High-Entropy Perovskite Fluorides: A New Platform for Oxygen Evolution Catalysis,Journal of the American Chemical Society

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High-Entropy Perovskite Fluorides: A New Platform for Oxygen Evolution Catalysis
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2020-02-27 , DOI: 10.1021/jacs.9b12377
Tao Wang ₁ , Hao Chen ₁ , Zhenzhen Yang ₁ , Jiyuan Liang ₁ , Sheng Dai _{1,

2}

Affiliation

High-entropy perovskite fluorides (HEPFs) have great poten-tial in electrocatalysis that has not been realized because of the limitation of a high-temperature synthetic route and the limited understanding of high-entropy materials. The use of HEPFs in effective oxygen evolution catalysis and a feasible synthesis route for HEPFs in a boiled solution by combining a hydrothermal method with mechanochemistry are first reported here. These HEPFs consisting of cost-effective ele-ments dramatically gave excellent catalytic activity for the oxygen evolution reaction (OER) in an alkaline media. Par-ticularly, K0.8Na0.2(MgMnFeCoNi)F3 exhibited excellent OER performance with a low overpotential of 314 mV at a current density of 10 mA/cm2, much lower than that of commercial IrO2.

中文翻译：

高熵钙钛矿氟化物：析氧催化的新平台

由于高温合成路线的限制和对高熵材料的了解有限，高熵钙钛矿氟化物（HEPFs）在电催化方面具有巨大的潜力尚未实现。本文首次报道了 HEPFs 在有效析氧催化中的应用，以及通过将水热法与机械化学相结合，在沸腾溶液中合成 HEPFs 的可行途径。这些由具有成本效益的元素组成的 HEPF 显着地为碱性介质中的析氧反应 (OER) 提供了出色的催化活性。特别是 K0.8Na0.2(MgMnFeCoNi)F3 表现出优异的 OER 性能，在 10 mA/cm2 的电流密度下具有 314 mV 的低过电位，远低于商业 IrO2 的过电位。

更新日期：2020-02-27

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