Hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are the two branches of artificial overall water splitting (OWS), in which the reaction efficiency usually depends on different specific catalysts. Although effective bifunctional electrocatalyst for OWS (HER and OER) are highly desired, designing and constructing such suitable materials is full of challenges to overcome several difficulties, involving slow kinetics, differences in catalytic mechanisms, large overpotential values, and low round-trip efficiencies. In this work, we reported a new bifunctional electrocatalyst Ru/RuO₂-MoO₂ catalyst (RRMC) via a redox solid phase reaction (RSPR) strategy to achieve the high electrocatalytic activity of OWS. Briefly, due to the restricted transport behavior of atoms in solid state precursor, the designed redox reaction occurred between the adjacent part of RuO₂ and MoS₂, forming Ru/RuO₂ hybrid NPs and MoO₂ plane. Therefore, the newly formed Ru/RuO₂ hybrid NPs and MoO₂ plane were tightly combined and used as an electrocatalyst for OWS. Benefiting from the exposed active sites and optimized electronic structure, the RRMC sample annealed at 500 °C (RRMC-500) exhibited low overpotential for HER (18 mV) and for OER (260 mV) at 10 mA cm⁻² under alkaline conditions. Especially, a low cell voltage of 1.54 V was required at 10 mA cm⁻² under alkaline condition.

析氢反应（HER）和析氧反应（OER）是人工全分解水（OWS）的两个分支，其中反应效率通常取决于不同的特定催化剂。尽管非常需要用于 OWS（HER 和 OER）的有效双功能电催化剂，但设计和构建此类合适的材料充满挑战，需要克服多个困难，包括动力学缓慢、催化机制不同、过电位值大和往返效率低。在这项工作中，我们报道了一种新型双功能电催化剂 Ru/RuO ₂ -MoO ₂催化剂 (RRMC) 通过氧化还原固相反应 (RSPR) 策略实现 OWS 的高电催化活性。简而言之，由于固态前驱体中原子的传输行为受限，设计的氧化还原反应发生在RuO ₂和MoS ₂的相邻部分之间，形成Ru/RuO ₂杂化NPs和MoO ₂平面。因此，新形成的Ru/RuO ₂杂化NPs和MoO ₂平面紧密结合并用作OWS的电催化剂。受益于暴露的活性位点和优化的电子结构，在 500 °C (RRMC-500) 下退火的 RRMC 样品在 10 mA cm ^{-2 下}对 HER (18 mV) 和 OER (260 mV) 表现出低过电位在碱性条件下。特别是，在碱性条件下，10 mA cm ^-2需要 1.54 V 的低电池电压。