MOF 衍生多孔 Fe3O4/RuO2-C 复合材料用于高效碱性整体水分解,ACS Applied Energy Materials

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MOF 衍生多孔 Fe3O4/RuO2-C 复合材料用于高效碱性整体水分解
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2022-05-03 , DOI: 10.1021/acsaem.2c00471
Anirudha Shekhawat _{1,

2} , Rajib Samanta _{1,

2} , Sudip Barman _{1,

2}

Affiliation

开发用于整体水分解的高活性、耐用、双功能电催化剂对于提高氢能的使用非常重要。在此，我们从金属有机框架 (MOF) 材料合成了多孔且富界面的 Fe ₃ O ₄ /RuO ₂ -C 复合材料，用于在碱性介质中进行整体水分解。Fe ₃ O ₄ /RuO ₂ -C 催化剂表现出优异的析氧反应（OER）和高法拉第效率。它需要 268 mV 的过电位才能达到 20 mA/cm ²的电流密度。该催化剂还表现出良好的析氢反应 (HER)，电流密度为 10 mA/cm ²在 94 mV 的过电位下。稳定性测试证实了该催化剂在碱性介质中具有显着的长期 OER 和 HER 稳定性。此外，Fe ₃ O ₄ /RuO ₂ -C催化剂也被用作整体水分解的阴极和阳极材料。它在碱性介质中表现出优异的活性和稳定性，电流密度为 10 mA/cm ²，电池电位为 1.595 V。_{Fe 3} O ₄ /RuO ₂的优异电催化活性-C催化剂可归因于其多孔结构、组分之间的协同相互作用、异质界面的存在、高电化学表面积等。这项工作可能为设计双功能电催化剂以开发阴离子交换膜水电解槽提供机会（AEMWE）。

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MOF-Derived Porous Fe3O4/RuO2-C Composite for Efficient Alkaline Overall Water Splitting

Development of highly active, durable, bifunctional electrocatalysts for overall water splitting is of great importance to enhance the use of hydrogen energy. Herein, we synthesize a porous and interfaces-rich Fe₃O₄/RuO₂-C composite from the Metal organic frameworks (MOF) material for overall water splitting in alkaline media. The Fe₃O₄/RuO₂-C catalyst showed superior oxygen evolution reaction (OER) with high faradic efficacy. It requires 268 mV overpotential to achieve the current density of 20 mA/cm². The catalyst also exhibited good hydrogen evolution reaction (HER) with a current density of 10 mA/cm² at an overpotential of 94 mV. The stability test confirmed a remarkable long-term OER and HER stability of this catalyst in alkaline media. In addition, the Fe₃O₄/RuO₂-C catalyst was also used as cathode and anode material for overall water splitting. It showed superior activity and stability in alkaline media with 10 mA/cm² current density at 1.595 V cell potential. The excellent electrocatalytic activity of the Fe₃O₄/RuO₂-C catalyst can be attributed to its porous structure, synergistic interaction between the components, the presence of hetero-interfaces, high electrochemical surface area etc. This work may provide an opportunity to design a bifunctional electrocatalyst for the development of anion exchange membrane water electrolyzers (AEMWEs).

更新日期：2022-05-03

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