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- Title
Highly Selective Electrocatalytic CuEDTA Reduction by MoS<sub>2</sub> Nanosheets for Efficient Pollutant Removal and Simultaneous Electric Power Output.
- Authors
Qin, Hehe; Liu, Xinru; Liu, Xiangyun; Zhao, Hongying; Mao, Shun
- Abstract
Highlights: Highly efficient CuEDTA removal by an electrolyzer with MoS2 nanosheet cathode. Higher removal rate and Faraday efficiency compared with other widely reported electrocatalytic technologies. CuEDTA/Zn primary battery is constructed for the first time to realize CuEDTA removal and synchronous power generation. 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.
- Subjects
ELECTRIC power; POLLUTANTS; NANOSTRUCTURED materials; HEAT resistant alloys; COPPER
- Publication
Nano-Micro Letters, 2023, Vol 15, Issue 1, p1
- ISSN
2311-6706
- Publication type
Article
- DOI
10.1007/s40820-023-01166-7