期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 61, 期 21, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202200086
关键词
Electrocatalysis; High Entropy; Hydrogen Peroxide; Oxygen Reduction Reaction; Perovskite Oxide Ceramic
资金
- National Key R&D Program of China [2020YFA0406104, 2018YFC0308603]
- National MCF Energy R&D Program of China [2018YFE0306105]
- Natural Science Foundation of Jiangsu Province [BK20210735]
- CIC
- 111 Project
- Alexander von Humboldt (AvH) Foundation
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy [EXC 2008/1-390540038-UniSysCat]
- China Scholarship Council (CSC)
- German Federal Ministry of Education and Research [03EW0015A/B]
- Projekt DEAL
This study employs an entropy-enhancement strategy to enable low-cost perovskite oxide to effectively catalyze the electrosynthesis of H2O2. The optimized Pb(NiWMnNbZrTi)(1/6)O-3 ceramic exhibits commendable ORR activity in alkaline media, displaying high selectivity for H2O2 and exceptional degradation property for organic dyes through the Fenton process.
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)(1/6)O-3 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 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.
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