Transition metal phosphides have recently been regarded as robust, inexpensive electrocatalysts for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). Thus far, tremendous scientific efforts have been applied to improve the catalytic activity of the catalyst, whereas the scale-up fabrication of morphology-controlled catalysts while maintaining their desired performance remains a great challenge. Herein, we present a facile and scalable approach to fabricate the macroporous Ni₂P/nickel foam electrode. The obtained electrocatalyst exhibits superior bifunctional catalytic activity and durability, as evidenced by a low overpotential of 205 and 300 mV required to achieve a high current density of 100 mA cm^–2 for HER and OER, respectively. Such a spray-based strategy is believed to widely adapt for the preparation of electrodes with uniform macroporous structures over a large area (e.g., 100 cm²), which provides a universal strategy for the mass fabrication of high performance water-splitting electrodes.

中文翻译：

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大面积合成高效水分解Ni ₂ P蜂窝状电极

过渡金属磷化物最近已被认为是用于氢气释放反应（HER）和氧气释放反应（OER）的坚固，廉价的电催化剂。迄今为止，已经进行了巨大的科学努力来提高催化剂的催化活性，而在保持所需性能的同时，按比例放大制备形态控制的催化剂仍然是巨大的挑战。在这里，我们提出了一种方便且可扩展的方法来制造大孔Ni ₂ P /镍泡沫电极。所获得的电催化剂显示出优异的双功能催化活性和耐久性，这证明了，要实现100 mA cm ^–2的高电流密度，需要低的205和300 mV的超电势分别用于HER和OER。据信这种基于喷雾的策略广泛适用于在大面积（例如100cm ²）上具有均匀大孔结构的电极的制备，这为大规模制造高性能水分解电极提供了通用策略。