CAT and neoplasm: Tailored to the specific TME that is characterized by mild acidity, H2O2 overproduction, low catalase activity, and hypoxia,[7, 27] chemodynamic therapy (CDT) is an emerging therapeutic strategy by catalyzing H2O2 through Fenton‐like reactions to generate ROS at tumor sites.[28] With the rapid development of Fenton and Fenton‐like nanomaterial, CDT has attracted tremendous attention.