Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, College of Chemistry & Chemical Engineering, Hubei University, Youyi Avenue 368#, Wuhan, 430062, P. R. China.
Jiangxi Provincial Key Laboratory of Low-Carbon Solid Waste Recycling, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, 341000, P. R. China.
Small. 2023 Jun;19(24):e2208276. doi: 10.1002/smll.202208276. Epub 2023 Mar 15.
Binary metal nickel-iron alloys have been proven to have great potential in oxygen evolution reaction (OER) electrocatalysis, but there are still certain challenges in how to construct more efficient nickel-iron alloy electrocatalysts and maximize their own advantages. In this work, a heterometallic nickel-iron cluster (L = C H Fe N Ni O ) of Schiff base (LH = 2-amino-1,3-propanediol salicylaldehyde) is designed as a precursor to explore its behavior in the pyrolysis process under inert atmosphere. The combination of TG-MS, morphology, and X-ray characterization techniques shows that the Schiff base ligands in the heterometallic clusters produces a strong reductive atmosphere during pyrolysis, which enable the two 3d metals Ni and Fe to form NiFe alloys. Moreover, Fe O /Fe Ni @Cs carbon nanomaterials are formed, in which Fe O /Fe Ni is the potential active material for OER. It is also found that the centrosymmetric structure of the heterometallic Schiff base precursor is potentially related to the formation of the Fe O /Fe Ni alloy@carbon structures. The Fe O /Fe Ni @C-800 provides 274 mV overpotential in 1 m KOH solution at 10 mA cm in OER. This work provides an effective basis for further research on Schiff base bimetallic doping-derived carbon nanomaterials as excellent OER electrocatalysts.
双金属镍铁合金已被证明在析氧反应（OER）电催化中具有巨大的潜力，但如何构建更高效的镍铁合金电催化剂并最大限度地发挥其自身优势仍然存在一定的挑战。在这项工作中，设计了一种Schiff 碱（LH=2-氨基-1,3-丙二醇水杨醛）的杂金属镍铁簇（L=CHFeNNiO）作为前体，以探索其在惰性气氛下热解过程中的行为。TG-MS、形貌和 X 射线表征技术的结合表明，杂金属簇中的Schiff 碱配体在热解过程中产生了强烈的还原气氛，使两种 3d 金属 Ni 和 Fe 形成了 NiFe 合金。此外，形成了 FeO/FeNi@Cs 碳纳米材料，其中 FeO/FeNi 是 OER 的潜在活性材料。还发现，杂金属 Schiff 碱前体的中心对称结构可能与 FeO/FeNi 合金@碳结构的形成有关。在 1m KOH 溶液中，FeO/FeNi@C-800 在 OER 中提供了 274 mV 的过电势，电流密度为 10 mA cm。这项工作为进一步研究席夫碱双金属掺杂衍生的碳纳米材料作为优异的 OER 电催化剂提供了有效的基础。
