Developing high-efficient and earth-abundant metals for the oxygen evolution reaction catalyst is of significant and promising but still challenging. Prussian blue analogs (PBAs) show great potential for the dispersion and exposure of OER catalysts due to their adjustable element compositions and easily decomposable structures. Herein, bimetallic Ni–Co Prussian blue analogs grown on the conductive nickel foam supported by Ni(OH)₂ nanosheets are designed and constructed. Firstly, the uniform dispersion of Ni–Co Prussian blue analogs has been realized on the surface of NF. By means of the confined decomposition of PBAs at calcination temperature, NiSe₂/CoSe with the smaller particle size and good dispersion supported on NF can provide the more active sites when containing high electron transfer rate. The oxygen evolution reaction (OER) measurements show that the as-prepared NiSe₂/CoSe/NF exhibits the very impressive OER activity with low overpotential of 270 mV to reach the current density of 100 mA/cm². The special nanoarrays structure, abundant active sites and high intrinsic activity may contribute to the excellent performance. The synergistic effect of nickel-cobalt selenide and support enable superior stability toward OER. This confined decomposition strategy may provide a promising way to controlled assembly of transition metal-based electrocatalyst for OER.

开发用于氧释放反应催化剂的高效且富于地球的金属具有重大意义和前景，但仍具有挑战性。普鲁士蓝类似物（PBA）具有可调节的元素组成和易于分解的结构，因此在OER催化剂的分散和暴露方面显示出巨大的潜力。在这里，设计并构建了在由Ni（OH）₂纳米片支撑的导电镍泡沫上生长的双金属Ni-Co普鲁士蓝类似物。首先，已经实现了镍钴普鲁士蓝类似物在NF表面的均匀分散。通过在煅烧温度下NiSe _2的PBA的受限分解当包含高电子传输速率时，具有较小粒径和良好分散在NF上的/ CoSe可以提供更多的活性位点。氧气析出反应（OER）测量表明，所制备的NiSe ₂ / CoSe / NF具有非常令人印象深刻的OER活性，具有270 mV的低过电势，可达到100 mA / cm ²的电流密度。特殊的纳米阵列结构，丰富的活性位点和较高的固有活性可能有助于其优异的性能。硒化镍钴和支持物的协同作用使得对OER的稳定性更高。这种有限的分解策略可能为控制OER过渡金属基电催化剂的组装提供有希望的方法。