Developing a noble-metal-free robust and effective electrocatalyst with enhanced active sites for overall water splitting is of great significance yet challenging. Here we demonstrate a bifunctional ultrathin Ni₂P nanosheet electrocatalyst through a microwave-assisted method and phosphorization process. The as-prepared Ni₂P nanosheets present low overpotentials (η₁₀) of 96 and 255 mV for the hydrogen evolution reaction (HER) and oxygen evolution (OER) at a current density of 10 mA cm⁻² in a basic medium. Remarkably, the overall water splitting electrolyzer exhibits a low cell voltage of 1.47 V to achieve a current density of 10 mA cm⁻² in 1 M KOH with outstanding stability. Our facile and unique synthetic protocol and highly active material will open the avenue for further application of water splitting devices.

中文翻译：

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用于全水分解的双功能超薄磷化镍纳米片电催化剂的制备

开发具有增强的活性位点的无贵金属的坚固有效的电催化剂，用于整体水分解具有重要意义，但仍具有挑战性。在这里，我们通过微波辅助方法和磷化过程展示了一种双功能超薄Ni ₂ P纳米片状电催化剂。所制备的Ni ₂ P纳米片本发明的低的超电势（η ₁₀）96和255毫伏为析氢反应（HER）和析氧（OER）以10mA cm 2的电流密度^-2在碱性介质中。值得注意的是，整个水分解电解槽的电池电压低至1.47 V，电流密度为10 mA cm ^-2在1 M KOH中具有出色的稳定性。我们简便而独特的合成方案和高活性材料将为进一步应用分水装置开辟道路。