The in situ growth of nano-array on material structure is a novel and high-efficient strategy to design catalysts, however, it still remains a challenge to fabricate unique nano-architecture electrocatalyst with prominent activity and superior durability for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Herein, a unique nano-architecture catalyst is successfully synthesized by using NiFe LDH nanosheets as framework to the in situ growth Mo-doped Ni₂P ultrafine nanosheets (marked as Mo-Ni₂[email protected] LDH/NF). The unique 3D core-shell nano-architecture is favorable for enhancing electron transfer/mass diffusion, providing abundant active sites, prompting O₂/H₂ gas release, and creating the synergistic effect between Mo-Ni₂P and NiFe LDH. Therefore, comparing with pure NiFe LDH/NF and Mo-Ni₂P/NF electrodes, walnut-like Mo-Ni₂[email protected] LDH/NF catalyst exhibits significantly improved electrocatalytic activities and durability towards OER (269 mV @ 40 mA cm⁻²), HER (82 mV @ 10 mA cm⁻²), and overall water splitting (1.46 V @ 10 mA cm⁻²), respectively. Such electrocatalytic activity of Mo-Ni₂[email protected] LDH/NF is comparable with that of majority reported non-precious metal catalysts and even precious catalysts (IrO₂ and Pt/C). This work presents a new perspective strategy to fabricate ingeniously bifunctional electrocatalysts with well-designed structure and superior performance for clean energy conversion technologies or storage devices.

纳米阵列在材料结构上的原位生长是设计催化剂的一种新颖而高效的策略，但是，仍然难以制造出独特的纳米结构电催化剂，该催化剂具有出色的活性和对氧析出反应（OER）的出色耐久性。和析氢反应（HER）。本文中，以NiFe LDH纳米片为框架，原位生长Mo掺杂的Ni ₂ P超细纳米片（标记为Mo-Ni ₂ [受电子邮件保护] LDH / NF），成功合成了独特的纳米结构催化剂。独特的3D核壳纳米结构有利于增强电子转移/质量扩散，提供丰富的活性位点，促使O ₂ / H ₂气体释放，并在Mo-Ni ₂ P和NiFe LDH之间产生协同效应。因此，与纯NiFe LDH / NF和Mo-Ni ₂ P / NF电极相比，胡桃状的Mo-Ni ₂ [受电子邮件保护] LDH / NF催化剂显示出显着改善的电催化活性和对OER的耐久性（269 mV @ 40 mA cm ^-2），HER（82 mV @ 10 mA cm ^-2）和总水分解（1.46 V @ 10 mA cm ^-2）。Mo-Ni ₂ [受电子邮件保护] LDH / NF的这种电催化活性与大多数报道的非贵金属催化剂甚至是贵催化剂（IrO ₂和Pt / C）。这项工作提出了一种新的远景战略，旨在为清洁能源转换技术或存储设备制造具有精心设计的结构和卓越性能的巧妙的双功能电催化剂。