We present a facile way to fabricate phosphorus and aluminum codoped nickel oxide-based nanosheets by using layered double hydroxide (AlNi-LDH) as precursors, which showed an overall water-splitting performance in alkaline solution. The codoping of phosphorus and aluminum into nickel oxide nanosheets leads to an optimum balance among surface chemical state, electrochemically active surface area, and density of active sites. As a result, it can afford a current density of 100 mA cm^–2 at the overpotential of 310 mV for oxygen evolution reaction (OER) and a current density of 10 mA cm^–2 at the overpotential of 138 mV for hydrogen evolution reaction (HER) in 1 M KOH. When it was used as a bifunctional catalyst in a two-electrode water-splitting device, a potential of 1.56 V was achieved at the current density of 10 mA cm^–2.

中文翻译：

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磷和铝共掺杂的多孔NiO纳米片作为高效的整体水分解电催化剂

我们提出了一种通过使用层状双氢氧化物（AlNi-LDH）作为前体来制造磷和铝共掺杂的氧化镍基纳米片的简便方法，该方法在碱性溶液中表现出整体的水分解性能。将磷和铝共掺杂到氧化镍纳米片中可导致表面化学状态，电化学活性表面积和活性位点密度之间的最佳平衡。结果，在310 mV的过电位下，对于氧气析出反应（OER），可以提供100 mA cm ^–2的电流密度和10 mA cm ^–2的电流密度在1 M KOH中氢释放反应（HER）的138 ​​mV的超电势下。当将其用作双电极水分解装置中的双功能催化剂时，在10 mA cm ^–2的电流密度下可达到1.56 V的电势。