Hierarchically structured bimetallic NiCo‐MOF/LDH/Ni foam (NiCo‐MOF/LDH/NF; MOF=metal−organic framework, LDH=layered double hydroxides) composites were successfully fabricated by means of the in situ growth of NiCo‐MOF on the NiCo LDH buffer‐layer‐modified NF surface. After carbonization, the derived NiCo alloy@C/Ni_xCo_1‐xO/NF hierarchical nanocomposite showed excellent electrocatalytic activity with respect to the oxygen evolution reaction (OER); specifically, it exhibited a very low overpotential of 300 mV at a current density of 100 mA cm⁻². The outstanding OER activity of the composite may be attributed to the open structure of the nanocomposite, the formation of the highly dispersed CoNi alloy, and the synergistic interaction between CoNi@C and Ni_xCo_1‐xO. This work introduces a new strategy for constructing advanced hierarchically structured nanocomposites for diverse applications.

中文翻译：

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双金属MOF膜和衍生的NiCo Alloy @ C / NixCo1-xO / Ni泡沫复合材料的定向生长作为氧析出反应的高效电催化剂

多层结构的双金属NiCo-MOF / LDH / Ni泡沫材料（NiCo-MOF / LDH / NF; MOF =金属有机骨架，LDH =层状双氢氧化物）复合材料是通过在NiCo-MOF上原位生长而成功制备的。 NiCo LDH缓冲层修饰的NF表面。碳化后，衍生的NiCo合金@ C / Ni _x Co _{1‐ x} O / NF分层纳米复合材料对氧释放反应（OER）表现出优异的电催化活性；具体而言，在100 mA cm ^-2的电流密度下，它表现出非常低的300 mV过电势。复合材料出色的OER活性可能归因于纳米复合材料的开放结构，高度分散的CoNi合金的形成以及CoNi @ C和Ni _x Co _{1- x} O之间的协同相互作用。这项工作引入了一种新的策略用于构建适用于各种应用的高级层次结构纳米复合材料。