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Entropy Enhanced Perovskite Oxide Ceramic for Efficient Electrochemical Reduction of Oxygen to Hydrogen Peroxide

Authors :
Ziliang Chen
Jie Wu
Zhengran Chen
Hongyuan Yang
Kai Zou
Xiangyong Zhao
Ruihong Liang
Xianlin Dong
Prashanth W. Menezes
Zhenhui Kang
Source :
Angewandte Chemie International Edition. 61
Publication Year :
2022
Publisher :
Wiley, 2022.

Abstract

The electrochemical oxygen reduction reaction ORR offers a most promising and efficient route to produce hydrogen peroxide H2O2 , yet the lack of cost effective and high performance electrocatalysts have restricted its practical application. Herein, an entropy enhancement strategy has been employed to enable the low cost perovskite oxide to effectively catalyze the electrosynthesis of H2O2. The optimized Pb NiWMnNbZrTi 1 6O3 ceramic is available on a kilogram scale and displays commendable ORR activity in alkaline media with high selectivity over 91 amp; 8201; across the wide potential range for H2O2 including an outstanding degradation property for organic dyes through the Fenton process. The exceptional performance of this perovskite oxide is attributed to the entropy stabilization induced polymorphic transformation assuring the robust structural stability, decreased charge mobility as well as synergistic catalytic effects which we confirm using advanced in situ Raman, transient photovoltage, Rietveld refinement as well as finite elemental analysis

Details

ISSN :
15213773 and 14337851
Volume :
61
Database :
OpenAIRE
Journal :
Angewandte Chemie International Edition
Accession number :
edsair.doi.dedup.....86adf17482419a4272e9da63515ff358