Herein, we report a simple solvothermal process to synthesize a series of Fe_xNi_1–x-glycerolates (FeNiGly, x = 0, 0.25, 0.5, 0.75, and 1) and explore them as high-performance electrocatalysts for oxygen evolution reaction (OER) in alkaline media. These FeNiGly samples bear unique structures of hierarchical microspheres assembled by the interlaced ultrathin nanosheets or loosely aggregated nanoparticles, which ensure the electrocatalytic systems more efficient and accessible for the OER process. The FeNiGly exhibits an excellent OER activity with quite low overpotential of ∼320 and ∼380 mV to achieve the current density of 10 and 50 mA cm^–2 in 1.0 M KOH solutions, respectively. Moreover, the FeNiGly also presents a good durability in alkaline electrolytes. The superior OER performance would be associated with the unique structures and strong electronic interaction between Fe and Ni in the FeNiGly.

中文翻译：

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层状双金属铁-镍醇盐微球作为碱性介质中氧释放反应的高性能电催化剂

本文中，我们报告了一种简单的溶剂热过程，以合成一系列Fe _x Ni _{1- x-}甘油酸酯（FeNiGly，x = 0、0.25、0.5、0.75和1），并将其作为用于氧释放反应的高性能电催化剂进行研究（ OER）在碱性介质中。这些FeNiGly样品具有由交错的超薄纳米片或松散聚集的纳米颗粒组装而成的分层微球的独特结构，可确保电催化系统更高效且可用于OER工艺。FeNiGly具有出色的OER活性，具有约320和380 mV的相当低的过电势，可实现10和50 mA cm ^–2的电流密度分别在1.0 M KOH溶液中。此外，FeNiGly在碱性电解液中也表现出良好的耐久性。优异的OER性能将与FeNiGly中Fe和Ni之间的独特结构和强电子相互作用相关。