Developing the highly active, cost-effective, environmental-friendly, and ultra-stable nonprecious electrocatalysts for hydrogen evolution reaction (HER) is distinctly indispensable for the large-scale practical applications of hydrolytic hydrogen production. Herein, we report the synthesis of well-integrated electrode, NiV layered double hydroxide nanosheet array grown in-situ on porous nickel foam (abbreviated as in-NiV-LDH/NF) via the facile one-step hydrothermal route. Interestingly, the valence configuration of vanadium (V) sites in such NiV-LDH are well dominated by the innovative use of NF as the reducing regulator, achieving the reassembled in-NiV-LDH/NF with a high proportion of trivalent V ions (V³⁺), and then an enhanced intrinsic electrocatalytic HER activity. The HER testing results show that the in-NiV-LDH/NF drives the current densities of 10 and 100 mA cm⁻² at extremely low overpotentials of 114 and 245 mV without iR-compensation respectively, even outperforms commercial 20 wt% Pt/C at the large current density of over 80 mA cm⁻² in alkaline media, as well as gives robust catalytic durability of at least 100 h in both alkaline and neutral media. More importantly, this work provides a fresh perspective for designing bimetal (oxy) hydroxides electrocatalysts with efficient hydrogen generation.

开发用于氢析出反应（HER）的高度活性，成本效益高，环境友好和超稳定的非贵重非电催化剂对于水解氢生产的大规模实际应用显然是必不可少的。在本文中，我们报道了良好集成电极的合成，尼帕层状原位双氢氧化物纳米片阵列上生长的多孔镍泡沫体（简写为在-NiV-LDH / NF）通过容易一步法水热路线。有趣的是，这种NF-LDH中钒（V）位的价构型被NF作为还原性调节剂的创新应用所支配，从而实现了在-NiV-LDH / NF中以高比例的三价V离子（V ³⁺），然后增强内在的电催化HER活性。的HER测试结果表明，在-NiV-LDH / NF驱动的10和100mA厘米的电流密度^-2在114和245毫伏的极低的超电势，而不IR分别-compensation，甚至优于商用20重量％Pt / C在碱性介质中的电流密度超过80 mA cm ^-2时，在碱性和中性介质中均具有至少100 h的强大催化耐久性。更重要的是，这项工作为设计高效生成氢的双金属（氧）氢氧化物电催化剂提供了新的视角。