Porous and B-site Substituted Y2[Mn0.2Ru0.8]2O7 Pyrochlore for Boosting Acidic Water Oxidation Activity and Stability

IF 3.8 3区化学 Q2 CHEMISTRY, PHYSICAL ChemCatChem Pub Date : 2024-10-06 DOI:10.1002/cctc.202401419

Zhan Tian, Dr. Xin Yang, Hongrui Jia, Dr. Huan Liu, Dr. Guoqiang Li

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Abstract

Boosting the reaction stability without sacrificing the activity and cost is extremely important but full of challenges for the RuO₂-based oxygen evolution catalysts. Herein, porous and B-site substituted Y₂[Mn_0.2Ru_0.8]₂O₇ (p-Y₂[Mn_0.2Ru_0.8]₂O₇) pyrochlore toward oxygen evolution reaction is innovatively synthesized. The formed meso-/macroporous structure can increase the specific surface area and corresponding active sites, meanwhile, Mn-substitution can modulate the electronic structure, stabilize the morphology, and reduce the dosage of Ru species. Interestingly, the p-Y₂[Mn_0.2Ru_0.8]₂O₇ performs 50 h stable operation, significantly outperforming the commercial RuO₂(CM) counterpart with less than 2 h life. Furthermore, the required overpotential to achieve 10 mA cm⁻² is only 266 mV, accompanied with favorable reaction kinetics and catalyst utilization.

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来源期刊

ChemCatChem 化学-物理化学

CiteScore

8.10

自引率

4.40%

发文量

511

审稿时长

1.3 months

期刊介绍： With an impact factor of 4.495 (2018), ChemCatChem is one of the premier journals in the field of catalysis. The journal provides primary research papers and critical secondary information on heterogeneous, homogeneous and bio- and nanocatalysis. The journal is well placed to strengthen cross-communication within between these communities. Its authors and readers come from academia, the chemical industry, and government laboratories across the world. It is published on behalf of Chemistry Europe, an association of 16 European chemical societies, and is supported by the German Catalysis Society.