation capability and environmental friendliness, understanding the mechanism of chlorine-mediated ¹O₂ generation in electrochemical processes can enhance wastewater treatment efficiency and minimize the side effects of active chlorine. Thus, electrochemical tests and treatment of Rhodamine B (RhB) simulated wastewater were used to assess the performance of Ir-Ta/Ti and Pt/Ti electrodes. The effects of different conditions (Cl^- concentration, chlorine evolution activity of electrodes, H₂O₂ addition, O₂ aeration) on electrochemical ¹O₂ generation were also explored. The results demonstrated that the ¹O₂-dominated electrochemical system can remove over 96% of RhB and shorten degradation pathways. Efficient ¹O₂ production depends on balancing hypochlorite (ClO^-) and hydroperoxyl (HO²_-) in the system, as an excess of either suppresses ¹O₂ generation. This study provides a theoretical framework for enhancing ¹O₂ generation under various conditions and the targeted preparation and modification of electrodes.

Key words： chlorine-mediated electrochemical formation of ¹O₂ RhB removal ClO^-—HO₂^- balance

Received: 03 June 2024

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X522

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	SUN Hao-rang
	YIN Ming-ming
	TANG Hai-liang
	WANG Li-zhang

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SUN Hao-rang,YIN Ming-ming,TANG Hai-liang等. Mechanism exploration for chlorine-mediated electrocatalytic generation of ¹O₂ based on the equilibrium between ClO^- and HO₂^-[J]. CHINA ENVIRONMENTAL SCIENCECE, 2025, 45(1): 167-174.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2025/V45/I1/167

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