Nanoporous CoFe₂O₄ loaded with Pt-Ag was prepared by dealloying melt-spun Al-Co-Fe-Pt-Ag ribbons and then calcining to increase their hydrogen evolution ability. Results revealed that noble Pt and Ag nanoparticles were homogeneously dispersed and loaded on CoFe₂O₄ nanosheets. When the precursor alloy was Al_90.80Co₃Fe₆Pt_0.08Ag_0.12, the obtained sample exhibited the highest hydrogen evolution rate of approximately 2.36 mmol/h/g under full-spectrum irradiation, being 24 times that of CoFe₂O₄ without Pt or Ag. These analyses indicate that using the appropriate amount of Ag could promote visible-light absorption and Pt could serve as an electron sink for effective electron–hole pair separation. Moreover, the Schottky barrier that formed between the Pt-Ag phase and CoFe₂O₄ effectively suppressed recombination of electron–hole pairs and improved the utilization of photogenerated electrons. Simultaneous loading of Pt and Ag on CoFe₂O₄ resulted in a synergistic effect that contributed to the performance increase.

通过对熔纺Al-Co-Fe-Pt-Ag带进行脱合金，然后煅烧以提高其析氢能力，制备了负载Pt-Ag的纳米多孔CoFe ₂ O ₄。结果表明，贵重的 Pt 和 Ag 纳米颗粒均匀分散并负载在 CoFe ₂ O ₄纳米片上。当前_驱体合金为Al _90.80 Co ₃ Fe ₆ Pt _0.08 Ag _{0.12 时}，所得样品在全光谱辐照下的析氢速率最高，约为2.36 mmol/h/g，是CoFe ₂ O _{4 的}24倍不含铂或银。这些分析表明，使用适量的 Ag 可以促进可见光吸收，而 Pt 可以作为有效电子 - 空穴对分离的电子汇。此外，Pt-Ag 相和 CoFe ₂ O ₄之间形成的肖特基势垒有效地抑制了电子-空穴对的复合，提高了光生电子的利用率。在 CoFe ₂ O ₄上同时负载 Pt 和 Ag产生协同效应，有助于提高性能。