In the preparation of nanomaterials, the kinetics and thermodynamics in the reaction can significantly affect the structures and phases of nanocrystals. Therefore, people are keen to adopt various synthetic strategies to accurately assemble the target nanocrystals, and reveal the underlying mechanism of the formation of specific structures. In this work, the total reaction time is adjusted to let the prepared MnCo Prussian blue analogous (MnCoPBA) crystals show four evolving morphological changes at different stages with the assistance of sodium dodecyl sulfate. Furthermore, it is clearly observed that the epitaxial growth along the (100) plane on the shell of MnCoPBA nanocrystals is favored, and the thermodynamics and kinetics in the morphology change process are analyzed in detail. Through the simple pyrolysis, MnCoPBA crystals can be successfully converted into the corresponding carbon composites, of which Mn₂Co₂C nanoparticles are evenly distributed in highly graphitized carbon matrix. Among them, PBA‐III‐700 performs good oxygen reduction reaction performance in alkaline solution with the half‐wave potential of 0.801 V and diffusion‐limited current density of 5.36 mA cm⁻², and its zinc‐air battery exhibits the peak power density of 103.4 mW cm⁻² competitive with commercial Pt/C.

中文翻译：

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表面活性剂介导的MnCo普鲁士蓝结构的形态演化

在纳米材料的制备中，反应中的动力学和热力学可以显着影响纳米晶体的结构和相。因此，人们渴望采用各种合成策略来准确地组装目标纳米晶体，并揭示特定结构形成的潜在机理。在这项工作中，调整总反应时间以使所制备的MnCo普鲁士蓝类似物（MnCoPBA）晶体在十二烷基硫酸钠的辅助下，在不同阶段显示出四个演变的形态变化。此外，可以清楚地观察到MnCoPBA纳米晶体的壳沿（100）面外延生长是有利的，并且详细分析了形态变化过程中的热力学和动力学。通过简单的热解，₂ Co ₂ C纳米颗粒均匀分布在高度石墨化的碳基质中。其中，PBA-III-700在碱性溶液中具有良好的氧还原反应性能，半波电位为0.801 V，扩散极限电流密度为5.36 mA cm ^-2，其锌空气电池表现出峰值功率密度103.4 mW cm ^{-2的光强可}与商业Pt / C竞争。