Citation: Yican Zhang, Jiangli Sun, Shasha Li, Xueying Ren, Jiana Jing, Jiatong Zhang, Yujie Chen, Minghua Zhou. Interlaced nanosheet-structured Co₃O₄/Ti anode for efficient chlorine evolution for in-situ environmental remediation[J]. Chinese Chemical Letters, ;2026, 37(5): 111857. doi: 10.1016/j.cclet.2025.111857 shu

Interlaced nanosheet-structured Co₃O₄/Ti anode for efficient chlorine evolution for in-situ environmental remediation

Yican Zhang ^{a, b, c} ,
Jiangli Sun ^{a, b, c} ,
Shasha Li ^{a, b, c} ,
Xueying Ren ^{a, b, c} ,
Jiana Jing ^{a, b, c} ,
Jiatong Zhang ^{a, b, c} ,
Yujie Chen ^{a, b, c} ,
Minghua Zhou ^{a, b, c, *,}

a.
Key Laboratory of Pollution Process and Environmental Criteria, Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
b.
Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
c.
Tianjin Advanced Water Treatment Technology International Joint Research Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China

zhoumh@nankai.edu.cn

Received Date: 10 July 2025
Revised Date: 11 September 2025
Accepted Date: 17 September 2025
Available Online: 17 September 2025

Figures(7)

Chlorine is not only widely used as an important basic chemical, but also shows promising in-situ electrochemical remediation. Unfortunately, its electrochemical production usually relies on expensive noble-metal dimensionally stable anode (DSA). Herein, a high-performance non-noble metal Co₃O₄/Ti anode was developed by a simple electrodeposition-calcination method, demonstrating a high efficiency in producing active chlorine in a wide pH range (3–11) and at relatively low Cl^- concentration close to different real environmental requirements due to its abundant surface area and active sites provided by the interlaced nanosheet structure anode. Compared with commercial DSA, the Co₃O₄/Ti anode offered significant advantages in terms of Faraday efficiency, electric energy consumption and economic cost, achieving the rate of active chlorine production of 14.97 mg L^-1 min^-1 in 0.5 mol/L NaCl electrolyte solution (pH 6) with a Faraday efficiency of 96.8% and low energy consumption of 2.49 kWh/kg. Moreover, the robust backbone structure of the anode enabled the Faraday efficiency to be maintained at about 92.2% without deactivation after ten cycles of reaction. In addition, this Co₃O₄/Ti electrode demonstrated effectiveness in treating organic pollutants and mariculture wastewater and seawater rapid sterilization. This study provides new inspirations for the construction of highly efficient, low-cost, and low energy consumption non-noble metal cobalt-based anode for the in-situ environmental remediation application.
- Chlorine evolution reaction,
- Co₃O₄ nanosheets,
- Dimensionally stable anode,
- Active chlorine,
- Wastewater treatment
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通讯作者: 陈斌, bchen63@163.com

Interlaced nanosheet-structured Co₃O₄/Ti anode for efficient chlorine evolution for in-situ environmental remediation