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Photo-enhanced Zn-air batteries with simultaneously highly efficient in-situ H2O2 generation for wastewater treatment

Abstract

Energy crisis and environmental pollution represent a substantial impediment as of today. For the first time, we construct an electricity and H2O2 cogeneration-pollutant degradation integrated system based on a Zn-air battery with polyterthiophene (pTTh) as photo-enhanced electrocatalysts for high-efficient catalyzing 2e oxygen reduction reaction (ORR). This integrated system manifests lager peak power density of 195.0 mW/g at 150.0 mA/g, as well as high H2O2 production rate of 34.8 mg/L/h. Simultaneously, the superoxide (O2.) and hydroxyl radicals (.OH) resulting from the decomposition of the in-situ generated H2O2 can be used as oxidants to degrade the pollutant as demonstrated in succeeding sections as appropriate. The removal rate of RhB gets to almost 100% in the discharging process of this integrated system for 1 h. This work provides a proof-of-concept potential for applications in combing energy conversion with wastewater treatment technologies.

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Publication details

The article was received on 24 Apr 2019, accepted on 11 May 2019 and first published on 13 May 2019


Article type: Paper
DOI: 10.1039/C9TA04253A
J. Mater. Chem. A, 2019, Accepted Manuscript

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    Photo-enhanced Zn-air batteries with simultaneously highly efficient in-situ H2O2 generation for wastewater treatment

    K. Wang, Z. Mo, S. Tang, M. Li, H. Yang, B. Long, Y. Wang, S. Song and Y. Tong, J. Mater. Chem. A, 2019, Accepted Manuscript , DOI: 10.1039/C9TA04253A

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