A Metal‐Polyphenol‐Based Oxygen Economizer and Fenton Reaction Amplifier for Self‐Enhanced Synergistic Photothermal/Chemodynamic/Chemotherapy

provides EFPD with excellent photothermal conversion efficiencies (η = 34.7%) for PTT and photothermal-accelerated drug release. Experimental results indicate that EFPD-mediated synergistic enhancement of PTT/CDT/chemotherapy can achieve excellent therapeutic outcomes, including enhanced ablation of solid tumors, reduced metastasis and cardiotoxicity, and extended life spans.