The exploration of low-cost, high-efficient and robust bifunctional electrocatalysts for water splitting is urgently desired for developing clean hydrogen energy conversion technology. In this work, we present a facile and effective one-step molten salt synthesis tactics to prepare self-supported 1D Ni-Mo based mixed-phase polyionic compounds nanorod arrays (NMNAs). Due to the exposed more active sites of this nanostructure and accelerated charge transfer derived from modulated electronic structures between Ni-Mo, the as-fabricated NMNAs electrodes deliver remarkable bifunctional electrocatalytic water splitting performance, with overpotential values of 234.2 mV at 200 mA cm⁻² and 191.2 mV at 100 mA cm⁻² in 1 M KOH for OER and HER, respectively. Furthermore, the alkaline electrolyzer composed of NMNAs needs a low overall-water-splitting cell voltage of 1.423 V to drive a current density of 10 mA cm⁻². This work will shed light on the preparation of other related self-supporting nanostructured bifunctional electrocatalysts with excellent performance.

为了开发清洁的氢能转化技术，迫切需要探索低成本，高效且坚固的双功能电分解水用电催化剂。在这项工作中，我们提出了一种简便有效的一步熔融盐合成策略，以制备自支撑的一维Ni-Mo基混合相聚离子化合物纳米棒阵列（NMNAs）。由于该纳米结构暴露出更多的活性位，并且由于Ni-Mo之间的调制电子结构产生了加速的电荷转移，因此制成的NMNAs电极具有出色的双功能电催化水分解性能，在200 mA cm ^-2时的超电势值为234.2 mV。和100 mA cm ^-2时为191.2 mV在1 M KOH中分别用于OER和HER。此外，由NMNA组成的碱性电解槽需要1.423V的低的总水分解池电压来驱动10mA cm ^-2的电流密度。这项工作将为其他性能优异的自支撑纳米结构双功能双功能电催化剂的制备提供参考。