A fencelike Co₃O₄@MoO₃ was fabricated successfully via solvent etching strategy for enhanced electrocatalytic hydrogen evolution reaction (HER). Benefiting from the excellent synergistic effect between Co₃O₄ and MoO₃, fencelike Co₃O₄@MoO₃ exhibited enhanced HER performance of low overpotential (158 mV at 10 mA cm⁻²) and small Tafel slope (148 mV dec⁻¹), thereby indicating the higher intrinsic catalytic kinetics in fencelike Co₃O₄@MoO₃. From DFT results, the high electrocatalytic HER performance was attributed to the excellent electronic regulation of Co₃O₄. Simultaneously, MoO₃ could serve as electron transport medium and thus migrate the electron transfer trend of Co₃O₄ → MoO₃ → H₂O. Therefore, an electron-rich region around H₂O was formed due to electrons accumulation, facilitating the decomposition of H₂O. Furthermore, Co₃O₄@MoO₃ showed a more negative E_H2O* (−4.94 eV) than that of Co₃O₄ (6.09 eV) and MoO₃ (1.72 eV). Besides, the d orbital center of Co atom displayed a positive shift from −1.27 to −1.22 eV, demonstrating that Co could directly facilitate the activization and decomposition of H₂O. What’s more, after introducing Co₃O₄ in MoO₃, the H-O bond of H₂O was extended from 0.989 to 0.990 Å, which directly confirmed that the synergistic effect between Co₃O₄ and MoO₃ could facilitate H-O bond breaking.

通过溶剂蚀刻策略成功地制造了栅栏状的 Co ₃ O ₄ @MoO ₃以增强电催化析氢反应 (HER)。受益于 Co ₃ O ₄和 MoO ₃之间出色的协同效应，栅栏状 Co ₃ O ₄ @MoO ₃表现出增强的 HER 性能，即低过电位（10 mA cm ^-2时为 158 mV ）和小 Tafel 斜率（148 mV dec ^{-1 )，从而表明栅栏状 Co} ₃ O ₄ @MoO ₃具有更高的内在催化动力学. 从DFT结果来看，高电催化HER性能归因于Co ₃ O ₄的优异电子调节。同时，MoO ₃可以作为电子传输介质，从而迁移Co ₃ O ₄  → MoO ₃  → H ₂ O的电子转移趋势。因此，由于电子积累，在H ₂ O周围形成了富电子区域，有利于H ₂ O 的分解。此外，Co ₃ O ₄ @MoO _{3显示出比 Co 3} O ₄更负的 E _H2O* (-4.94 eV)(6.09 eV) 和 MoO ₃ (1.72 eV)。此外，Co原子的d轨道中心从-1.27 eV变为-1.22 eV，表明Co可以直接促进H ₂ O的活化和分解。此外，在MoO ₃中引入Co ₃ O ₄后， H ₂ O的HO键从0.989延伸到0.990 Å，这直接证实了Co ₃ O ₄和MoO ₃的协同作用可以促进HO键断裂。