Zhan Tian, Dr. Xin Yang, Hongrui Jia, Dr. Huan Liu, Dr. Guoqiang Li
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引用次数: 0
摘要
在不牺牲活性和成本的情况下提高反应稳定性是非常重要的，但对基于ruo2的析氧催化剂来说充满了挑战。本文创新性地合成了多孔b位取代的Y2[Mn0.2Ru0.8]2O7 （p-Y2[Mn0.2Ru0.8]2O7）焦氯酸盐析氧反应。形成的介孔/大孔结构可以增加比表面积和相应的活性位点，同时mn取代可以调节电子结构，稳定形貌，减少Ru的用量。有趣的是，p-Y2[Mn0.2Ru0.8]2O7可以稳定运行50小时，显著优于商用RuO2(CM)，其寿命不到2小时。此外，达到10 mA cm−2所需的过电位仅为266 mV，并伴有良好的反应动力学和催化剂利用率。
Porous and B-site Substituted Y2[Mn0.2Ru0.8]2O7 Pyrochlore for Boosting Acidic Water Oxidation Activity and Stability
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[Mn0.2Ru0.8]2O7 (p-Y2[Mn0.2Ru0.8]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[Mn0.2Ru0.8]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.
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.
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