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首页> 外文期刊>RSC Advances >Preparation of an Fe2Ni MOF on nickel foam as an efficient and stable electrocatalyst for the oxygen evolution reaction
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Preparation of an Fe2Ni MOF on nickel foam as an efficient and stable electrocatalyst for the oxygen evolution reaction

机译：在泡沫镍上制备Fe2Ni MOF，作为一种高效稳定的氧释放反应电催化剂

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Metal–organic frameworks (MOFs) as versatile templates for preparing transition metal compounds has received wide attention. Benefiting from their diversified spatial structure and controllable chemical constituents, they have become a research hotspot in the field of electrocatalytic water splitting. Herein, Fe _(2) Ni-MIL-88B MOF on nickel foam (Fe _(2) Ni MOF/NF) has been prepared through a one-pot method growth process. Compared with Fe MOF/NF and Ni MOF/NF, the interaction between Fe ~(3+) and Ni ~(2+) in Fe _(2) Ni MOF/NF accelerates the electron transfer through the oxygen of the ligand, leading to increased 3d orbital electron density of Ni, which enhances the activity of the oxygen evolution reaction (OER) in alkaline solution. Fe _(2) Ni MOF/NF provides a current density of 10 mA cm ~(?2) at a low overpotential of 222 mV, and its Tafel slope is also very small, reaching 42.39 mV dec ~(?1) . The success of the present Fe _(2) Ni MOF/NF catalyst is attributed to the abundant active centers, the bimetallic clusters Fe _(2) Ni-MIL-88B, the positive coupling effect between Ni and Fe metal ions in the MOF, and synergistic effect between the MOF and NF. Besides, Fe _(2) Ni MOF/NF possesses excellent stability over 50 h of continuous operation, providing feasibility for commercial use.
机译：金属有机框架（MOF）作为制备过渡金属化合物的通用模板受到了广泛的关注。得益于其多样化的空间结构和可控的化学成分，它们已成为电催化水分解领域的研究热点。在此，已经通过一锅法生长工艺制备了在泡沫镍上的Fe _（2）Ni-MIL-88B MOF（Fe _（2）Ni MOF / NF）。与Fe MOF / NF和Ni MOF / NF相比，Fe _（2）Ni MOF / NF中Fe〜（3+）和Ni〜（2+）之间的相互作用加速了电子通过配体的氧转移，导致可以增加镍的3d轨道电子密度，从而增强碱性溶液中氧释放反应（OER）的活性。 Fe _（2）Ni MOF / NF在222 mV的低过电势下提供10 mA cm〜（？2）的电流密度，并且它的Tafel斜率也很小，达到42.39 mV dec〜（？1）。当前Fe _（2）Ni MOF / NF催化剂的成功归因于丰富的活性中心，双金属簇Fe _（2）Ni-MIL-88B，MOF中Ni和Fe金属离子之间的正耦合效应，以及MOF和NF之间的协同效应。此外，Fe _（2）Ni MOF / NF在连续运行50小时内具有出色的稳定性，为商业应用提供了可行性。

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