To solve environmental pollution and energy crisis, it is essential to design an efficient, economical, and stable bifunctional electrocatalyst for water splitting to produce renewable energy sources H₂ and O₂. In this study, low-crystallinity and microspherical CoFe-P/NF catalyst synthesized by potentiostat electrodeposition on a foam nickel substrate had an excellent hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and water splitting performance. In 1 M KOH solution, the CoFe-P/NF required the overpotentials of 45 mV for HER and 287 mV for OER in order to create a current density of 10 mA cm⁻². Furthermore, the Tafel slope for HER and OER was measured as 35.4 and 43.2 mV dec^-1, respectively. Serving as the bifunctional catalysts, the CoFe-P/NF electrode couple displays a low voltage of only 1.58 V at 10 mA cm⁻² with an excellent long-term stability. Such remarkably properties of the CoFe-P/NF are attributed to the crystalline-amorphous phase structure, the synergistic effect of Co, Fe and P, and rapid separation of bubbles from the electrode surface. In summary, this study provides a new method for developing cost-effective catalyst towards green hydrogen production via water splitting.

为解决环境污染和能源危机，设计一种高效、经济、稳定的双功能水分解电催化剂以生产可再生能源H ₂和O ₂至关重要。在这项研究中，通过恒电位电沉积在泡沫镍基底上合成的低结晶度和微球状 CoFe-P/NF 催化剂具有优异的析氢反应 (HER)、析氧反应 (OER) 和水分解性能。在 1 M KOH 溶液中，CoFe-P/NF 需要 45 mV 的 HER 和 287 mV 的 OER 过电势才能产生 10 mA cm ^-2的电流密度。此外，HER 和 OER 的 Tafel 斜率测量为 35.4 和 43.2 mV dec ^-1， 分别。作为双功能催化剂，CoFe-P/NF 电极对在 10 mA cm ^-2下显示出仅 1.58 V 的低电压，具有出色的长期稳定性。CoFe-P/NF的这种显着特性归因于结晶-非晶相结构、Co、Fe和P的协同作用以及气泡从电极表面的快速分离。总之，本研究为开发经济高效的水分解制氢催化剂提供了一种新方法。