过氧化氢
电化学
氧化物
拉曼光谱
结构精修
催化作用
钙钛矿(结构)
陶瓷
电合成
无机化学
材料科学
化学工程
化学
晶体结构
电极
物理化学
有机化学
冶金
光学
物理
工程类
作者
Ziliang Chen,Jie Wu,Zhengran Chen,Hongyuan Yang,Kai Zou,Xiangyong Zhao,Ruihong Liang,Xianlin Dong,Prashanth W. Menezes,Zhenhui Kang
标识
DOI:10.1002/anie.202200086
摘要
The electrochemical oxygen reduction reaction (ORR) offers a most promising and efficient route to produce hydrogen peroxide (H2 O2 ), 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 H2 O2 . The optimized Pb(NiWMnNbZrTi)1/6 O3 ceramic is available on a kilogram-scale and displays commendable ORR activity in alkaline media with high selectivity over 91 % across the wide potential range for H2 O2 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.
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