Exploring high-efficiency electrode for oxygen evolution reaction (OER) is critically important toward the water splitting. In this article, we put forward a novel and facile approach, oxidation and subsequent reduction, for in situ porous and wrinkled treatment of commercial nickel foam to construct a micron rough nickel foam (MRNF). The fabricated MRNF is developed as a current collector to construct an OER composite electrode by depositing nanostructured Co(OH)₂ on its surface via constant voltage deposition method. The results indicate that the porous and wrinkled treatment could obviously increases the contact sites between current collector (MRNF) and active material (Co(OH)₂), leading to a remarkably reduction in charge transfer resistance. The designed MRNF/Co(OH)₂ electrode presents enhanced OER electrocatalysis activity with a low overpotential of 274.4 mV at the current density of 10 mA cm⁻² within alkaline solution. Furthermore, the hierarchical porous and wrinkle structures of the MRNF also significantly improve the mechanical integrity of the electrode, resulting in superior stability.

探索用于氧释放反应（OER）的高效电极对于水分解至关重要。在本文中，我们提出了一种新颖且简便的方法，即氧化和随后的还原，用于对商用镍泡沫进行原位多孔和起皱处理，以构建微米级粗糙镍泡沫（MRNF）。通过恒压沉积法将纳米结构的Co（OH）₂沉积在其表面上，从而将制成的MRNF用作集电器来构建OER复合电极。结果表明，多孔和起皱处理可以明显增加集流体（MRNF）和活性材料（Co（OH）₂）之间的接触部位，从而导致电荷转移电阻显着降低。设计的MRNF / Co（OH）_图2的电极在碱性溶液中在10mA cm ^-2的电流密度下具有增强的OER电催化活性，具有274.4mV的低过电势。此外，MRNF的分层多孔和皱纹结构也显着改善了电极的机械完整性，从而具有出色的稳定性。