A Highly-Efficient Oxygen Evolution Electrocatalyst Derived from a Metal-Organic Framework and Ketjenblack Carbon Material,ChemPlusChem

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A Highly-Efficient Oxygen Evolution Electrocatalyst Derived from a Metal-Organic Framework and Ketjenblack Carbon Material
ChemPlusChem ( IF 3.0 ) Pub Date : 2021-07-01 , DOI: 10.1002/cplu.202100278
Seçil Öztürk ₁ , Gun-Hee Moon _{2,

3} , Alex Spieß ₁ , Eko Budiyanto ₂ , Stefan Roitsch ₄ , Harun Tüysüz ₂ , Christoph Janiak ₁

Affiliation

The composite of the metal-organic framework (MOF) Ni(Fe)-MOF-74 and the highly conductive carbon material ketjenblack (KB) could be easily obtained from the in-situ MOF synthesis in a one-step solvothermal reaction. The composite material features a remarkable electrochemical oxygen evolution reaction (OER) performance where the overpotential at 10 mA/cm² and the current density at 1.7 V_RHE are recorded as 0.274 V_RHE and 650 mA/cm², respectively, in 1 mol/L KOH. In particular, the activation of nickel-iron clusters from the MOF under an applied anodic bias steadily boosts the OER performance. Although Ni(Fe)-MOF-74 goes through some structural modification during the electrochemical measurements, the stabilized and optimized composite material shows excellent OER performance. This simple strategy to design highly-efficient electrocatalysts, utilizing readily available precursors and carbon materials, will leverage the use of diverse metal-organic complexes into electrode fabrication with a high energy conversion efficiency.

中文翻译：

一种源自金属有机骨架和科琴黑碳材料的高效析氧电催化剂

金属有机骨架（MOF）Ni（Fe）-MOF-74和高导电碳材料科琴黑（KB）的复合材料可以通过一步溶剂热反应的原位MOF合成轻松获得。该复合材料具有显着的电化学析氧反应（OER）性能，在1 mol/ 摩尔浓度下，10 mA/cm ²下的过电位和1.7 V _RHE下的电流密度分别为0.274 V _RHE和650 mA/cm ² 。 L KOH。特别是，在施加阳极偏压下，MOF 中镍铁簇的活化可稳定提高 OER 性能。尽管Ni(Fe)-MOF-74在电化学测量过程中经历了一些结构修饰，但稳定和优化的复合材料显示出优异的OER性能。这种利用现成的前体和碳材料设计高效电催化剂的简单策略将利用多种金属有机配合物来制造具有高能量转换效率的电极。

更新日期：2021-08-17

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