Issue

Vol. 15 (2023)

Highly Selective Electrocatalytic CuEDTA Reduction by MoS2 Nanosheets for Efficient Pollutant Removal and Simultaneous Electric Power Output

https://doi.org/10.1007/s40820-023-01166-7
Hehe Qin
College of Environmental Science and Engineering, Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Road, Shanghai 200092, People’s Republic of China
Xinru Liu
College of Environmental Science and Engineering, Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Road, Shanghai 200092, People’s Republic of China
Xiangyun Liu
College of Environmental Science and Engineering, Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Road, Shanghai 200092, People’s Republic of China
Hongying Zhao
Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, People’s Republic of China
Shun Mao
College of Environmental Science and Engineering, Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, 1239 Siping Road, Shanghai 200092, People’s Republic of China

Corresponding Author: Shun Mao

shunmao@tongji.edu.cn

Nano-Micro Letters, Vol. 15 (2023), Article Number: 193

Abstract

Electrocatalytic reduction of ethylenediamine tetraacetic acid copper (CuEDTA), a typical refractory heavy metal complexation pollutant, is an environmental benign method that operates at mild condition. Unfortunately, the selective reduction of CuEDTA is still a big challenge in cathodic process. In this work, we report a MoS2 nanosheet/graphite felt (GF) cathode, which achieves an average Faraday efficiency of 29.6% and specific removal rate (SRR) of 0.042 mol/cm2/h for CuEDTA at − 0.65 V vs SCE (saturated calomel electrode), both of which are much higher than those of the commonly reported electrooxidation technology-based removal systems. Moreover, a proof-of-concept CuEDTA/Zn battery with Zn anode and MoS2/GF cathode is demonstrated, which has bifunctions of simultaneous CuEDTA removal and energy output. This is one of the pioneer studies on the electrocatalytic reduction of heavy metal complex and CuEDTA/Zn battery, which brings new insights in developing efficient electrocatalytic reduction system for pollution control and energy output.


Highlights:
1 Highly efficient CuEDTA removal by an electrolyzer with MoS2 nanosheet cathode.
2 Higher removal rate and Faraday efficiency compared with other widely reported electrocatalytic technologies.
3 CuEDTA/Zn primary battery is constructed for the first time to realize CuEDTA removal and synchronous power generation.

Keywords

Electrocatalytic reduction CuEDTA removal MoS2 nanosheet CuEDTA/Zn battery Faraday efficiency
Qin, Hehe, Xinru Liu, Xiangyun Liu, Hongying Zhao, and Shun Mao. 2023. “Highly Selective Electrocatalytic CuEDTA Reduction by MoS2 Nanosheets for Efficient Pollutant Removal and Simultaneous Electric Power Output”. Nano-Micro Letters 15 (August):193. https://doi.org/10.1007/s40820-023-01166-7.
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