Although Prussian blue and its analogs (PB/PBAs) have open framework structures, large surface areas, uniform metal active sites, and tunable compositions, and have been investigated for a long time, owing to their unfavorable visible light responsiveness, they rarely been reported in photocatalysis. This largely limits their applications in solar-to-chemical energy conversion. Here, a continuous-evolution strategy was conducted to convert the poor-performance NiCo PBA (NCP) toward high-efficiency complex photocatalytic nanomaterials. First, chemical etching was performed to transform raw NCP (NCP-0) to hollow-structured NCP (including NCP-30, and NCP-60) with enhanced diffusion, penetration, mass transmission of reaction species, and accessible surface area. Then, the resultant hollow NCP-60 frameworks were further converted into advanced functional nanomaterials including CoO/3NiO, NiCoP nanoparticles, and CoNi₂S₄ nanorods with a considerably improved photocatalytic H₂ evolution performance. The hollow-structured NCP-60 particles exhibit an enhanced H₂ evolution rate (1.28 mol g^-1h⁻¹) compared with the raw NCP-0 (0.64 mol g^-1h⁻¹). Furthermore, the H₂ evolution rate of the resulting NiCoP nanoparticles reached 16.6 mol g^-1h⁻¹, 25 times that of the NCP-0, without any cocatalysts.

尽管普鲁士蓝及其类似物（PB/PBAs）具有开放的骨架结构、大的比表面积、均匀的金属活性位点和可调的成分，并被研究了很长时间，但由于其不利的可见光响应性，很少被报道在光催化中。这在很大程度上限制了它们在太阳能-化学能转换中的应用。在这里，进行了连续进化策略，将性能差的 NiCo PBA (NCP) 转化为高效的复合光催化纳米材料。首先，进行化学蚀刻以将原始 NCP (NCP-0) 转化为中空结构的 NCP（包括 NCP-30 和 NCP-60），具有增强的扩散、渗透、反应物质的传质和可及表面积。然后，₂ S ₄纳米棒具有显着改善的光催化H ₂释放性能。与原始 NCP-0 (0.64 mol g ^-1 h ^-1 ) 相比，中空结构的 NCP-60 颗粒表现出更高的 H ₂释放速率 (1.28 mol g ^-1 h ^-1 )。此外，在没有任何助催化剂的情况下，所得 NiCoP 纳米粒子的 H ₂释放速率达到 16.6 mol g ^-1 h ^-1，是 NCP-0 的 25 倍。