The development of an electrocatalyst for the efficient catalysis of methanol or urea is essential for solving energy and environmental problems. This study successfully synthesizes nickel selenide and 3D nickel diselenide architectures on N-doped carbon using a NaCl-assisted method and selenization temperature regulation. The 3D architecture of the nickel diselenide with N-doped carbon obtained by selenization at 450 °C (NiSe₂/NC-450) is a useful electrocatalyst for the methanol oxidation reaction (MOR) and urea oxidation reaction (UOR). This NiSe₂/NC-450 electrode displays good catalytic activity for MOR (high peak current density of ~164.68 mA cm⁻², low oxidation potential of ~1.33 V at 10 mA cm⁻²) and UOR (high peak current density of ~136.04 mA cm⁻², low oxidation potential of ~1.32 V at 10 mA cm⁻²). The strong methanol and urea reaction performance of NiSe₂/NC-450 is attributed to the expanded electrochemically active area after selenization and the enhanced conductivity after N-doped carbon. This study provides a new way to prepare and utilize inexpensive transition metal-based materials as efficient and stable anodic oxidation electrocatalysts.

开发用于高效催化甲醇或尿素的电催化剂对于解决能源和环境问题至关重要。本研究使用 NaCl 辅助方法和硒化温度调节成功地在 N 掺杂碳上合成了硒化镍和 3D 二硒化镍结构。通过在 450 °C 下硒化获得的具有 N 掺杂碳的二硒化镍的 3D 结构（NiSe ₂ /NC-450）是甲醇氧化反应 (MOR) 和尿素氧化反应 (UOR) 的有用电催化剂。这种 NiSe ₂ /NC-450 电极对 MOR 显示出良好的催化活性（~164.68 mA cm ^{-2 的}高峰值电流密度，在 10 mA cm ^{-2 时的}低氧化电位~1.33 V) 和 UOR（~136.04 mA cm ^{-2 的}高峰值电流密度，10 mA cm ^{-2 时}~1.32 V 的低氧化电位）。NiSe ₂ /NC-450强大的甲醇和尿素反应性能归因于硒化后电化学活性区域的扩大和 N 掺杂碳后导电性的增强。该研究为制备和利用廉价的过渡金属基材料作为高效稳定的阳极氧化电催化剂提供了一种新方法。