A significant issue in the overall water splitting process is the development of bifunctional non-precious metal catalysts with high performance. Herein, we designed and synthesized heterogeneous structure of Co_5.47N/MoN (Co-Mo-N) porous nanosheets in situ grown on nickel foam substrates by thermal ammonolysis of CoMoO₄ precursors. The special heterogeneous and porous nanosheet structure of Co-Mo-N not only provides abundance of active sites, but also accelerates the charge transfer due to the interaction between Co_5.47N and MoN. Additionally, the differing energy band configurations of the various phases in heterostructure will cause charge transport at the interface, which would be advantageous for the surface electron modification of heterojunctions and further enhances the electrocatalytic performance. As a result, the Co-Mo-N heterostructure exhibited excellent OER and HER catalytic activity, with over potentials of 288 and 82 mV at 10 mA cm⁻², respectively. When using Co-Mo-N heterostructures as cathodes and anodes to achieve overall water splitting, a low voltage of 1.59 V is required to achieve a current density of 10 mA cm⁻². This research presents a novel approach to designing bifunctional non-precious metal catalysts for overall water splitting.

整个水分解过程中的一个重要问题是开发具有高性能的双功能非贵金属催化剂。_{在此，我们通过 CoMoO 4}前驱体的热氨解设计并合成了异质结构的 Co _5.47 N/MoN (Co-Mo-N) 多孔纳米片原位生长在泡沫镍基板上。Co-Mo-N特殊的异质多孔纳米片结构不仅提供了丰富的活性位点，而且由于Co 5.47 之间的相互作用加速了电荷_转移N 和 MoN。此外，异质结构中各相不同的能带构型会导致界面电荷传输，这有利于异质结的表面电子修饰，进一步提高电催化性能。因此，Co-Mo-N 异质结构表现出优异的 OER 和 HER 催化活性，在 10 mA cm ^-2下的过电位分别为 288 和 82 mV 。当使用Co-Mo-N异质结构作为正极和负极实现全水分解时，需要1.59 V的低电压才能实现10 mA cm ^-2的电流密度。本研究提出了一种设计用于全水分解的双功能非贵金属催化剂的新方法。