Multi-scale regulation strategies ranging from electronic behavior regulation to crystal structure modulation to micro-nano structure construction can effectively improve the properties of materials, thereby bringing about significant improvements in performance. In this paper, we successfully constructed (Co_1-xNi_x)₃O₄ with Ni substitution (x) unique polyhedral yolk-shell structure (PYSSs) electrocatalysts with confined amorphous regions, and achieved a significant improvement in the performance of oxygen evolution reaction (OER). The substitution of Ni can regulate the electronic coupling between metal sites, thereby optimizing the electronic configuration, creating abundant vacancy defects and enhancing the Co 3d-O 2p covalency. Meantime, the creation of confined amorphous regions can further increase the number of oxygen vacancies and unsaturated metal sites. Especially, the construction of the unique PYSSs structure can increase the effective specific surface area, hold the reaction intermediates for deeper reaction, accelerate the infiltration and transport of the electrolyte, prevent the adhesion of bubbles and accelerate the gas diffusion.

从电子行为调控到晶体结构调制再到微纳结构构建的多尺度调控策略可以有效改善材料的性能，从而带来性能的显着提升。在本文中，我们成功地构建了(Co _{1- x} Ni _x ) ₃ O ₄与Ni取代( x) 独特的多面体蛋黄壳结构 (PYSSs) 电催化剂，具有受限的非晶区域，并在析氧反应 (OER) 性能方面取得了显着改善。Ni的取代可以调节金属位点之间的电子耦合，从而优化电子构型，产生丰富的空位缺陷，增强Co 3d-O 2p共价性。同时，受限非晶区域的产生可以进一步增加氧空位和不饱和金属位点的数量。特别是独特的PYSSs结构的构建，可以增加有效比表面积，容纳反应中间体进行更深层次的反应，加速电解液的渗透和输送，防止气泡粘附，加速气体扩散。