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：

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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 和高导电性碳材料科琴黑 (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，其中在 10 mA / cm ²下的过电位和在 1.7 V _{RHE 下}的电流密度记录为 0.274 V _RHE和 650 mA / cm ²，分别为 1 mol/L KOH。特别是，在施加的阳极偏压下，来自 MOF 的镍铁簇的活化稳定地提高了 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改，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各种金属有机配合物以高能量转换效率制造电极。