The challenge of simultaneously boosting two half-reactions for overall water splitting using a catalyst with excellent activity, good durability, and cost-effectiveness is still attracting great interest from the scientific community. Herein, a novel electrocatalyst was fabricated via a facile synthesis strategy for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The electrocatalyst was designed by dual-coupling iron and Ni₂P into P-doped porous carbon (PC) sheets, which were uniformly shelled over one-dimensional copper sulfide (Cu_xS) arrays to form a unique nanobrush architecture. The synergistic effects between the iron and ultrasmall Ni₂P nanoparticles offered a dominant contribution to the catalytic activities with a low required overpotential of 112.9 mV to reach 10 mA cm⁻² for the HER and 330 mV to reach 50 mA cm⁻² for the OER, superior to bare Cu_xS and Ni₂P@PC/Cu_xS. An electrolyzer cell originated from Fe-Ni₂P@PC/Cu_xS electrodes required a small cell voltage of 1.62 V at a current response of 10 mA cm⁻², which even interestingly surpassed recently reported ones. The excellent performance of the proposed Fe–Ni₂P@PC/Cu_xS material made it an innovative bifunctional candidate for overall water splitting applications.

使用具有优异的活性，良好的耐久性和成本效益的催化剂来同时促进两个半反应以进行总水分解的挑战仍然引起科学界的极大兴趣。本文中，通过简便的合成策略，针对氢气析出反应（HER）和氧气析出反应（OER）制备了新型电催化剂。电催化剂是通过将铁和Ni ₂ P双重偶联到掺P的多孔碳（PC）板中而设计的，这些板均匀地剥落在一维硫化铜（Cu _x S）阵列上以形成独特的纳米刷结构。铁与超小Ni ₂的协同作用P纳米粒子对催化活性起了主要作用，HER达到10mA cm ^-2所需的低超电势为112.9 mV，OER达到330 mV达到50 mA cm ^-2，优于裸Cu _x S和Ni ₂ P @ PC / Cu _xS。源自Fe-Ni ₂ P @ PC / Cu _x S电极的电解池，在10 mA cm ^-2的电流响应下，需要1.62 V的小池电压，最近甚至超过了报告的。拟议的Fe–Ni ₂ P @ PC / Cu _x的优异性能S材料使其成为用于整体水分解应用的创新双功能候选材料。