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Hydrophobic POM Electrocatalyst Achieves Low Voltage “Charge” in Zn‐Air Battery Coupled with Bisphenol A Degradation by Xunkai Yin; Zichun Zhang; Kequan Yao; Xinxin Xu; Yun Wang is a Chemistry article available to read on EtoBox.

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## Abstract Zn‐air batteriesare a perspective power source for grid‐storage. But, after they are discharged at1.1 to 1.2 V, large overpotential is required for their charging (usually 2.5 V). This is due to a sluggish oxygen evolution reaction (OER). Incorporating organic pollutants into the cathode electrolyte is a feasible strategy for lowering the required charging potential. In the discharge process, the related oxygen reduction reaction, hydrophobic electrocatalysts are more popular than hydrophilic ones. Here, a hydrophobic bifunctional polyoxometalate electrocatalyst is synthesized by precise structural design. It shows excellent activities in both bisphenol A degradation and oxygen reduction reactions. In bisphenol A containing electrolyte, to achieve 100 mA ⋅ cm^−2^, its potential is only 1.32 V, which is 0.34 V lower than oxygen evolution reaction. In the oxygen reduction reaction, this electrocatalyst follows the four‐electron mechanism. In both bisphenol A degradation and oxygen reduction reactions, it shows excellent stability. With this electrocatalyst as cathode material and bisphenol A containing KOH as electrolyte, a Zn‐air battery was assembled. When “charged” at

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Author

Xunkai Yin; Zichun Zhang; Kequan Yao; Xinxin Xu; Yun Wang

Publisher

Wiley

Published

2021

Language

EN

Field

Chemistry (Physical Sciences)