Developing low-cost and earth-abundant electrocatalysts with high performance for electrochemical water splitting is a challenging issue. Herein, we report a facile and effective way to fabricate three-dimension (3D) ordered mesoporous Co_1−xFe_xP (x=0, 0.25, 0.5, 0.75) electrocatalyst. Benefiting from 3D ordered mesoporous pore channels and composition optimization, the Co_0.75Fe_0.25P exhibits excellent electrocatalytic activities with low overpotentials of 270 and 209 mV at 10 mA cm⁻² for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), respectively, in the alkaline electrolyte along with a durable electrochemical stability. In addition, as both the cathode and anode, the Co_0.75Fe_0.25P also exhibits superior electrolysis water splitting performance with only an applied voltage of 1.63 V to attain a current density of 10 mA cm⁻² without obvious decay for 18 h, indicating that the Co_0.75Fe_0.25P is an efficient electrocatalyst for overall water splitting.

开发用于电化学水分解的低成本且富含地球的高性能电催化剂是一个具有挑战性的问题。在此，我们报告了一种简便有效的方法来制造三维（3D）有序介孔Co _{1- x} Fe _x P （x = 0，0.25，0.5，0.75）电催化剂。受益于3D有序介孔通道和成分优化，Co _0.75 Fe _0.25 P表现出出色的电催化活性，在10 mA cm ^-2时具有270和209 mV的低过电势在碱性电解液中分别用于氧释放反应（OER）和氢释放反应（HER），以及持久的电化学稳定性。此外，作为正极和负极，Co _0.75 Fe _0.25 P还具有优异的电解水分解性能，仅施加1.63 V的电压即可达到10 mA cm ^-2的电流密度，并且在18 h内无明显衰减。 Co _0.75 Fe _0.25 P是一种有效的整体水分解电催化剂。