From a Molecular 2Fe-2Se Precursor to a Highly Efficient Iron Diselenide Electrocatalyst for Overall Water Splitting,Angewandte Chemie International Edition

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From a Molecular 2Fe-2Se Precursor to a Highly Efficient Iron Diselenide Electrocatalyst for Overall Water Splitting
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2017-07-19 06:21:25 , DOI: 10.1002/anie.201706196
Chakadola Panda ₁ , Prashanth W. Menezes ₁ , Carsten Walter ₁ , Shenglai Yao ₁ , Matthias E. Miehlich ₂ , Vitaly Gutkin ₃ , Karsten Meyer ₂ , Matthias Driess ₁

Affiliation

A highly active FeSe₂ electrocatalyst for durable overall water splitting was prepared from a molecular 2Fe-2Se precursor. The as-synthesized FeSe₂ was electrophoretically deposited on nickel foam and applied to the oxygen and hydrogen evolution reactions (OER and HER, respectively) in alkaline media. When used as an oxygen-evolution electrode, a low 245 mV overpotential was achieved at a current density of 10 mA cm⁻², representing outstanding catalytic activity and stability because of Fe(OH)₂/FeOOH active sites formed at the surface of FeSe₂. Remarkably, the system is also favorable for the HER. Moreover, an overall water-splitting setup was fabricated using a two-electrode cell, which displayed a low cell voltage and high stability. In summary, the first iron selenide material is reported that can be used as a bifunctional electrocatalyst for the OER and HER, as well as overall water splitting.

中文翻译：

从分子2Fe-2Se前驱体到高效的二硒化铁电催化剂，用于总水分解

由分子2Fe-2Se前驱体制备了用于持久性总水分解的高活性FeSe ₂电催化剂。合成后的FeSe ₂电泳沉积在泡沫镍上，并在碱性介质中应用于氧和氢的放出反应（分别为OER和HER）。当用作放氧电极时，在10 mA cm ^-2的电流密度下可实现低245 mV的过电势，由于在FeSe表面形成了Fe（OH）₂ / FeOOH活性位，因此具有出色的催化活性和稳定性。_2个。值得注意的是，该系统对HER也很有利。而且，使用两电极电池制造了整体的水分解装置，其显示出低电池电压和高稳定性。总之，据报道，第一种硒化铁材料可用作OER和HER的双功能电催化剂，以及总的水分解剂。

更新日期：2017-07-20

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