Developing highly-efficient and low-cost electrocatalysts act as pressing impacts on the flourishing of hydrogen energy, including electrochemical water splitting is a kind of prevailing energy conversion technology. However, it is hampered by the high activation barrier of oxygen evolution reaction (OER). Herein, a hybrid electrocatalyst with trifunctional and 3D core–shell structure is designed by hydrothermal process in order to achieve outstanding OER, hydrogen evolution reaction (HER) and urea oxidation reaction (UOR) properties. NiSe@MoS₂/NF catalyst is composed of the heterogeneous interface formed by NiSe nanowire arrays which supported by nickel foam and MoS₂ nanosheets. The synergistic effect and strong electronic interaction between the interface display the dominant impact of OER, HER and UOR. Especially in basic electrolyte, the potential is as low as 310 mV at 100 mA cm⁻², even Tafel slope is 70.8 mV dec^-1, representing the predominant OER property. The HER and UOR also demonstrate enormous prospect with 210, 233 mV at 100 mA cm⁻². When NiSe@MoS₂/NF||NiSe@MoS₂/NF catalyst as anode and cathode, only requires potential of 1.48 V at 10 mA cm⁻² for overall water splitting test. The work offers a plain, high-efficiency and inexpensive method to evolve the progressive trifunctional electrocatalysts for other energy-related applications.

开发高效低成本的电催化剂对氢能的蓬勃发展有着迫切的影响，其中电化学水分解是一种流行的能量转换技术。然而，它受到析氧反应（OER）的高活化势垒的阻碍。在此，通过水热法设计了一种具有三功能和 3D 核壳结构的混合电催化剂，以实现出色的 OER、析氢反应 (HER) 和尿素氧化反应 (UOR) 性能。NiSe@MoS _{2 /NF催化剂由泡沫镍和MoS 2}负载的NiSe纳米线阵列形成的异质界面组成纳米片。界面之间的协同效应和强烈的电子相互作用显示出OER、HER和UOR的主导影响。^{特别是在碱性电解质中，在 100 mA cm -2}时的电势低至 310 mV ，甚至 Tafel 斜率为 70.8 mV dec ^-1，代表了主要的 OER 特性。HER 和 UOR 也显示出巨大的前景，在 100 mA cm ^-2下为 210、233 mV 。当NiSe@MoS ₂ /NF||NiSe@MoS ₂ /NF催化剂作为阳极和阴极时，仅需要1.48 V at 10 mA cm ^-2的电位即可进行全水分解测试。这项工作提供了一种简单、高效且廉价的方法来为其他能源相关应用开发渐进式三功能电催化剂。