The synthesis and characterization of thorn-shaped nickel cobaltite nanoparticles (NiCo₂O₄) via a simple, rapid hydrothermal synthesis method for different reaction durations of 7 h and 14 h, denoted as NCo-7 and NCo-14, are reported. Scanning and transmission electron microscopy images reveal that the synthesized NiCo₂O₄ sample shows a thorn-like morphology. Compared to NCo-7, NCo-14 exhibits good capacitive performance, with a large specific capacitance. The NCo-14 electrocatalyst exhibited excellent activity toward the oxygen evolution reaction and electrooxidation of methanol in alkaline medium.

中文翻译：

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刺形NiCo ₂ O ₄纳米颗粒作为电化学应用的多功能电催化剂

据报道，通过简单，快速的水热合成方法，在7 h和14 h的不同反应时间（分别为NCo-7和NCo-14）上合成了刺状镍钴矿纳米粒子（NiCo ₂ O ₄）。扫描和透射电子显微镜图像显示，合成的NiCo ₂ O ₄样品显示出刺状的形态。与NCo-7相比，NCo-14具有良好的电容性能，并且具有较大的比电容。NCo-14电催化剂在碱性介质中对氧释放反应和甲醇的电氧化表现出优异的活性。