A low-cost, highly efficient and strong durable bifunctional electrocatalyst is crucial for electrochemical overall water splitting. In this paper, a self-templated strategy combined with in-situ phosphorization is applied to construct hollow structured bimetallic cobalt-nickel phosphide (CoN-iP_x) nanocages. Owing to their unique hollow structure and bimetallic synergistic effects, the as-synthesized CoNiP_x hollow nanocages exhibit a high electrocatalytic activity and stability towards hydrogen evolution reaction in all-pH electrolyte and a remarkable electrochemical performance for oxygen evolution reaction in 1.0 mol L⁻¹ KOH. Meanwhile, with the bifunctional electrocatalyst in both anode and cath ode for overall water splitting, a low voltage of 1.61 V and superior stability are achieved at a current density of 20 mA cm⁻².

低成本，高效且坚固耐用的双功能电催化剂对于电化学整体水分解至关重要。在本文中，采用自模板技术与原位磷化相结合来构建中空结构的双金属钴镍磷化钴（CoN-iP _x）纳米笼。由于其独特的中空结构和双金属协同作用，这样合成的CoNiP _x中空纳米笼在全pH电解质中显示出高的电催化活性和对氢析出反应的稳定性，并且在1.0 mol L ^-1下对氧析出反应具有显着的电化学性能。啊 同时，利用阳极和阴极中的双功能电催化剂进行总的水分解，在20mA cm ^-2的电流密度下实现了1.61V的低电压和优异的稳定性。