The NiFe layered double hydroxide (LDH) with lamellar structure is beneficial to exposure more active sites. It shows high OER catalytic activity and stability under alkaline conditions, which makes it one of the hot spots in OER catalysts. The intrinsic electrocatalytic activity of the NiFe LDH can be further improved via doping to tailor surface electronic structure and valence state. The NiFe-V_x catalysts were prepared by one-step hydrothermal method. Compared with that of undoped NiFe LDH, the oxygen evolution overpotential of NiFe-V_1.0 was reduced by 37 mV at a current density of 10 mA cm⁻², the Tafel slope is decreased by 43.37 mV dec⁻¹. The results demonstrated that V doping can enhance the electron transfer of LDH, and increase the electrochemical active surface area, leading to the enhanced OER activity.

层状结构的 NiFe 层状双氢氧化物 (LDH) 有利于暴露更多的活性位点。它在碱性条件下表现出较高的OER催化活性和稳定性，使其成为OER催化剂的热点之一。NiFe LDH 的固有电催化活性可以通过掺杂来调整表面电子结构和价态来进一步提高。NiFe-V _x催化剂采用一步水热法制备。与未掺杂的 NiFe LDH 相比，在 10 mA cm ^-2的电流密度下，NiFe-V _{1.0 的}析氧过电位降低了 37 mV ，塔菲尔斜率降低了 43.37 mV dec ^-1. 结果表明，V掺杂可以增强LDH的电子转移，增加电化学活性表面积，从而增强OER活性。