Regional Electron Transfer and Band Regulation by Cluster-Constrained Nanozyme Growth for Enhanced Catalytic Effect

Due to the complexity of their multiple structures, the catalytic mechanism of Prussian blue composite nanozymes (PB C-NZs) remain to be fully elucidated. Meanwhile, there is currently no relatively clear design concept for the construction of PB C-NZs. Given that PBNZs have an electron transfer catalytic mechanism and intrinsic properties of redox, this work proposes a novel design concept based on electron transfer and energy band difference to improve catalytic activity and oxidation performance. In short, a PB C-NZs with region growing is developed by in situ doping with MoO₃ to increase the active sites and adjust the band position to regulate redox ability. The energy band overlap region of MoO₃ and PB can be used to reduce the band gap for improving the electron transfer efficiency. And its oxidative enzyme-like performance results show that compounds with higher valence bands can be used to improve the oxidation performance. This confirms that the oxidation enzyme-like performance of PB C-NZs are enhanced by energy band differences. The design concept clarifies the factors and electron transfer mechanism of the MoO₃/PB nanozyme to enhance enzyme activity and proposes a novel concept for the design of subsequent redox nanozymes.