Although water electrolysis is one of the most environmentally friendly methods for producing hydrogen (H₂) and oxygen, designing robust non-noble electrocatalysts for overall water splitting remains a massive challenge. Modulating the morphology and chemical composition of non-noble-metal bifunctional electrocatalysts is an effective way to enhance catalytic activity in water electrolysis. Herein, a robust electrocatalyst with porous CoP₄/Co₄S₃ microcubes rich in defects was synthesized through the phosphorylation and hydrothermal vulcanization of a Co–Co Prussian blue analog (Co–Co PBA). Given that the as-prepared CoP₄/Co₄S₃ microcubes can provide additional active sites to accelerate electron transfer at the heterointerface, they exhibit enhanced catalytic activities in hydrogen and oxygen evolution reactions in 1.0 M KOH. When used as a bifunctional catalyst in a two-electrode electrolyzer, the micrucubesrequire a cell voltage of 1.67 V to achieve a current density of 10 mA cm⁻² in 1.0 M KOH, indicating its potential as an efficient alkaline non-noble electrocatalyst for overall water splitting. This study provides a promising electrocatalyst for clean H₂ energy production by modulating its morphology and chemical composition.

_{尽管水电解是生产氢气 (H 2} ) 和氧气的最环保的方法之一，但设计用于整体水分解的坚固的非贵金属电催化剂仍然是一个巨大的挑战。调节非贵金属双功能电催化剂的形貌和化学组成是提高水电解催化活性的有效途径。_{在此，通过Co-Co普鲁士蓝类似物（Co-Co PBA）的磷酸化和水热硫化合成了一种具有富含缺陷的多孔CoP 4} /Co ₄ S ₃微立方体的坚固电催化剂。由于所制备的CoP ₄ /Co ₄ S ₃微立方体可以提供额外的活性位点来加速异质界面上的电子转移，因此它们在1.0 M KOH中的析氢和析氧反应中表现出增强的催化活性。当在双电极电解槽中用作双功能催化剂时，微立方体需要1.67 V的电池电压才能在1.0 M KOH中实现10 mA cm ^-2的电流密度，表明其作为整体高效碱性非贵重电催化剂的潜力。水分解。这项研究通过调节其形态和化学成分，为清洁H ₂能源生产提供了一种有前景的电催化剂。